Ransomware Research
Medusa Stealer Ransomware
Medusa Stealer is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on October 1, 2022, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- Medusa Stealer
- First Seen
- October 1, 2022
How Medusa Stealer Ransomware Works
Targeted Files
NOSAMPLE
File Encryption Patterns
Medusa Stealer modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..medusastealerRansom Note and Payment Demands
After encrypting files, Medusa Stealer displays ransom notes demanding payment for file recovery:
Ransom message:
notes/note.txt
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About This Analysis
This Medusa Stealer ransomware analysis is part of Elastio's comprehensive ransomware detection database. Elastio provides advanced ransomware protection and recovery solutions, helping organizations defend against and recover from ransomware attacks like Medusa Stealer.
Last updated: July 30, 2025