reversePromedium

По дороге к Замку Капибар (On the Road to Capybara Castle)

hackerlab

Task: UPX-packed ELF binary with corrupted magic bytes and sequential arithmetic/XOR obfuscation. Solution: Repair UPX header by replacing CDB! with UPX!, unpack, extract target bytes from .data section, and reverse 25 sequential operations.

$ ls tags/ techniques/
static_analysisxorobfuscationupxanti_unpackingheader_repairelf_binarysequential_operationsarithmetic_cipher
Static binary analysis with objdumpUPX header repair (anti-unpacking bypass)Reverse engineering of obfuscation algorithmCryptographic operation reversal
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