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CyberSmash

Various topics from software development to Reverse Engineering and vulnerability research

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DEFCON 25 HHV Challenge - Part 3: The Firmware

The Firmware After several iterations I was able to get a complete disassembly of the firmware. My disassembler doesn’t disassemble every single instruction in the ISA, but it disassembles all the instructions in this firmware. If you really want it, or just want to see how it works, you can find it here . I don’t make any claims about its code quality. It started off as a “quick test” and then…

DEFCON 25 HHV Challenge - Part 1: Initial Investigation

Disclaimer: My (not so) Illustrious career in Hardware RE Many people don’t know this about me, but I can do hardware reverse engineering, although I hide this fact. The reason is that I can do it but I’m shitty at it. Traditionally, I’m a software reverse engineer (hell, I have a Computer Science Degree). I’ve looked at everything from desktop application software to embedded firmware. I’ve…

DEFCON 25 HHV Challenge - Part 2: Hardware Hacking

Extracting the Firmware At this point I tried several things such as holding down different buttons at boot up to see if we could enable the debugging output, but this had no effect. At this point I decided that I needed to see if I could dump the firmware. Sometimes getting firmware off ROM on a microcontroller can be a really difficult task. Luckily, after looking through the datasheet of the…

Raytheon CTF Business Card

Raytheon CTF

Reverse Engineering Night Raid

Night Raid

Exploring Rust RE pt. 1

Introduction