$ cat writeup.md…
$ cat writeup.md…
tamuctf
Task: Stripped 64-bit ELF with VM-based obfuscation, anti-debugging (TracerPid, LD_PRELOAD, .text integrity), hash-chain dispatch, and self-modifying code. Solution: Deep static analysis of flag validation function revealed rolling hash with TEA-like constants; brute-forced each character position against hardcoded lookup tables.
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