Hack.lu CTF 2025 I played this CTF in a different way: very relaxed, only looked at 4 challenges I was interested in, solved 3 ;P and nearly 4… Did not even peek at the other challenges (see Conclusion about that). All challenges at Hack.Lu were organized as if they were items in an IKEA shop, including their names: MANUAL: I flagged this crypto challenge entirely with ChatGPT. I didn’t even need to understand it.

BruCON 2025 ICS Hacking Village The ICS Hacking Village at BruCON 2025 was offering a cool challenge, where water flow in Hacktopia city was malfunctioning because of a cyber attack. The goal of the challenge was to stop the overflow in a water tower and re-open water from a secondary water tank for water to flow again in the building. Each participant was supplied with a control box consisting of a M5 Core connecting to a few sensors, buttons, potentiometers, and connected to a water tank.

Qiling Workshop I followed the Qiling Workshop of Ph0wn Labs #3, by Blackb0x_ For environment setup, I used the Docker container provided on the GitHub link. Qiling is installed in /opt, and there are several root filesystems in /rootfs. There were 2 challenges: one Linux, one Windows. Both challenges can be solved in multiple ways, for example with static analysis, but the goal of this workshop was to use Qiling to solve.