Those 2 challenges had already been flagged by a team mate when I started working on the CTF. But, during the CTF, at a time when I was getting frustrated not to flag other challenges, I decided to do them again on my own lol. Both challenges are very beginner friendly. Just Read Description This challenge is in the Reverse category, with a simple description “Find a way to break this” and an executable main is provided.

In this challenge at Insomni’hack CTF, you get an Android application (apk) to analyze. Had to look at that, obviously 😉. The challenge was solved as team work with 2 other team mates from Soudure au Beurre. Update April 20, 2024: PKCS7 and PKCS5 are basically the same. Corrected the explanation. Understanding the Android application In this challenge, you get an Android application. I decompile it to find a pretty simple application with 2 classes: MainActivity and Part1.

HackMe Hardware Challenges - Nullcon Berlin CTF 2024 The 6 challenges below use the same PCB. Update March 16, 2024: I forgot another fix we had to do for the first challenge + added solution to the last HackMe challenges. HackMe Fix the Board (5 solves) The PCB we are given does not work as such: the screen does not light up and the device does not boot correctly. We’ve got to repair it.