2024-12-15 by Yannik Marchand
Last weekend, I played the HackTheBox University CTF with StudSec. More than 8,000 players signed up for this CTF. This writeup explain how I solved the Gravitometer Gambit challenge during the CTF. Even though it was a hard reverse engineering challenge, I solved it only 4.5 hours after … Read more...
CTF
2024-11-08 by Yannik Marchand
Lolcat was a reverse engineering challenge during the International Cybersecurity Challenge of 2024. It remained unsolved during the competition, but I was able to solve it afterwards. This writeup explains how I solved it. If you would like the try the challenge yourself, you can download it here. Initial Analysis … Read more...
CTF
2024-05-21 by Yannik Marchand
Localo, one of the coaches of the German ECSC team, created a reversing challenge for the ICC Team Europe qualifiers this year. This writeup explains how I solved it. If you would like to try this challenge yourself, you can download the challenge here. Initial Analysis Understanding the Pattern Writing … Read more...
CTF
2024-05-01 by Yannik Marchand
This writeup explains how I solved the Argonauts challenge during the CSCG qualifiers of 2024. Name: Argonauts Category: Pwn Difficulty: Hard Description: What a lovely emulator. It'd be a shame if anything were to happen to it. (I'm joking. Go break it. Here's the source code.) In the Argonauts challenge … Read more...
CTF
2024-03-14 by Yannik Marchand
Last weekend I played the Cyber Apocalypse CTF with VUBar. More than 12,000 players signed up for this CTF and it featured 67 challenges across 8 categories. The difficulty level ranged from very easy to insane. During this CTF, I was the first person that solved the insane reversing … Read more...
CTF