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Avalon modular malware framework with CrownX ransomware

Malware Activity
First reported
Last updated
Happening score
H score 33
1 unique sources, 1 articles

Summary

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The Avalon malware framework was uncovered after a multi-stage phishing chain that can bypass traditional security controls and deliver credential theft plus ransomware execution on compromised Windows hosts. Its extortion component, CrownX, adds file encryption and recovery disruption. The framework also uses anti-forensic methods and C2 polling to make detection and response harder.

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Timeline

  1. 03.07.2026 21:55 2 articles · 6d ago

    Researchers uncover Avalon modular malware framework with CrownX ransomware

    Initial Disclosure

    Researchers disclosed Avalon, a previously undocumented modular malware framework delivered through a spoofed legal document email, a password-protected archive on Proton Drive, an ISO image, and a Windows Shortcut that launches MSBuild to deploy payloads. The framework combines credential collection, lateral movement, remote access, recovery disruption, ETW interference, anti-forensic cleanup, and ransomware execution through CrownX, with the final extortion stage encrypting business, software development, engineering, data storage, and virtual infrastructure files while threatening ransom increases over time.

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