general🌐InternationalUnit 42
VVS Stealer Leverages Pyarmor for Obfuscated Discord Data Theft
Friday, January 2, 2026
What
VVS stealer is a Python-based malware that targets Discord users and web browser data, including credentials, tokens, and browsing history. Its use of Pyarmor obfuscation significantly hinders static analysis and signature-based detection, making it a stealthy and effective threat.
Where
Discord platform and various web browsers are affected.
When
The malware was in active development and marketed for sale on Telegram as early as April 2025.
Key Factors
- •VVS stealer leverages Pyarmor version 9.1.4 Pro to obfuscate its Python code, complicating reverse engineering and enabling evasion of traditional cybersecurity tools.
- •The malware is distributed as a PyInstaller package, requiring analysts to extract Python bytecode and restore the Python 3.11.5 magic number for successful decompilation using tools like Pycdc.
- •Beyond data theft, VVS stealer achieves persistence on startup, intercepts active Discord sessions via injection, and operates stealthily by displaying fake error messages and capturing screenshots.
Takeaways
- →Organizations should implement advanced endpoint detection and response (EDR) solutions capable of behavioral analysis to counter highly obfuscated Python malware like VVS stealer.
- →Users should be vigilant against suspicious links and files, and employ multi-factor authentication (MFA) on Discord and other critical accounts to mitigate credential theft risks.
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