Deadbeef

rev_kids20

Task: tiny hand-written MASM PE32 console binary reads input and prints OK/NO based on a ror/rol/xor transform of the first dword compared to a magic constant. Solution: follow IAT thunks to recover the Win32 I/O pattern, extract the transform and compare constant 0x395547a2, then brute-force all 2^32 inputs in C since X is used on both sides; printable solution 0x49684179 = little-endian 'yAhI'.