reverseProeasy

Jerred

spbctf

Task: a PE32 Windows crackme asks for a serial key and reports only success or failure. Solution: disassembly shows the checker only accepts inputs of length 89, so any 89-character string is a valid serial.

windows pe32 x86 serial_validation length_check

input_length_validationstatic_disassembly

$ ls tags/ techniques/

windows pe32 x86 serial_validation length_check

input_length_validationstatic_disassembly

Analysis

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

Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

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