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Author:
Hydra14212
Language:
C/C++
Upload:
2026-08-22 11:55
Platform:
Windows
Difficulty:
3.5
Quality:
2.5
Arch:
x86-64
Downloads:
43
Size:
247.50 KB
Writeups:
0
Comments:
0
Description
HYDRA VAULT is a Windows x64 usermode crackme in a “loader armor” style, not a toy strcmp keycheck. Goal ---- Run the binary, read CHALLENGE (and TOKEN / epoch as shown), compute a 32-hex KEY, get ACCESS GRANTED. Patching the jump to fake a win is possible but lame. Please say so if you did. Intended solution is a working keygen or faithful emulation of the crypto path. Rules / design -------------- - No anti-VM / anti-sandbox on purpose. - Usermode only (not kernel). - Keys are time-scoped: the crypto universe rotates about every 30 seconds. - A wrong KEY is not a free hash grind: fail count rebinds VM masks, XOR lanes and AES material. RAM dumps of a previous attempt go stale (scrub + reseed). What you will hit ----------------- - Packed outer stub (custom, not UPX/Themida) dropping an inner PE - Dynamic API resolve (do not trust a clean IAT on the inner image) - TLS callbacks minting state before main - Dual custom VMs (shuffled handler tables, nested mini-VM, fake opcodes, overlapping virtual registers) - AES inside the VM, stage-sealed bytecode - Control-flow flattening / dispatcher / junk states - RDTSC dwell/single-step silent derail (wrong key, no “debugger” banner) - Self-debug guardian (external attach is hostile) - Honeypot exports and plaintext bait (VerifyLicenseKey / ACCESS GRANTED in the binary is not the real win) - Anti-debug / anti-attach / integrity / anti-dump / Anti-MCP (IDA MCP bridges) Attach: HydraVault.exe only. Spoiler solutions in the write-up, please. Good luck.
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