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Cyber Security
Independent · Digital
Thehackingpost
CybersecurityAI-assisted

VVS Stealer Attacking Discord Users to Exfiltrate Credentials and Tokens

## Overview of VVS Stealer Malware Targeting Discord Users

Overview of VVS Stealer Malware Targeting Discord Users

Discord users are currently facing a threat from VVS Stealer, a Python-based malware designed to extract sensitive account data such as credentials and tokens.

VVS Stealer is distributed via PyInstaller as a package and employs Pyarmor version 9.1.4 (Pro) to obscure its code, complicating detection by security tools. The malware targets Discord data, intercepts active sessions, and extracts web browser information, including cookies, passwords, browsing history, and autofill details.

The malware initiates data collection upon execution, gathering Discord tokens, account information, payment methods, user IDs, and more. It checks for two-factor authentication and sends the data to attackers via Discord webhooks. Additionally, it kills any running Discord processes and injects a harmful JavaScript payload into the Discord application directory.

VVS Stealer affects multiple web browsers, including Chrome, Firefox, Edge, Brave, Opera, and Yandex. It extracts autofill data, cookies, browsing history, and saved passwords, compressing this information into a ZIP file for exfiltration to predefined endpoints.

The malware initiates data collection upon execution, gathering Discord tokens, account information, payment methods, user IDs, and more.
Mark Jensen · Thehackingpost

The malware ensures persistence by copying itself to the Windows Startup folder, enabling it to activate every time the system starts.

Technical Breakdown of the Infection Mechanism

The analyzed malware sample has the SHA-256 hash c7e6591e5e021daa30f949a6f6e0699ef2935d2d7c06ea006e3b201c52666e07 and is set to expire after October 31, 2026. It uses PyInstaller to compile Python code into an executable file. Key components extracted include the Python bytecode file vvs and the Pyarmor runtime DLL file pyarmor_runtime.pyd .

VVS Stealer employs AES-128-CTR encryption with specific keys and values for operational concealment. The encryption key 273b1b1373cf25e054a61e2cb8a947b8 and nonce XOR key 2db99d18a0763ed70bbd6b3c are pivotal in its encryption process.

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All network requests are characterized by the fixed User-Agent string: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/115.0.0.0 Safari/537.36 . The malware searches for encrypted Discord tokens in .ldb or .log files, decrypting them using the Windows Data Protection API.

Based on reporting by Cyber Security News.

AI transparency. This article was produced with the assistance of artificial intelligence and published under human editorial oversight. AI systems can make mistakes. Read how we use AI (EU AI Act, Art. 50).
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