$ cat writeup.md…
$ cat writeup.md…
spbctf
Task: x86-64 C++ ELF where main instantiates a no-op BadGuy and PrintFlag dispatches Decode through the vtable; the real flag decryptor GoodGuy::Decode is OLLVM-obfuscated. Solution: patch the constructor call in main to GoodGuy::GoodGuy so virtual dispatch invokes the real decryptor, then run the binary.
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