Reverse engineering writeups from Google CTF, DEF CON, picoCTF, and other global competitions. Organized by year and event.
2025 Challenges
Google CTF 2025
Google CTF 2025
Easy
FlagChecker
Category: Reversing · Points: 110 · Solves: 541
A simple C++ binary that validates user input character-by-character using nested math equations. Extract the equations to calculate the flag.
picoCTF 2025
picoCTF 2025
Medium
Transformer
Category: Reversing · Points: 200 · Solves: 310
Obfuscated Python bytecode (.pyc). Decompile, analyze custom execution VM structure, and reverse the state mutations to retrieve the original input.