Ransomware Research
Euclid Ransomware
Euclid is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on June 1, 2019, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- Euclid
- First Seen
- June 1, 2019
How Euclid Ransomware Works
Targeted Files
NOSAMPLE
File Encryption Patterns
Euclid modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..euclidRansom Note and Payment Demands
After encrypting files, Euclid displays ransom notes demanding payment for file recovery:
how to recover.txtRansom message:
notes/how to recover.txt
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About This Analysis
This Euclid 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 Euclid.
Last updated: July 30, 2025