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Comprehensive collection of CTF challenges, solutions, and insights.


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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.

WHAMazon! Rev 2 - Armor

Identifying a PyArmor v9.x protected Python script, generating the correct runtime to execute it, and extracting a base64-encoded flag from the crash dump it writes to disk.