Riscure RHme2 is finally over! What a marathon CTF. I actually spent a tonne of time on this CTF over the past few months, mainly because I had never looked at embedded hardware systems in the past. So I had to gain my skills from never having even used Arduino to performing side channel analysis and fault injection, reverse engineering 8 bit microcontroller binaries, and dealing with ever increasing lust for more and better hardware hacking tools!
The second mobile reversing challenge of BSides SF CTF. Slightly harder than the first but only just. Here’s the clue and APK:
Quick challenge for a quick 250 points. So hopefully a quick writeup! Here’s the clue:
HackIM time again. This year seemed slightly better organized than last year. Some nice challenges. I don’t think this challenge was worth 350 points but I’ll document my solution anyway in sort of a “what not to do” when making a crypto challenge. Here’s the clue including the image they gave as a description: