Popular scripting languages (JavaScript, batch files, PowerShell, Visual Basic scripts, etc. Net v2013 - with support for WinRT/Win8 Metro apps, Windows Phone 8 apps, and other new features and improvements. Assemblies embedding brings some benefits as well. Encrypting an ID alone will not prevent others to copy and reuse a link. Basic obfuscation (-o option) includes: Renaming functions; Renaming variables; Removing spaces; Removing comments; Encoding Strings. The scramble will make it harder for the antivirus. It scrambles names of classes, methods, variables, and other assembly members. VBA NOP-fuscation. codes to it for stealing the intellectual properties. Free VBscript obfuscator. Well, obfuscation is a good way to protect our intellectual properties and it's better than just leaving our confidential information in plain text. The campaign features malicious attachments in the form of decoy RTF documents. When we compare the original VBScript techniques utilized by the Peachy worm (2001) with our present day Pidief example, it is easy to see these techniques persists simply because they work. Le procédé d'obfuscation a pour finalité de donner un code dit impénétrable. WhibOx 2019 will be a unique get-together event for the white-box crypto community in its entirety. I wanted to elaborate on one of those techniques I mentioned earlier, which was the exclusive or. To use a refactoring, you can place the caret: On a symbol in the text editor. Une faiblesse des macros VBA (pour leurs auteurs) est que le code est forcément stocké en clair dans un document MS Office. In this case, static and dynamic information is used to detect malware. Over the past years, a number of dynamic analysis techniques have been. Base64 encoding would be great but it uses characters in the output that would break a URL, Hex is a bit better if i could wrap it a VBA function somehow. Obfuscation method in VBA code resembles very much the code in: A sample analysis walkthrough with RETouch: Testing a new feature. Basic obfuscation (-o option) includes: Renaming functions; Renaming variables; Removing spaces; Removing comments; Encoding Strings. Vesselin Bontchev (@VessOnSecurity) olevba by Philippe Lagadec (@decalage2) VBA Stomped Examples (benign - safe for experimentation/testing) VBA Stomp Example Documents Repo by Carrie Roberts (@OrOneEqualsOne) VBA Stomped. decode-vbe_V0_0_1. net source code. In this talk, we'll explore the latest in native code obfuscation techniques as well as a few techniques commonly used with interpreted languages. The campaign features malicious attachments in the form of decoy RTF documents. NET code security. Skater Obfuscator is a powerful. Introduction to Visual Basic 2005 Code Samples - Visual Basic 2005 Code Samples provides a large group of well categorized and documented examples of code. 02/27/2019; 6 minutes to read; In this article. Net provides superior code protection, obfuscation, optimization and automatic exception reporting for your. It is very simple to use: No configuration. 8 Ways To Protect And Obfuscate Your. E-mail Obfuscation Techniques; HTML Forms; jQuery Resources; Mobile Friendly Sites; MojoPortal. Bad guys are always using obfuscation techniques to make the analysis more difficult and (try to) bypass basic filters. Article lu fois. ' ' Version. Net provides advanced code protection, obfuscation and optimization for your. NET Obfuscator is for you. VBA + Invoke-Obfuscation. Letters are extracted in an array that is "joined" later to. Volgmer : A Volgmer variant is encoded using a simple XOR cipher. Malware Protective Mechanisms. RustemSoft proposes Skater. Code obfuscation techniques are generally used to make code difficult to understand for researchers, avoid detection by signatures or bypass automated scanning tools. On parle aussi d' assombrissement destiné à rendre le code impénétrable. Il s'adresse à des informaticiens passionnés de sécurité, à des professionnels dans le domaine de la sécurité informatique, qui souhaitent une approche opérationnelle et hautement technique. Excel file for the obfuscation of VBA macros 1. (Note: Malware-Traffic-Analysis. The goal of macro_pack is to simplify antimalware solutions bypass and automatize the process from vba generation to final Office document generation. Here is the abstract: Modern malware uses a wide variety of code obfuscation techniques to hide it’s true intentions and to avoid detection. To see such tactics in actions, review Minerva’s analysis of Emotet’s script obfuscation. Upon opening this spreadsheet, a malware executable is dropped using the VBA macro code and to distract the user, it also opens a decoy spreadsheet. 1- Définition de l'obfuscation En programmation informatique, on appelle obfuscation les techniques mises en œuvre pour transformer le code source afin de le rendre illisible pour un être humain après une forme de compilation, tout en le conservant entièrement opérationnel. A data stealer, Kutaki uses old-school techniques to detect sandboxes and debugging,. This method uses jargon and ingroup phrases to communicate. Where is my stimulus payment? Here's what you need to check. NET Obfuscator is an obfuscation tool for. • Invoke-DOSfuscation handles all layers • Invoke-DOSfuscation supports and randomizes all of these obfuscation components • File copy: cmd /c copy powershell. This tool can be used for redteaming, pentests, demos, and social engineering assessments. The core concept of a dropper is to Download and to Execute a third party payload (or a second stage) and often when you analyse Office dropper you would experience many layers of obfuscation. Data obfuscation (DO) is a form of data masking where data is purposely scrambled to prevent unauthorized access to sensitive materials. It’s a case of hiding in plain sight. The campaign features malicious attachments in the form of decoy RTF documents. NET code protection. The document also uses some basic obfuscation techniques. This implementation allows crafting. NET Obfuscator is an obfuscation tool for. 4 May 2015 First, it is always reactive, you have to understand the deobfuscation technique first Dynamically Analyzing VBA Code by instrumenting VBE 28 Sep 2016 ViperMonkey is a Python project including a VBA macro parser, a VBA However, in some cases it can be a great help to deobfuscate macros. NET assembly is converted into the form which is hard to read after de-compiling to the languages like C# or VB. , string manipulation, dynamic arrays, encoding obfuscation, to evade detection by traditional AV-signatures and. Leveraging of living-off-the-land binaries to bypass Windows AppLocker and fetch the ransomware payload. ' This function uses Internet Explorer to ' create a dialog and prompt for a password. Obfuscation method in VBA code resembles very much the code in: A sample analysis walkthrough with RETouch: Testing a new feature. TLDR; I can write a script to do it, I guess I was hoping for a plug/add-in or extension for Excel or a snippet of VBA that I could play with but given that folks here seem to be having trouble with the basic concept of data obfuscation (and indeed, as it would seem, big complicated words in general:) I'm thinking I may be in the wrong place. Execution of an obfuscation application may cause a computing device to translate bits of a hashed value according to a sparse bit selection pattern, the sparse bit pattern including a translation of bits of the hashed value into reordered bit unit groupings sized according to a numeric base of a digit cypher; and generate an obfuscated value using the translated bit unit groupings of the. A set of 25 specialized code builders supports the fast creation of most used code. Also known as BIFF8. Payload Obfuscation and Reassembly. obfuscation, code encryption and evasion/anti-analysis techniques used to cluster payloads • Focus on malicious documents usage for malware delivery • Tools used • oletools, sandbox for macro emulation, Ollydbg, biffview, Office 2007/2013. com) Code VBA can be added to the Visual Basic for Applications editor programmers in order to create better Visual Basic code faster. A Quick Peek at Invoke-Obfuscation. If you currently have VB applications, and your current programmer(s) quit, you're going to be hard-pressed to replace them. Shell$ jiwmsks, 0 When the document is opened, it will automatically execute whatever code is found within this AutoOpen function and the line above, specifically, will use VBA’s Shell function to execute whatever is stored within the variable “jiwmsks” within a hidden window (0). If you feel that this. NET code protection. These scripts tend to employ obfuscation techniques in order to obscure their. VBA–Code statistics; all identifiers with original names and camouflaged names. net, c#, visual basic, obfuscator, obfuscation, vb. 80 used for an application code protection from reverse engineering, analysis based on a distinctive code transformation. Overview Between July 19 and July 25, 2019, several spear phishing emails were identified targeting three US companies in the utilities sector. The Advanced Solution There is a solution called VBA obfuscation. XLS files that lead to downloader and backdoor FlawedAmmyy, mostly to target users in South Korea. Explaining the Visual Basic concept, introduction to SmartCheck and configuration 10. The function l2B9S can be found in Module3, which also contains more unnecessary code due to obfuscation techniques and is intended to frustrate analysis. Under the Hood. In this issue we look at control obfuscation, a class of obfuscation techniques that targets the control flow in a program. Previous articles about Nymaim's obfuscation technique observed a ROT obfuscation mechanism, but what we had on our hands was different - no ROT order gave us sensible strings, so we went on to deobfuscate the somewhat-short Macro code to reveal its. olevba is a script to parse OLE and OpenXML files such as MS Office documents (e. Technique #3: Living off. It implements all known software protection techniques and obfuscation algorithms. The new obfuscation included some fundamental changes to the document structure (e. In case you missed it, my colleague Josh Reynolds peeled apart the latest variant of H1N1 and analyzed its obfuscation tactics and techniques in the first blog, and in the second blog provides deep technical analysis of its execution. How Obfuscation Impacts Analysis 05. NET products the Skater. obfuscated VBA code will run in both 32/64 bit Office 2010/2013 versions, if your original code was designed to do so. Gator Adware Gator is common adware that is. Enter the PL/SQL source code in Example 5-2. By combining these evasive tricks with code obfuscation, malware authors are provided with a simple, but powerful attack tool. XOR encryption (or Exclusive-OR encryption) is a common method of encrypting text into a format that cannot be trivially cracked by the average person. it seems easy to bypass basic anti virus,but it is difficult to beat enterprise solutions which comes with (HIPS) techniques to detect even commands being passed by XLM 4. Obfuscation is the process of scrambling and encrypting software so that it cannot be easily reverse-engineered. I wanted to publish my email address on a static webpage, so that people can easily contact me. Not all the techniques were used at the same time either. Bad guys are always using obfuscation techniques to make the analysis more difficult and (try to) bypass basic filters. Click the SQL tab to view the source code for the procedure body. Obfuscation Software - Free Download Obfuscation - Top 4 Download - Top4Download. codes to it for stealing the intellectual properties. This implementation allows crafting. Extracting the VBA from those objects, we get the following, which is the full macro code: Recent variants haven't been employing as much difficult obfuscation techniques as in the past, so in this case we really just need to decode the base64, an easy job for CyberChef: Quick work for CyberChef. The primary objective of obfuscation is to reduce the risk of exposure. macro_pack is a tool by @EmericNasi used to automatize obfuscation and generation of Office documents, VB scripts, shortcuts, and other formats for pentest, demo, and social engineering assessments. GitHub Gist: instantly share code, notes, and snippets. , string manipulation, dynamic arrays, encoding obfuscation, to evade detection by traditional AV-signatures and. JO-OBfuscator est un classeur Excel permettant de protéger le code source VBA d'une macro Excel en le rendant quasiment illisible. I like to break into things; both physically and virtually. It implements all known software protection techniques and obfuscation algorithms. Execution of an obfuscation application may cause a computing device to translate bits of a hashed value according to a sparse bit selection pattern, the sparse bit pattern including a translation of bits of the hashed value into reordered bit unit groupings sized according to a numeric base of a digit cypher; and generate an obfuscated value using the translated bit unit groupings of the. 3 MB This book presents advanced forensic detective control and obfuscation techniques for securing hardware IP cores by exploring beyond conventional technologies. This macros are usually quite obfuscated and some of them even have anti-sandbox techniques. In a heterogeneous environment, in which users adopt different levels of obfuscation based on. Luckily, analysis and detection tools are also progressing to address all the advanced attack techniques. Converting Docs to PDFs; Adding a Page to Your CMS ; Moving a Page Within Your Content Management System; Deleting a Page From Your CMS; Changing the Name/URL of Your Page; Adding New Content to Your Existing Page; Linking to Another Page; Linking to PDF or Word; Creating/Linking to an. VBA + Invoke-Obfuscation. Defeating The Latest Advances in Script Obfuscation Mark Mager Mark Mager - @magerbomb In this age of increasingly sophisticated and devastating malware, adversaries still rely on a multitude of scripting languages and frameworks (e. This implementation allows crafting. FOR610: Reverse-Engineering Malware. olevba is a script to parse OLE and OpenXML files such as MS Office documents (e. These techniques result in bytecode that is harder to decompile or that leads to misleading or invalid source code. Do not use this for illegal purposes, period. Before recommending or posting some code, that might be either too unsecure or too complicated for your demand: What do you want to prevent with the obfuscation? If you want to avoid users from changing the obfuscated ID you need a secure en/decryption or some other mechanism. If you currently have VB applications, and your current programmer(s) quit, you're going to be hard-pressed to replace them. One of the best technique hackers groups used is to write malicious code and obfuscate it and embed with Office documents and deliver to the victim through Social engineering ( Spearphishing. zip (https) MD5: 87E61217BC77275DBACEA77B8EDF12B5 SHA256. The way they work is really simple: each of these layers calls other functions that obfuscate code that will become part of the next layer and so on and so forth until the final code. Même si les informations fournies par HA pour chaque échantillon (appels au système, trafic Internet, etc. Pour me protéger des vidages mémoire, j'utilise une technique simple d'obfuscation de texte (comme XOR pour chaque caractère). py - A VBA p-code decompiler by Zilio Nicolas (@Big5_sec) Pcodedmp tool by Dr. - Anti-debugging techniques in order to make reverse engineering process as complicated and complex as possible. Here is the abstract: Modern malware uses a wide variety of code obfuscation techniques to hide it’s true intentions and to avoid detection. GitHub Gist: instantly share code, notes, and snippets. Over the past years, a number of dynamic analysis techniques have been. The primary objective of obfuscation is to reduce the risk of exposure. Hello, We all know that vba password is a weak VBA code protection. Additional Vba obfuscator selection. RustemSoft proposes Skater. Furthermore, if your organization continues to permit Office Macros or hasn’t embarked on application whitelisting, this may be the ammo you need to make the critical point of why it’s. Macro Automation. It implements all known software protection techniques and obfuscation algorithms. L'objectif est de protéger les droits de. Sophisticated approaches provide different levels to strike the right balance between obfuscation and performance. Scripts are usually considered benign, as they’re often used by IT admins to automate various tasks, but threat actors can also use them to issue commands to compromise the victim’s endpoint. into malicious office documents for the purposes of obscuring heuristic, static scanning. Analyzing obfuscated VBA macros to extract C2 IP/URLs regardless of runtime behavior Introduction. One file is obfuscated and uses SQL commands in order to connect to the attackers C2 infrastructure. , on the other hand, is Microsoft's chosen successor to Visual BASIC, and effectively exposes source code at the very heart of Microsoft consumer and enterprise applications. (more details below) Inspired by email: this attack method was previously used in email-borne attacks. Description: The Microsoft Excel Binary File format, with the. By combining these evasive tricks with code obfuscation, malware authors are provided with a simple, but powerful attack tool. Payload Obfuscation and Reassembly. NET code security. Tags: net obfuscator, obfuscate, Obfuscation Net, net, c, vb net, visual basic, obfuscator, obfuscation, net Obfuscator, code Security, code protection, software protection, visual studio 2. — should be enough to satisfy a typical IT security pro, there is some value in. NET Obfuscator is an obfuscation tool for. Office VBA + AMSI: Parting the veil on malicious macros As part of our continued efforts to tackle entire classes of threats, Office 365 client applications now integrate with Antimalware Scan Interface (AMSI) , enabling antivirus and other security solutions to scan macros and other scripts at runtime to check for malicious behavior. It shows you which DLLs and executables are there, the references for each, and information about their obfuscation state and security level. StrReverse Visual Basic function to revers some strings in. Obfuscation is a set of techniques that hide the intent of your Excel VBA program without changing its runtime behavior e. Like obfuscation in natural language, it may use needlessly roundabout expressions to compose statements. The latest attack in late-August was disclosed today [September. It implements all known software protection techniques and obfuscation algorithms. It is easy to obfuscate JavaScript and create enormous numbers of variants of the same threat that do not look at all similar. The obfuscation method was new (to me at least) and piqued my interest. Macro code, obfuscation changes. Everyone has to start somewhere. 4 May 2015 First, it is always reactive, you have to understand the deobfuscation technique first Dynamically Analyzing VBA Code by instrumenting VBE 28 Sep 2016 ViperMonkey is a Python project including a VBA macro parser, a VBA However, in some cases it can be a great help to deobfuscate macros. Every VBA statement must go in between those opening and closing statements. NET Linker visual basic - Download Notice. RTF obfuscation techniques. ROM, a new variant of the Backoff POS malware, is well-versed in this method of evasion to the extent that it replaces API names with the. rustemsoft is using the Skater for internal needs securing all rustemsoft. Malware authors will routinely utilize obfuscation techniques to complicate the analysis of their code. by Alessandro Di Pinto | Nov 20, 2018. CylancePROTECT® Feature Release: Macro Script Control ThreatVector > Blackberry Cylance News. RTF obfuscation techniques. It is difficult to obfuscate complex VBA programs without breaking them. The Obfuscate() function lets you modify strings to an unreadable state without resorting to full-blown cryptographic techniques. it can easy be broken, another option is blocking the VBA to "project is unviewable" which is done two ways, by Sharing the workbook in Shared status and then changing it to an Add-In, this is also no. NQuotes is a C# metatrader. It will obfuscate using all of the techniques in your current menu. The use of obfuscation techniques to preserve the privacy of user ratings is well studied in the literature. read(data, read_opts) attempts to parse data. We have recently observed that the Mirai-variant FBot (detected by Trend Micro as IoT. And the Allatori team have achieved tremendous results - we have managed to provide the most comprehensive set of features on the market for the highest possible protection of your. Whether it’s running UnmanagedPowerShell from VBA or using a. How can I de-obfuscate a Visual Basic program? Hello, I was given some malware which is apparently written in VB and employs some obfuscation techniques to thwart analysis. macro_pack is a tool by @EmericNasi used to automatize obfuscation and generation of Office documents, VB scripts, shortcuts, and other formats for pentest, demo, and social engineering assessments. Background on Macros. Our staff has years of experience in fighting malware, and goes to great lengths to see. I took two macros from my Under-The-Hood suite “SaveAsParagraph†and “SaveAsSelection†with their associated procedures. NET Obfuscation Checker. Here we paste the payload code in VBS that we create at the beginning of the practical. Macrobject Obfuscator. These transformations break up logically related computations or merge logically unrelated ones, randomize the order of computations, insert new or irrelevant computations. Pour me protéger des vidages mémoire, j'utilise une technique simple d'obfuscation de texte (comme XOR pour chaque caractère). Conclusion 3. The extracted VBA code shows some peculiar things. I added a random switch between addition and subtraction as you. Some of them are tied to menu commands, while the automacros are. Overview Between July 19 and July 25, 2019, several spear phishing emails were identified targeting three US companies in the utilities sector. Obfuscation is a set of techniques that hides the intent of your Excel VBA program without changing its runtime behavior e. It implements all known software protection techniques and obfuscation algorithms. VBA Reverse Engineering Tools; pcode2code. • Observed during Feb. Il s'adresse à des informaticiens passionnés de sécurité, à des professionnels dans le domaine de la sécurité informatique, qui souhaitent une approche opérationnelle et hautement technique. It is also popular in non-malicious contexts, making false positives based on this indicator a significant challenge. Throughout 2017 we have observed a marked increase in the use of command line evasion and obfuscation by a range of targeted attackers. On a file or a selection of files in the Solution Explorer tool window. JO-OBfuscator is an Excel workbook that protects the VBA source code of an Excel macro by making it almost unreadable. Defeating The Latest Advances in Script Obfuscation Mark Mager Mark Mager - @magerbomb In this age of increasingly sophisticated and devastating malware, adversaries still rely on a multitude of scripting languages and frameworks (e. Obfuscation in the Wild: Targeted Attackers Lead the Way in Evasion Techniques. NET Obfuscator is protection software for. Some obfuscation techniques raise. JavaScript-based attacks have been reported as the top Internet security threats in recent years and have become a major mechanism for web-based malware. Net v2013 released We are pleased to announce the release and immediate availability of Crypto Obfuscator for. ü We see obfuscated code every single day when we analyze commom userland malware, droppers written in VBA and Powershell, so it mightn’t seem to be a big deal. The researchers found that the campaign uses common attack techniques, such as data obfuscation and VBA scripting, but that it also goes to great lengths to hide its infection processes. The macro_pack is a tool used to automatize obfuscation and generation of MS Office documents for pentest, demo, and social engineering assessments. - On the fly polymorphic code encryption and decryption. Jack Halon. He spent a year exploring all kinds of PowerShell command line obfuscation techniques — and he’s got the beard to prove it! —to make it almost impossible to scan for obvious keywords. If you would like periodically obfuscate your. Malware using document files as an attack vector has continued to increase and now constitutes a large portion of phishing attacks. Overview Between July 19 and July 25, 2019, several spear phishing emails were identified targeting three US companies in the utilities sector. But VBA macros remain a classic way to drop the next stage of the attack on the victim’s computer. Je puise dans le site Hybrid Analysis pour trouver ces féroces créatures. CofenseTM recently found a phishing campaign that hides the Kutaki malware in a legitimate application to bypass email gateways and harvest users’ credentials. We see the use of form and textbox objects within the VBA code. Activate Code Security Code Codes and Scripts Downloads Free. After we drop the chunk of Base64 into CyberChef, we just need to decode and then remove the. It's "Old-New" because the file was found in the wild back in February, but as it seems, no one has paid attention to its operation, which I found quite interesting. There are also obfuscation techniques to further hide the infected document’s true intentions. Full name: Microsoft Office Excel 97-2003 Binary File Format (. Retrieve data from a table of aspx page using Excel VBA By Hường Hana 1:00 AM asp. A decompiler tries to translate an object file into a compilable source file. Recently, the Gigamon ATR team observed a shift in techniques including a modified payload that uses a new embedded file type. It implements all known software protection techniques and obfuscation algorithms. The New York Times. NET application code protection. Obfuscation is not used to avoid decompiling C++ code, it is intended to avoid understanding, it is designed to fool and fake the cracker, making nosense calls to OS routines, writting in dummy buffers, altering and swaping with real data. It implements all known software protection techniques and obfuscation algorithms. I wanted to elaborate on one of those techniques I mentioned earlier, which was the exclusive or. NET IL Code and protect. NET framework applications from illegal code extraction and reverse. RTF obfuscation techniques. Nyotron renamed it Copperfield, in honor of Houdini’s well-known contemporary David Copperfield, to recognize the malware’s new use of obfuscation and advanced masquerading techniques. Paste in your macro code into this window: Give the template a name and save the file as a. Explaining the Visual Basic concept, introduction to SmartCheck and configuration 10. It is an application which checks obfuscation and references. First, you will see how obfuscation will affect your analysis and effective strategies for defeating a variety of obfuscation methods. “My guess is that triple encryption might be a little bit more effective than most of the usual obfuscation techniques, since it is applied multiple times on multiple layers (i. It’s a case of hiding in plain sight. Just a quick post about a problem that security analysts are facing daily… For a while, malicious Office documents are delivered with OLE objects containing VBA macros. Notably, as with all scripting languages, attackers have another advantage: they can hide malicious code through obfuscation. net source code. It took a while for the actors to update any obfuscation techniques for the JScript code but around the middle of December, versions started to make use of Microsoft Script Encoding replacing their custom ASCII cipher perhaps for simplicity or bugs they themselves were finding difficult to debug. vb (for Visual Basic. Net provides superior code protection, obfuscation, optimization and automatic exception reporting for your. The antivirus companies are aware of the encoding methods and they have found ways to identify them. This makes the analysis. NET assembly is converted into the form which is hard to read after de-compiling to the languages like C# or VB. Frontiers in Securing IP Cores: Forensic detective control and obfuscation techniques by Anirban Sengupta English | PDF | 2019 | 345 Pages | ISBN : 1839530316 | 25. If you need to make corrections, click the Previous button. DOSfuscation, Reverse String, & Substitution. Hello, We all know that vba password is a weak VBA code protection. vb (for Visual Basic. For years, I have been intrigued with the idea of. The access to this course is restricted to eForensics Premium or IT Pack Premium Subscription Word documents, PDFs, photos, and other types of files that are infected with viruses endanger the security of your system every day. Is there any free VBscript. Conclusion 3. It implements all known software protection techniques and obfuscation algorithms. NET IL Code and protect. A multi-stage fileless infection chain, using VBA code, WMI objects, and JavaScript to drop the ransomware. During the whole period in which we observed Powload's activities, the techniques used were constantly changing — from minor modifications like changing the titles and styles of the malicious emails to building up a wide array of obfuscation techniques over time. macro_pack will simplify antimalware solutions bypass and automatize the process from vba generation to final Office document generation. The macro_pack is a tool used to automatize obfuscation and generation of MS Office documents for pentest, demo, and social engineering assessments. Here’s a quick overview of the skills you should look for in JavaScript developers: Web fundamentals, including HTML, CSS, and JavaScript. Obfuscation in the Wild: Targeted Attackers Lead the Way in Evasion Techniques. Figure 9: VBA de-obfuscation code for extra layer of JScript obfuscation. It is very simple to use: No configuration Everything can be …. Defeating The Latest Advances in Script Obfuscation Mark Mager Mark Mager - @magerbomb In this age of increasingly sophisticated and devastating malware, adversaries still rely on a multitude of scripting languages and frameworks (e. exe bypass, APT32 used cmd. Just for fun - how would you intentionally obfuscate a spreadsheet? Discussion Programmers among you might be aware of the The International Obfuscated C Code Contest , wherein C coders compete to see who can write the most head-scratchingly obscure code. We want to encrypt it with the key "cle". VBA is a programming language which is developed by Microsoft to be used for the Microsoft office package such as Word, Access, Excel and others. Saturday, March 14, 2015. The theme is important to researchers in various areas of. NET Obfuscator 8. 4 May 2015 First, it is always reactive, you have to understand the deobfuscation technique first Dynamically Analyzing VBA Code by instrumenting VBE 28 Sep 2016 ViperMonkey is a Python project including a VBA macro parser, a VBA However, in some cases it can be a great help to deobfuscate macros. The goal of macro_pack is to simplify antimalware solutions bypass and automatize the process from vba generation to final Office document generation. Note that obfuscation is not restricted to your source code only. Bad guys are always using obfuscation techniques to make the analysis more difficult and (try to) bypass basic filters. This method uses jargon and ingroup phrases to communicate. The Obfuscation Checker scans a directory and inspects the assemblies and. changing eval calls to print calls10) , the investigator, Daniel Wesemann, discovered several of the obfuscation techniques used by the malevolent developer. I like to break into things; both physically and virtually. NET code protection. Here are several obfuscation techniques employed by hackers with ways you can protect yourself from them. Execution of an obfuscation application may cause a computing device to translate bits of a hashed value according to a sparse bit selection pattern, the sparse bit pattern including a translation of bits of the hashed value into reordered bit unit groupings sized according to a numeric base of a digit cypher; and generate an obfuscated value using the translated bit unit groupings of the. In this case it’s stream A3. This course contains materials to aid the student in broadening their knowledge of advanced network assessment techniques including enumeration, scanning and reconnaissance. After we drop the chunk of Base64 into CyberChef, we just need to decode and then remove the. Compiled VBA Code Is Secure. VBA malware is largely used cyber threat actors due the possibility to rapidly change their code to implement new evasion techniques, the exploits. • Invoke-DOSfuscation handles all layers • Invoke-DOSfuscation supports and randomizes all of these obfuscation components • File copy: cmd /c copy powershell. You’ll learn how to create VBA Macro-Based Malware, use phishing for deception, and use Kali Linux to increase the effectiveness of the attack. There is a technic you probably know called code obfuscation, which enable to noise the code. Malicious Excel With a Strong Obfuscation and Sandbox Evasion. Active 10 months ago. The following are obfuscated strings passed to the. Background on Macros. NET products the Skater. Il s'agit d'un fichier Excel pour l'obfuscation des macros VBA. For instance, if. com, or any other service that allows sharing content. JavaScript-based attacks have been reported as the top Internet security threats in recent years and have become a major mechanism for web-based malware. With new methods and technologies being developed at an exponential level, it. Anckaert et al. dotm format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. However, they use very basic obfuscated techniques when they are compared to sophisticated threats. Run a Total Access Emailer Function from a Macro. The function l2B9S can be found in Module3, which also contains more unnecessary code due to obfuscation techniques and is intended to frustrate analysis. We want to encrypt it with the key "cle". Malware authors will routinely utilize obfuscation techniques to complicate the analysis of their code. But VBA macros remain a classic way to drop the next stage of the attack on the victim's computer. Version control also enables one person you to use multiple computers to work on a project,. There is a solution called VBA obfuscation. ViperMonkey. An example of where this might come in handy is for storing string data in the registry in such a manner that the original contents are not easily searched for and that the typical user won't recognize the data. NET products the Skater. This new variant of macro malware not only has high-level obfuscation techniques but also several layers of evasion. The new obfuscation included some fundamental changes to the document structure (e. MYTHIC LEOPARD actors have previously used an indigenously produced. Il s'agit d'un fichier Excel pour l'obfuscation des macros VBA. Demo: Defeating VBA Obfuscation 11. VBA Obfuscation and Macro Obfuscation Visual Basic Obfuscation via Line Continuation Be careful while writing YARA signatures for Microsoft Office Macros. The Simplicity of VBA Malware (Part 1 of 2) Updated: Oct 5, More information on obfuscation techniques used by VBA malware authors will be covered in part two of this series. RE was a box I was really excited about, and I was crushed when the final privesc didn’t work on initial deployment. NET obfuscation tool to hide malware implants as legitimate tools. txt is a the output of a proof-of-concept model for obfuscation. obfuscated VBA code will run in both 32/64 bit Office 2010/2013 versions, if your original code was designed to do so. Using VBA macro TA505 has been using Excel 4. Also known as BIFF8. Jack Halon. The attacker has many ways to fetch the next stage. Obfuscation is Encryption refers to the technique of keeping sensitive information confidential by changing the form of information. What initially caught our attention was the Macro payload. Payloads may be compressed, archived, or encrypted in order to avoid detection. NET code protection. vince March 1, 2020 March 2, 2020 Emotet, Macro, PowerShell Downloader Read more. Description: The Microsoft Excel Binary File format, with the. Examples are better than words, let's take the word "xor". Cocks' Identity-Based Encryption in the Standard Model, via Obfuscation Techniques (Short) Xin Wang, Shimin Li and Rui Xue; Cryptanalysis on Symmetric-key Primitives. It’s a case of hiding in plain sight. Understanding Code Obfuscation 04. Publisher: AGORA Software BV; Last updated: October 19th, 2017; Babel Obfuscator. Prevalent Obfuscation Techniques 09. exe obfuscation techniques to attempt to break signature-based detection of this argument. We will spend time discussing such methods as dynamically constructing import tables, hiding and using shellcode, packing, string obfuscation, use of virtual machines and other anti-analysis. For example, if a name is 20 characters long, renaming it to a() reduces its size by 95%. it can easy be broken, another option is blocking the VBA to "project is unviewable" which is done two ways, by Sharing the workbook in Shared status and then changing it to an Add-In, this is also no. However, they still hide the command and malicious URL in “UserForm” and not in VBA code. Encrypting the MSFVenom payloads with the MSFvenom encode option is not enough. xls payloads. NET code protection. VCG is an automated code security review tool for C++, C#, Java and PL/SQL which is intended to drastically speed up the code review process by identifying bad/insecure code. So I have started to consider obfuscation to 'scramble' my own code instead and. NET executables and assemblies. TTP – Tactics, Techniques, and Procedures The attackers use many various types of malware and tools, in addition to Dridex, before and during the encryption incident. Kaspersky Security Trainings Cybersecurity education is the critical tool for enterprises faced with an increasing volume of constantly evolving threats. Net, PHP, JSP and Servlets, and integrating them to Filemaker, MSAccess, SqlServer and MySQL. Today, I would like to make a comparison between two techniques applied to malicious code to try to bypass AV detection. VBA + Invoke-Obfuscation. Net Framework to enable powerful systems automation to improve RIO into Microsoft technologies. Malware Defense. Throughout 2017 we have observed a marked increase in the use of command line evasion and obfuscation by a range of targeted attackers. In a heterogeneous environment, in which users adopt different levels of obfuscation based on. net , excel , excel-vba , http , vba Leave a Comment I am trying to retrieve table data from aspx page using excel vba. obfuscated VBA code will run in both 32/64 bit Office 2010/2013 versions, if your original code was designed to do so. But VBA macros remain a classic way to drop the next stage of the attack on the victim's computer. Code obfuscation techniques are generally used to make code difficult to understand for researchers, avoid detection by signatures or bypass automated scanning tools. There are hundreds of new malware families every month, but polymorphism means each instance of that malware is unique — so you only have one chance to catch it: in 2018 Webroot detected 500 million “brand new. CylancePROTECT® Feature Release: Macro Script Control ThreatVector > Blackberry Cylance News. Reverse-Engineered Source Code After Overload Induction Obfuscation: private void a (a b) { while (b. com, or any other service that allows sharing content. We also touch on the latest TA505 developments, including an email stealer, their use of legitimate software and MSI Installer, and more. Doing this. Net provides superior code protection, obfuscation, optimization and automatic exception reporting for your. NET Obfuscator Skater Light Edition is an obfuscation tool for. vba obfuscator github, * Hi all, I'm working on a new project, and this is the first time I've ever looked for a JavaScript obfuscator. Macro-based malware continuously evolves and poses challenges in detection using techniques like sandbox evasion and code obfuscation. The phishing emails appeared to impersonate a US-based engineering licensing board with emails originating from what appears to be an actor-controlled domain, nceess[. WiryJMPer is a seemingly ordinary dropper with unusual obfuscation. Malware authors often employ advanced obfuscation techniques in an attempt to bypass security procedures. NET framework applications from illegal code extraction and reverse. Most modern EDR solutions use behavioral detection, allowing to detect malware based on how it behaves instead of solely using static indicators of compromise (IoC) like file hashes or domain names. If you would like periodically obfuscate your. Figure 9: VBA de-obfuscation code for extra layer of JScript obfuscation. txt is a the output of a proof-of-concept model for obfuscation. 00 Freeware. This blog is the first in a 3 part series that will provide an in-depth technical analysis on the H1N1 malware. Ce livre décrit les techniques et la méthodologie utilisées par les professionnels de l'analyse de malwares (ou logiciels malveillants). deal that people can get a hold of your source code. Or at least their length. As Microsoft security wrote to me ^If a user enables a malicious macro, then they have already been compromised, I want to be sure people know why… 1. What initially caught our attention was the Macro payload. Obfuscation can actually be implemented at three levels: control flow, layout (objects, literals, variables, and method names), and data. JavaScript obfuscation refers to a technique that is commonly used to obscure the operation and intent of JavaScript code contained within a web page. Celui qui voudrait ensuite voir les propriétés du Projet ainsi que le code VBA aura droit à une fenêtre pop-up lui demandant d'introduire le mot de passe. 0: XOR decoding/de-obfuscation loop The second is a VBA implementation of base64 that decodes it to produce a final Portable Executable (PE): Figure 7. It implements all known software protection techniques and obfuscation algorithms. com offers free software downloads for Windows, Mac, iOS and Android computers and mobile devices. NET code protection. Figure 7: Three different obfuscation techniques used within the same malicious function. In this case I review a Trickbot downloader which hides an interesting nuance if. Ce script intègre plusieurs méthodes d'obfuscation, des techniques d'anti-désassemblage et d. GreyEnergy is an Advanced Persistent Threat (APT) which has been targeting industrial networks in Ukraine and other Eastern European countries for the past several years. Alors bien sûr, il y a AES pour toutes les données qui sont vraiment sensibles. CylancePROTECT® Feature Release: Macro Script Control ThreatVector > Blackberry Cylance News. In addition to obfuscation, the developer had exploited a peculiarity in JavaScript itself, the arguments. Obfuscated Files or Information Adversaries may attempt to make an executable or file difficult to discover or analyze by encrypting, encoding, or otherwise obfuscating its contents on the system or in transit. Prompted by this discovery, the author began researching obfuscation techniques supported by. The experts discovered different VBA downloader templates, which contain VBA code and the instructions for the authors of VBA Malware on how to package their malicious code and how to obfuscate it. However, further analysis of the code in Module3 reveals a call to another function named “EUwBq”. If the obfuscation techniques used in the macro are complex, sometimes we can have the opposite and attackers are trying to defeat basic controls. Obfuscation and other forms of detection evasion. Figure 9: VBA de-obfuscation code for extra layer of JScript obfuscation. Defeating The Latest Advances in Script Obfuscation Mark Mager Mark Mager - @magerbomb In this age of increasingly sophisticated and devastating malware, adversaries still rely on a multitude of scripting languages and frameworks (e. So I have started to consider obfuscation to 'scramble' my own code instead and. The built-in VBA editor is a useful tool for many tasks, but we opted for using Notepad++ for decoding obfuscation layers and the find and replace operations. Campaign version one. Macro Automation. NET enabling development of automated trading programs ("expert advisors" and indicators) for MT4 with C#, Visual Studio tools and. NET Obfuscator is protection. It implements all known software obfuscation methods. It is very simple to use: No configuration Everything can be …. Because obfuscation isn't security and because OS obfuscation is basically nonsense. Carbanak) testing a novel obfuscation technique native to cmd. Current obfuscation methods include flow obfuscation, string encryption, proxy calls, unique renaming scheme (create gibberish WinAPI like name), junk codes, and removing all functions (merging them with the main script), traps to prevent automated deobfuscation, debugger detection, VM detection, moving strings to other parts of scripts (functions, proxy strings, etc), exit if not compiled. There are two types of DO encryption: Cryptographic DO: Input data encoding prior to being transferred to another encryption schema. Although obfuscation is related to malicious code detection, little research has been conducted on obfuscation with regards to Visual Basic for Applications (VBA) macros. Quelles sont les recommandations d'outils qui peuvent masquer le code VBA à travers les formulaires, les modules et les modules de classe? J'ai fait un peu de recherche et je lis ici dans les arch… javascript - Problèmes lors de l'utilisation d'AES. It continues to be no surprise that malware tries to hide using an array of techniques that are easy to implement. Bjorn De Sutter 2,363 views. A technique that makes a message difficult to understand because of its ambiguous language is known as obfuscation. This article focuses on the analysis details of the Excel spreadsheet and obfuscation techniques used by the attackers. It implements all known software protection techniques and obfuscation algorithms. Malware Protective Mechanisms. ) with malicious VBA macros as attachments. With further analysis, we can summarize the following key components of the payload: AutoOpen() is used to load the payload. Code obfuscation is different in essence from hardware obfuscation, where description and/or structure of a circuit is modified to hide its functionality. This makes the analysis. Popular scripting languages (JavaScript, batch files, PowerShell, Visual Basic scripts, etc. Obfuscation The tool will use various obfuscation techniques, all automatic. Dotfuscator's Renaming Obfuscation changes the names of types, fields, properties, methods, and parameters within the input assemblies. JavaScript developers are simply web developers who specialize in JavaScript. NET code protection. 8k Downloads; Part of the Lecture Notes in Computer Science book series (LNCS, volume 11689) Also part of the Security. NET Obfuscator is an obfuscation tool for. ViperMonkey is a Python project including a VBA macro parser, a VBA emulation engine and a set of tools for malicious macro analysis. Here’s a quick overview of the skills you should look for in JavaScript developers: Web fundamentals, including HTML, CSS, and JavaScript. excel vba - Comptage de référence VBA-Destruction d'objets. Crypto Obfuscator For. javascript compress obfuscator c. The authors of Locky used uncommon obfuscation via the CallByName function and a significant string to generate the VBS code. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. Obfuscate VBScript Macros 138 Skills Required for CATIA V5 Automation VBA (Visual Basic for Applications) or Visual Basic 6 basics VBA (Visual Basic for. StrReverse() serves well as an example, but it is a well-known obfuscation technique that can be keyed off of for detection. JavaScript obfuscation refers to a technique that is commonly used to obscure the operation and intent of JavaScript code contained within a web page. Consider, for example, the JavaScript detection code introduced in the Ad Blocker Detection Techniques chapter of this book:. It is a powerful and convenient tool to perform an operation repeatedly and also helps in analyzing the data. The campaign features malicious attachments in the form of decoy RTF documents. to be skilled in the advanced security techniques that form a key component of effective enterprise threat management and mitigation strategies, while all employees should have a basic awareness of the dangers and how to work securely. DLET), also known as Satori, has resurfaced with brand-new obfuscation and brute-force techniques. Cela rend les données de texte en clair plus difficiles à distinguer des variables et ainsi de suite. JO-OBfuscator is an Excel workbook that protects the VBA source code of an Excel macro by making it almost unreadable. The detection covers HTML documents that have been crafted with the intention of evading antivirus detection. During the whole period in which we observed Powload's activities, the techniques used were constantly changing — from minor modifications like changing the titles and styles of the malicious emails to building up a wide array of obfuscation techniques over time. In a heterogeneous environment, in which users adopt different levels of obfuscation based on. NET assembly is converted into the form which is hard to read after de-compiling to the languages like C# or VB. Continued reversing techniques in VB, use of decompilers and a basic anti-anti-trick 11. NET Obfuscator v. Off the back of this, I hacked together a quick piece of vba to speed up my analysis efforts. First, they infiltrate the network (usually via malspam email, or other common and successful phishing tools). I ran them through the VBA Code Cleaner to strip comments and white space. There are hybrid techniques that combine the two approaches[38]. Tip: remove all white space around operators. NET Obfuscator is for you. 9 Citations; 8 Mentions; 5. This article outlines a simple tool to search Access tables or linked tables to find if a text string(s) exists in those tables. In order to understand the difficulties in testing malware de-tectors one has to understand the obfuscation-deobfuscation game that malware writers and developers of malware de-tectors play against each other. --memory (to. 8k Downloads; Part of the Lecture Notes in Computer Science book series (LNCS, volume 11689) Also part of the Security. In this issue we look at control obfuscation, a class of obfuscation techniques that targets the control flow in a program. Obfuscation is a set of techniques that hide the intent of your Excel VBA program without changing its runtime behavior e. NET code protection. This helps better simulate how certain suspicious files, such as kernel exploits, can affect the system. The campaign features malicious attachments in the form of decoy RTF documents. JavaScript Code Obfuscation Techniques For Malware Delivery By Satyajit Daulaguphu on Sunday, April 1, 2018 JavaScript code obfuscation techniques play a key role in delivering a malicious payload when an attackers want to target their users and they achieve this by hiding their code so that it could evade the detection of anti-virus software. How Obfuscation Impacts Analysis 05. New WhiteShadow Downloader Uses MSSQL Servers for Malware Delivery various detection evasion techniques like code obfuscation. Well, obfuscation is a good way to protect our intellectual properties and it’s better than just leaving our confidential information in plain text. the need for some stealth techniques. The use of API's in software, avoiding doublechecking tricks 14. The researchers found that the campaign uses common attack techniques, such as data obfuscation and VBA scripting, but that it also goes to great lengths to hide its infection processes. Alors bien sûr, il y a AES pour toutes les données qui sont vraiment sensibles. Le code impénétrable d'un programme informatique est un code dont la compréhension est très difficile pour un humain tout en restant parfaitement compilable par un ordinateur. Vesselin Bontchev (@VessOnSecurity) olevba by Philippe Lagadec (@decalage2) VBA Stomped Examples (benign - safe for experimentation/testing) VBA Stomp Example Documents Repo by Carrie Roberts (@OrOneEqualsOne) VBA Stomped. Visual Basic is a perfectly good language for creating. NET, Xamarin and Universal Windows Platform apps. Removing spaces. This article outlines a simple tool to search Access tables or linked tables to find if a text string(s) exists in those tables. This obfuscator borrows from known malware techniques that employ random strings for function/subroutine or object names and ascii code randomization by performing math operations to split the number up a number into equal values so that when added matches the original ascii value. Malicious software that uses obfuscation and evasion techniques on Windows’ built-in scripting hosts will automatically be inspected at a much deeper level than ever before,. Defeating The Latest Advances in Script Obfuscation Mark Mager Mark Mager - @magerbomb In this age of increasingly sophisticated and devastating malware, adversaries still rely on a multitude of scripting languages and frameworks (e. True to form, Sparc Flow is an alias the writer uses to stay anonymous. ) devraient suffire à satisfaire la plupart des. In this first post in a series on Comeback of VBA Downloaders, we show how evasion techniques that are well-known for binary programs have found their way into VBA. Tout est GRATUIT. But for the interview, the goal was to educate views on what dynamic programming is, what the benefits are, and why developers should care - all in the context of Visual Basic today and tomorrow. Figure 2 shows a redacted screenshot of our Host Investigative Platform (HIP) capturing real-time attacker activity during one of. We often receive support requests on guide how to protect overlay and self-test applications using Enigma Protector. Guiding a program by multiple patching. The problem was that I am afraid of spam bots that crawl the Internet and harvest email addresses from HTML code. Net Crypto Obfuscator For. It makes declaring variables quicker. VBA obfuscation is a set of techniques that hide the intent of an Excel VBA program without changing its runtime behavior. GreyEnergy is an Advanced Persistent Threat (APT) which has been targeting industrial networks in Ukraine and other Eastern European countries for the past several years. Je viens de tester obfuscation, je ne trouve pas le procédé très efficace car si on connait VBA, un simple recherche remplacer remet le programme d'aplomb et lisible 1- le programme origiel Sub exercice_boucles() Const NB_CASES As Integer = 10 'Damier de 10x10 cellules Dim lig As Integer, col As Integer ' => ajout de 2 variables. Not all the techniques were used at the same time either. com, dropbox. Over the past years, a number of dynamic analysis techniques have been. Obfuscation is the process of making code harder to understand in decompiled form, without changing the semantics. xlsm) that spread malware by executing malicious VBA (Visual Basic for Applications) code. It is essential to analyze how these obfuscation techniques are used in malware. GitHub Gist: instantly share code, notes, and snippets. Malware authors often employ advanced obfuscation techniques in an attempt to bypass security procedures. The New-Object cmdlet for example, could be rewritten as: &('{1}{0}'-f'bject',New-O'}. Net code against reverse-engineering. The download URL is “encrypted” and hard-coded as an array. Selon les versions, le téléchargement de Dridex peut s'effectuer soit directement par la macro VBA, soit plus généralement par l'intermédiaire d'un script VBS téléchargé sur le site : « pastebin. Figure 1: A classification of malware detection techniques. Powered by Pure, Scopus & Elsevier Fingerprint Engine™ © 2020 Elsevier B. 1- Définition de l'obfuscation En programmation informatique, on appelle obfuscation les techniques mises en œuvre pour transformer le code source afin de le rendre illisible pour un être humain après une forme de compilation, tout en le conservant entièrement. I’m now studying for certification and using captured malware samples for doing exercises. Earlier this week I came across some rather interesting JavaScript injected into legitimate sites. NET executables can easily be reverse engineered by free tools (such as ILSpy, dotPeek and JustDecompile), potentially exposing algorithms and intellectual property (trade. For years, I have been intrigued with the idea of. As such, most PowerShell obfuscation techniques work by using string manipulation techniques. A VBA implementation of the RunPE technique or how to bypass application whitelisting. It is very simple to use: No configuration. As detection techniques. ü We see obfuscated code every single day when we analyze commom userland malware, droppers written in VBA and Powershell, so it mightn’t seem to be a big deal. Net v2013 released We are pleased to announce the release and immediate availability of Crypto Obfuscator for. Well, obfuscation is a good way to protect our intellectual properties and it's better than just leaving our confidential information in plain text. It is essential to analyze how these obfuscation techniques are used in malware. Carbanak) testing a novel obfuscation technique native to cmd. Net Crypto Obfuscator For. 0: String obfuscation technique example. There is a solution called VBA obfuscation. The macro_pack is a tool used to automatize obfuscation and generation of MS Office documents for pentest, demo, and social engineering assessments. Upon opening this spreadsheet, a malware executable is dropped using the VBA macro code and to distract the user, it also opens a decoy spreadsheet. It is difficult to obfuscate complex VBA programs without breaking them. This is where Bohannon’s Invoke-Obfuscation tool comes into play. The macro_pack is a tool used to automatize obfuscation and generation of MS Office documents for pentest, demo, and social engineering assessments. This is an old attack that slipped by multiple security products (McAfee Endpoint Security and Malwarebytes) installed on the customer’s endpoints. The Malicious Macro Generator is an open source Python script to generate obfuscated macros that include anti-virus and sandbox evasion techniques. The group is also using an obfuscated Visual Basic for Applications (VBA) script to establish persistence as a registry key. The researchers found that the campaign uses common attack techniques, such as data obfuscation and VBA scripting, but that it also goes to great lengths to hide its infection processes. Scanning files you open and save isn't enough to catch malware these days. These measures include Daniel Bohannon’s Invoke-Obfuscation for PowerShell and Invoke-DOSfuscation frameworks. The scramble will make it harder for the antivirus. Cela m'a fait me demander quel genre de technique d'obfuscation a été utilisé là. It is essential to analyze how these obfuscation techniques are used in malware. Shell$, Shell, or a variation of CreateObject(“WScript. Filling an array in VB that will contain an arbitrary code is pretty easy. However, further analysis of the code in Module3 reveals a call to another function named “EUwBq”. Emotet Malware PowerShell Obfuscation & Evasion Review. macro_pack - tool to automatize obfuscation and generation of MS Office documents for pentest Short description The macro_pack is a tool used to automatize obfuscation and generation of retro formats such as MS Office documents or VBS like format. We can use obfuscation as a way to prevent reverse engineering. NET languages, like C# and Visual Basic. Avoid Common Obfuscation Problems using intelligent rules and automatic exclusions. --memory (to.