3/14/2023 0 Comments Byte crypter v3 cracked![]() ![]() I'm really, really, really disappointed in you Malwarebytes. Hope you've all gained something from this, whether it be entertainment or a new insight! That's it for the demonstration and thank you all for joining me. Well, whaddya know, a piece of malware was lurking in the crypter. Dynamic AnalysisĪnd then we will run the crypter under the debugger. Of course, we can possibly try to deobfuscate the content with the supposed key we just analyzed but let's first try and see the last function call in main. Okay, it looks like a jumbled mess of random values but behind the mask of encryption might lie the program for which we are looking. ![]() Let's take a look at the array which supposedly holds the program to be loaded. Let's take a look at the array that supposedly contains the key. So summing all of this up this loop looks like so: DisassemblingĪll we need to do is to load up our crypted file into IDA to have it disassembled. Looks clean, but it might not actually be when it's executed. Let's try and analyze the file with Avast! and see if it comes up with anything. We'll need to have access to some tools to analyze the crypter so let's find out what they are: Static Analysisįirst off, we should perform a static analysis to try to gain a sort of overall view of what contents the file contains, a reconnaissance, if you will. Note: I am still currently learning more about this so if I happen to get any information incorrect, please leave a comment below or drop a message in my inbox and I will try to patch it ASAP. Right, let's dive right in and get our hands dirty! It's rather important to know and understand these basics so that you can even begin to comprehend the what, how and why. This is the leaked verison fully up to date crypter re programmed (DONT SCAN ON VIRUS TOTAL)to keep it fully (FUD) post a comment for a few virus total scan. I'm also doing this to promote Phoenix750's future series on the Assembly language (you commit to it now, Phoenix750, or people will be disappointed!) and also to give a little peek at what I'm currently studying.īefore we start, I'd like to point out that this analysis will be performed on the RunPE crypter so if you don't know what that is, hop on over to my other article, A Guide on Runtime Crypters, to read up on the PE file format and how the crypter works. The reason I'm writing this article is because I believe that Null-Byte needs a little break away from the Kali/Metasploit scene, something refreshing and different. This will be another Windows-specific guide, so I'll repeat this: If you're a hater and cringe at the slightest sound of Microsoft's grotesque baby, feel free to close this tab, delete your history, exit your browser, pour some oil onto your machine and sanitize it with fire! Else, please continue onwards. This is by no means a universal technique so don't assume that this will occur in every scenario, it's more of a demonstration than anything really. What's up guys? Welcome to a sort of general walkthrough on how one might approach a reversing and analysis on a crypted malware. ![]()
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