$ cat writeup.md…
$ cat writeup.md…
spbctf
Task: x86-64 ELF crackme whose main is bloated with opaque predicates that conditionally XOR single bits into a scanf'd integer before a final compare. Solution: recognize the maze is dead code, read the gate value 0x7f89409, and seed it into the rol32/XOR keystream decrypt loop to recover the flag directly.
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