Ransomware Research
CypherPy Ransomware
CypherPy is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on September 1, 2017, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- CypherPy
- First Seen
- September 1, 2017
How CypherPy Ransomware Works
Targeted Files
Written in Python
File Encryption Patterns
CypherPy modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..crypt..encRansom Note and Payment Demands
After encrypting files, CypherPy displays ransom notes demanding payment for file recovery:
READMERansom message:
notes/README
Note locations:
Desktopreadme_decrypt.txtTechnical Indicators
Associated Executable Files
The following executable files are associated with CypherPy ransomware:
cyphermain.py
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About This Analysis
This CypherPy 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 CypherPy.
Last updated: July 30, 2025