reverseProhard

War Hymn

tamuctf

Task: Multi-layer encrypted ELF with anti-debugging, embedded War Hymn lyrics as XOR key, zlib-compressed inner SO. Solution: Rolling checksum XOR decryption with lyrics key, zlib decompress, RC4 decrypt with 'AggiesAggiesAggies' key, identify real flag among decoy blocks.

$ ls tags/ techniques/

xor rc4 elf stripped_binary zlib anti_debugging memfd_create custom_elf_sections multi_layer_encryption embedded_payload dynamic_loading

zlib_decompressionrolling_checksum_xorrc4_decryptionin_memory_elf_loadingcustom_section_analysisdecoy_data_identification

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

$sign in

$ grep --similar

Similar writeups

[reverse][Pro]Challenge7— tamuctf
[reverse][Pro]interpreter-required— dicectf_2026
[crypto][Pro]CryBaby— grodno_new_year_2026
[crypto][Pro]Anime Track Cipher— hackerlab
[reverse][Pro]Deceptive Checker— miptctf