Posts
A la recherche du wapiti ⭐⭐⭐
Reading time: 15 minutes
A write-up of the FCSC 2026 3-star challenge “A la recherche du wapiti”. The challenge involves reverse engineering an ESP32-C3 firmware, understanding the WAPI protocol, and decrypting Wi-Fi traffic to recover a flag.
Spaghetti Badge ⭐⭐⭐
Reading time: 16 minutes
A write-up of the FCSC 2026 3-star challenge “Spaghetti Badge”. The challenge involves reverse engineering a WCH CH32V003F4U6 microcontroller firmware, understanding the spaghetti wiring of the WS2812B LED matrix, showing the layout of the LEDs to reveal the flag.