All Writeups

Comprehensive collection of CTF challenges, solutions, and insights.


Filter by tag:

Raptor Weekly 2 - ECHELON Rev 1 - 4.1 ; REMNANT

Reversing a stripped x86-64 ELF to recover Diffie-Hellman parameters with a smooth group order, applying Pohlig-Hellman to recover the private key, and decrypting a C2 beacon payload to extract a handshake key and the flag. Or just running the binary.