Angry1

spbctf

Task: not-stripped x86-64 C crackme that reads 36 bytes and checks each byte independently against a hard-coded constant via a short affine arithmetic chain, calling exit(0) on any mismatch. Solution: parse objdump of main into 36 per-byte check blocks, emulate the register-level x86-64 arithmetic (including compiler magic-constant signed division), and brute-force each byte 0..255 for the printable solution.