Ransomware Research
CryptoCat Ransomware
CryptoCat is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on September 1, 2016, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- CryptoCat
- First Seen
- September 1, 2016
How CryptoCat Ransomware Works
Targeted Files
NOSAMPLE
File Encryption Patterns
CryptoCat modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..cryptocatRansom Note and Payment Demands
After encrypting files, CryptoCat displays ransom notes demanding payment for file recovery:
Your files are locked !.txtRansom message:
notes/Your files are locked !.txt
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About This Analysis
This CryptoCat 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 CryptoCat.
Last updated: July 30, 2025