Ransomware Research
Cyclone Ransomware
Cyclone is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on December 1, 2017, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- Cyclone
- First Seen
- December 1, 2017
How Cyclone Ransomware Works
Targeted Files
https://app.any.run/tasks/e9c3dc9b-7717-4a90-af71-1c7d6e661ef7/ Written in Python 2.7 (PyInstaller 2.1+)
File Encryption Patterns
Cyclone modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..CycloneRansom Note and Payment Demands
After encrypting files, Cyclone displays ransom notes demanding payment for file recovery:
Ransom message:
notes/note.txt
Note locations:
LoginTechnical Indicators
Associated Executable Files
The following executable files are associated with Cyclone ransomware:
Crypter.exe
Elastio Can Help You
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About This Analysis
This Cyclone 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 Cyclone.
Last updated: July 30, 2025