See No Evil - Part 4

ringzer0ctf

Task: reverse the 4th level of a 5-part PE32+ Windows binary (RingZer0 'See No Evil') and recover Part 4's flag without running the anti-debug gate. Solution: statically read the slot-index-3 magic (disambiguated by imul rax,rax,3), derive the DES key as MD5(magic)[:8] via CryptoAPI semantics, and DES-ECB decrypt the embedded 40-byte ciphertext.