Ransomware Research
Cyspt Ransomware
Cyspt is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on January 1, 2019, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- Cyspt
- First Seen
- January 1, 2019
How Cyspt Ransomware Works
File Encryption Patterns
Cyspt modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..OOFNIKRansom Note and Payment Demands
After encrypting files, Cyspt displays ransom notes demanding payment for file recovery:
Ransom message:
notes/note.txt
Note locations:
OnceOnCompletionTechnical Indicators
Associated Executable Files
The following executable files are associated with Cyspt ransomware:
arescrypt.exe
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About This Analysis
This Cyspt 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 Cyspt.
Last updated: July 30, 2025