$ cat writeup.md…
$ cat writeup.md…
rev_kids20
Task: 32-bit stripped PIE ELF flag checker. memfrob in the import table obfuscates input with XOR 0x2A before comparing to a stack-built constant. Solution: recover the 27-byte target via radare2 and XOR each byte with 0x2A (memfrob is self-inverse) to recover the flag without running the binary.
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