crackmes.one

codergithub's VBO-Vanguard: ARM64 Virtual Machine & ARX Challenge

Author:
codergithub

Language:
C/C++

Upload:
2026-08-27 04:33

Platform:
Mac OS X

Difficulty:
4.0

Quality:
4.0

Arch:
ARM

Downloads:
39

Size:
33.14 KB

Writeups:
0

Comments:
1

Description

Welcome to VBO-Vanguard! This is an educational ARM64 (Apple Silicon macOS) reverse engineering challenge protected with: - Custom Direct-Threaded Code Virtualization (VBO) - Control-Flow Flattening (CFF with 260+ dispatch blocks) - Non-Linear Mixed Boolean-Arithmetic (MBA Depth 4) - Dynamic in-memory string decryption & Nanomite signal trapping - 0 plaintext strings and completely stripped symbol table. [Goal] Find the valid input key to unlock the secret internal flag. [Usage] ./crackme <FLAG-KEY> Example format: ./crackme FLAG-XXXX-XXXX-XXXX-XXXX

Labels ?

Anti-debugging Timing (rdtsc/GetTickCount) Hardware breakpoints (DRx) String / data encryption XOR Substitution / table Self-modifying / runtime decrypt Code virtualization / VM Control-flow obfuscation Exception / interrupt-based Indirect / computed jumps & calls State machine / dispatcher Control-flow flattening (CFF) Anti-disassembly Junk / garbage bytes Opaque predicates Jump-based desync Anti-tamper / integrity Custom / generic obfuscation