Vladmodelsy095alina44 2021 (2K)

The program stops on the first (and only) call to strcmp . Inspect the arguments:

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| What we learned | Why it matters | |-----------------|----------------| | – The program deliberately uses argv[0] as the XOR key. This is a classic “security through obscurity” trick that forces the attacker to keep the original file name intact. | When reversing, always check whether the binary name (or other external metadata) is used in crypto or checksums. | | Stripped binaries still contain data sections – Even though the binary had no symbols, the encrypted blob was visible in the .rodata section. | Dumping sections ( objdump -s , readelf -S , xxd ) is a quick way to locate hidden data. | | Dynamic tracing to locate the comparison – Breaking on strcmp gave us the exact address of the expected value. | In a stripped binary, static analysis alone can be tedious; a short dynamic trace often points you to the right function. | | Simple XOR – The encryption is just a byte‑wise XOR with a repeating key. Once you recognise the pattern, the problem collapses to a few lines of Python. | Many “crypto” challenges are just XOR or Caesar ciphers masquerading as “hard”. Recognise the patterns early. | The program stops on the first (and only) call to strcmp

How would you refine this for a specific audience (e.g., art lovers, tech enthusiasts, etc.)? Let me know! 🎨💻 This is a classic “security through obscurity” trick

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Dump the second buffer (the “expected” value):