reversehard

One and a Half Rubles Clasp

hackerlab

Task: a nested reverse matryoshka starts with a damaged UPX-packed Rust ELF and unfolds through Go, Python bytecode, an x86-64 ELF, and a final Android AArch64 ELF. Solution: repair the packer, invert each checker, dump hidden payloads from memory, ignore fake flag bait, and continue to the last ARM stage for the real CODEBY flag.

$ ls tags/ techniques/

golang python_bytecode pyc upx rust fake_flag aarch64 android_elf staged_payload memory_dumping capybara archive_password

pyc_decompilationupx_header_repairchecker_inversionstaged_payload_extractionmemory_payload_dumpingarchive_password_recoveryaarch64_reverse_engineering

Analysis

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

$ 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.

🔒

Permission denied (requires tier.pro)

Sign in to access full writeups

Create a free account with GitHub to get started.

$ssh [email protected]