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Author:
sally1337
Language:
C/C++
Upload:
1:58 PM 12/22/2025
Platform
Windows
Difficulty:
5.0
Quality:
4.0
Arch:
x86-64
Description
NEXUSCORE - VERY HARD CRACKME CHALLENGE !! GOT IT? CONTACT ME ON DC (id1500) OBJECTIVE: Find the correct password to authenticate into NexusCore and retrieve the FLAG. PROTECTIONS: • Custom Virtual Machine - Password validation logic is executed inside an encrypted VM • Anti-Debug - Multiple debugger detection mechanisms throughout execution • Anti-Bruteforce - Limited attempts with exponential backoff delays • Code Obfuscation - Opaque predicates, junk code, runtime transformations • Timing Checks - Execution must complete within specific time constraints WHAT YOU NEED TO DO: 1. Reverse engineer the custom VM implementation 2. Understand the bytecode encryption/decryption mechanism 3. Bypass or analyze the anti-debug protections 4. Either: a) Generate the correct password using a keygen (requires understanding the algorithm) b) Patch the binary to skip validation c) Emulate/instrument the VM to find the correct password 5. Enter the password and retrieve the flag: NEXUSCORE{VM_MASTERED} GOOD LUCK, HACKER!