crackmes.one

-
Search Latest Faq Discord Blog CTF Login Register

crackmes.one

werrec's VAULT: Nested Helix

Author:
werrec

Language:
C/C++

Upload:
2026-09-20 11:41

Download

Platform:
Windows

Difficulty:
6.0

Quality:
4.0

Arch:
x86-64

Downloads:
41

Size:
139.50 KB

Writeups:
0

Comments:
1

Description

A custom-protected Windows x64 reverse engineering challenge. Goal: Breach the vault, find the valid serial to unlock it, and retrieve the flag. Rules: - Strictly no patching. The valid serial must be accepted by the untouched executable. - Writing custom unpackers, scripts, or emulators is strongly encouraged. Can you unlock the vault? Good luck!

Labels ?

Anti-debugging IsDebuggerPresent Timing (rdtsc/GetTickCount) PEB BeingDebugged / NtGlobalFlag INT3 / 0xCC breakpoint scan Exception-based (SEH/VEH/INT2D) Hardware breakpoints (DRx) NtQueryInformationProcess CheckRemoteDebuggerPresent TLS callback Anti-dump Anti-attach / thread suspension String / data encryption XOR Substitution / table Packer Self-modifying / runtime decrypt Crypto / hash algorithm SHA-256 Other / custom hash Code virtualization / VM Control-flow obfuscation Exception / interrupt-based Indirect / computed jumps & calls State machine / dispatcher Control-flow flattening (CFF) Anti-disassembly Malformed PE / bad bytes (UD2) Opaque predicates Anti-tamper / integrity Import / API obfuscation Custom / generic obfuscation