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(Reverse - FCSC 2025) Transient Protector
TL;DR: Obfuscation of a logic circuit using Spectre-like mechanisms based on speculative code execution. Description: Our supplier claims he just developped a new and revolutionnary protector for our software’s DRM. Here is a sample keygenme protected with its method. I heard that no DRM is unbreakable. Would you be able...
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(Reverse - FCSC 2025) Nessie
TL;DR: Reverse engineering of a NES (Nintendo Entertainment System) ROM. Description: A friend of yours, in his forties, spent his carefree youth playing a game called Nessie. He never managed to finish the game despite having spent long hours in front of his NES. Will you be able to do...
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(Pwn - Root-Xmas Challenge 2024) - Day 23 - Gift Control Interface
TL;DR: Unicorn sandbox escape, heap out-of-bounds read/write in MMIO interface. This challenge was part of the Root-Xmas Challenge which was organized by Root-Me. This event was an Advent Calendar made with CTF challenges. Description: This year, to easily handle people’s Christmas lists, the elves teamed up to develop a cutting-edge...