@cryptax – Medium

@cryptax

Rust in your disassembler

At r2con this year, I am going to present how to solve a CrackMe binary written in Rust. As the conference is online, I chose to record it…

Oct 6

Oct 6

Linux/Trigona: analysis with r2ai

Update Aug 26: added reverse engineering of VMWare ESXi features

Aug 25

Linux/Trigona: analysis with r2ai

Aug 25

r2ai with lmstudio and gpt-oss

Background: radare2, nickname “r2”, is an awesome open source disassembler. r2ai is an open source plugin for r2 to communicate with an AI.

Aug 19

r2ai with lmstudio and gpt-oss

Aug 19

Malware W32/SkyAI uses AI? So do I.

A new malicious sample, named W32/SkyAI (or Topozuy, or Skynet), has recently emerged, showing use of a AI prompt bypass attempt. Perfect…

Jul 4

Malware W32/SkyAI uses AI? So do I.

Jul 4

Communication with a Prometei C2 — Part Three

I am analyzing a Linux Prometei sample of February 2025. In Part One, we found out this sample was packed. In Part Two, we analyzed the…

Feb 18

Communication with a Prometei C2 — Part Three

Feb 18

Reversing an (unpacked) Prometei binary with r2 and AI — Part Two

Thanks to Joan Calvet and Gabriel Hung, we unpacked the Prometei binary of Part One, and now have an ELF…

Feb 11

Reversing an (unpacked) Prometei binary with r2 and AI — Part Two

Feb 11

Reversing a Prometei botnet binary with r2 and AI (Part One)

I’ve just laid my hands on a new malicious sample of February 2, 2025 (1 week ago). It is detected as Linux/Prometei.B. I’m going to…

Feb 7

Reversing a Prometei botnet binary with r2 and AI (Part One)

Feb 7

Cracking my own CrackMe with r2ai

Recently, I viewed the excellent “Cracking binaries with r2ai visual mode” by Daniel Nakov, at r2con 2024. In September 2024, I had tried…

Jan 6

Cracking my own CrackMe with r2ai

Jan 6

Creating inefficient IT, or hiding our own inefficiency behind IT

We, humans, normally have brains, and a heart, and we should use them more.

Oct 16, 2024

Oct 16, 2024

The Next Generation Conference Format

I have now been attending conference for … hum … several decades and I believe the traditional format of 30, 40 or 50-minute talks should…

Oct 4, 2024

Oct 4, 2024

@cryptax

@cryptax

Mobile and IoT malware researcher. The postings on this account are solely my own opinion and do not represent my employer.

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