reverseProeasy

Jaakko

sbpctf

Task: a PE32 crackme asks for a valid serial and contains an interesting embedded string in .rdata. Solution: reverse the validation routine, observe how it swaps two halves around an inserted underscore, and recover the serial REDACTED.

static_analysis strings crackme windows_pe serial_check

byte_by_byte_comparisonstatic_analysisstring_reconstruction

$ ls tags/ techniques/

static_analysis strings crackme windows_pe serial_check

byte_by_byte_comparisonstatic_analysisstring_reconstruction

Analysis

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$ python3 exploit.py --target 192.168.1.1 --port 8080
[*] Connecting to target...
[+] Shell obtained!

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