$ cat writeup.md…
$ cat writeup.md…
spbctf
Task: 12MB stripped PyInstaller ELF (Python 3.8) validating a flag via repeating-key XOR. Solution: extract with pyinstxtractor, decompile the 448-byte .pyc with decompyle3, then decrypt the hardcoded ciphertext using the flag prefix 'SPbCTF' which is itself the 6-byte XOR key.
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$sign in$ grep --similar