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Group for Malware Analysts. Pinned message with resources and rules: https://t.me/MalwareResearch/38033
Hi everyone. Does anyone have the exact encryptor used by The Gentleman group for reverse engineering of the malware? Thanks 🙏
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911578c4d665c12299d237228b7eb5dfe32cf57d1a7b1c155a0fe95d8b31dbb5
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When a sample drops many files, a naming convention that keeps the process and timestamp together can save a lot of guesswork later. How do people here keep the relationship between a dropped file and the process that created it clear?
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That evidence-first approach sounds right. For ambiguous cases, a short record of the evidence, alternatives considered and what would disprove the conclusion could be as useful as the final answer. It makes uncertainty visible rather than letting the agent hide it.
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That’s a good point. I’m still experimenting with different samples, from simple to more complex and ambiguous ones.
So far, I’ve mainly focused on whether the agent can gather the right evidence and reach conclusions that can be verified manually in IDA. Testing misleading routines and uncertainty handling would definitely be a useful next step.
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The useful test for an IDAPython agent is not whether it names an encryption algorithm but whether every conclusion links back to a function, trace or decompiler view an analyst can inspect. That makes the tool easier to trust and to correct when it is wrong.
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Oh, didn't know Andreas Zeller created this as well. His course on debugging is great
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hey guy, anyone know fuzzing binary :v i need learn ab this techniques :v
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If you would like to join the Nullspire hacking team, send us a message.
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Can someone grab this from VT for me?
006f0ba963a63d9b2822b139ac806dee71eb6a3382b1b1db74b5cf2e60b57a51
1c8860b24267cf5ed4bb21db453bc3288c4e9339eeb5d85500847fe2e4dffd73
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Matching a manual walkthrough is a strong sanity check. The next useful test would be a deliberately misleading sample or ambiguous routine, because that shows whether the agent can express uncertainty instead of forcing a clean answer. Does the workflow keep a record of rejected hypotheses too?
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Absolutely, I agree. That is one reason I find integrating the agent with IDA useful. The goal is not just for the agent to give a conclusion, but to link it back to the relevant function, decompiled code, cross-references, or other evidence.
The analyst can then verify the conclusion directly in IDA and correct the agent if needed. I think that kind of traceability and human verification is very important when using AI for reverse engineering.
For reference, here is a separate video where I manually analyze how the malware encrypts the captured keystrokes. The findings from the manual analysis match what the AI agent identified in the demo:
https://youtu.be/EgOQsfhb_j0
I’ve been experimenting with how AI agents can assist with malware reverse engineering by interacting directly with reverse engineering tools and helping analysts investigate unfamiliar code.
In this video, watch an AI agent use tools exposed through IDAPython to analyze a malware sample and determine the encryption algorithm and encryption key used to encrypt captured keystrokes before they are stored in a file. This is currently a quick demonstration without detailed audio narration. I’ll be creating a more detailed video with audio soon, where I’ll walk through the setup, tools, and the complete reverse engineering workflow step by step.
For now, have a look at the demo to see how an AI agent can reason over disassembled code, leverage IDA capabilities through IDAPython, and assist with extracting meaningful information from malware.
AI-Powered Reverse Engineering:
https://youtu.be/gK9BFd_5OAc
https://www.fuzzingbook.org/
This Is a good resource
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That makes the reporting task clearer. First get the expected behaviours and labels from the team, then use curated samples in an isolated lab and record what the sandbox observes rather than only its verdict. Different platforms can disagree because their telemetry, signatures and execution environment differ. Your report should show those gaps instead of treating one verdict as ground truth.
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