reverseeasy

crackme1

spbctf

Task: C source code of XOR chain encoder provided with encoded flag file. Solution: Reverse the XOR chain encoding by XORing each byte with the previous byte (starting with 0x7f).

$ ls tags/ techniques/

c xor_chain encoder_decoder file_decode source_code

source_code_analysisxor_chain_decode

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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