DECOMPILING AN AUTOIT EXE CODE
It will not be very pretty code but it will work. All of this makes writing deobfuscators much easier because you can start with well-formatted AutoIt script and your deobfuscator can consist of simple regexps and string replaces. The Autoit script interpreter is designed in such a way that it's really easy to convert P-Code back to the script form. In general, there is nothing hard in decompiling AutoIt scripts. Today I'd like to show some basic approaches to AutoIt deobfuscation. Hide water's signature Hide all signatures.Every once in a while, someone posts an interesting challenge concerning protected or obfuscated AutoIt scripts.
DECOMPILING AN AUTOIT EXE HOW TO
Kimball How to get your question answered on this forum! This should answer all of your questions! You won't get further assistence on this subject here! Hide JLogan3o13's signature Hide all signatures. I don't have Exe2Aut! The official decompiler will only decompile scripts compiled with AutoIt v3. Hide somdcomputerguy's signature Hide all signatures. And how? Share this post Link to post Share on other sites. Posted September 13, Exusme can i Decompiler an Autoit. How to get your question answered on this forum! Whenever someone says "pls" because it's shorter than "please", I say "no" because it's shorter than "yes". You will not receive any assistance on this subject. If you do use my code all I ask, as a courtesy, is to make note of where you got it from. Teach a programmer to debug and he can do his work for a lifetime - by Chirag Gude How to ask questions the smart way! I hereby grant any person the right to use any code I post, that I am the original author of, on the autoitscript. Give a programmer the correct code and he can do his work for a day. If I posted any code, assume that code was written using the latest release version unless stated otherwise. You are commenting using your Twitter account.There is no decompiler for any version of exe created by a version after 3. You are commenting using your Google account. So, when analyzing the compiled binary within a debugger, we now know to set a breakpoint on this function that we find interesting. Depending on the complexity, you could attempt to manually deobfuscate the script by replacing variable names, manually concatenating values, etc….
![decompiling an autoit exe decompiling an autoit exe](https://bytepointer.com/images/flare2015_10_running_exe2aut.jpg)
More often than not, the decompiled script will be heavily obfuscated. Almost instantaneously, the decompiled source code is displayed in the application Figure 12 and the plain-text script is dumped to disk as a. If you are dealing with a compiled scriptsimply drag-and-drop the AutoIt Interpreter executable i. Bottom line, any time you have the opportunity to obtain and analyze the original source code, you take it! Exe2Aut is an application that enables simple drag-and-drop decompilation of compiled AutoIt scripts. With the standalone executable, the malicious payload will be presented as a single. This is just how this particular miscreant decided to trick the victim into running their malware. Note that the method for getting the unsuspecting victim to execute the malicious AutoIt payload will likely differ between samples. As expected, the malicious code is executed by passing in the compiled AutoIt Script WinddowsUpdater. We can see how this malware is executed by inspecting the specified targets of the shortcut files also present within the same directory Figure 6.
![decompiling an autoit exe decompiling an autoit exe](https://www.hexacorn.com/blog/wp-content/uploads/2015/10/pic5.png)
The contents of this particular script is shown in Figure 5. In the example provided in Figure 1, this would be WinddowsUpdater. In order for it to facilitate malicious code execution, the interpreter must be fed a script.
![decompiling an autoit exe decompiling an autoit exe](https://www.trendmicro.com/content/dam/trendmicro/global/en/migrated/security-intelligence-migration-spreadsheet/trendlabs-security-intelligence/2018/11/bladabindi-njrat-3.png)
The AutoIt interpreter, by itself, is benign. Figure 4 shows that the hash for WinddowsUpdater. Third, you can compare the hash of the file in question to the hash of the actual AutoIt3. Second, if you inspect the version information for this file within PEStudio, you will see multiple references to AutoIt medium fidelity Figure 3. The first sign that is the case is the icon for the file, which is the AutoIt icon extremely low fidelity Figure 2. Here is an example of one such malicious sample. I will, however, attempt to provide you with a starting point by showing you how to get from a compiled AutoIt binary to a plain-text script. Unfortunately, there are way too many different ways that malware authors have leveraged AutoIt for me to write a one-analysis-fits-all post. AutoIt is yet-another-development-language that malware authors leverage to create and obfuscate their malware.