Ransomware Research
CSP Ransomware
CSP is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on February 1, 2019, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- CSP
- First Seen
- February 1, 2019
How CSP Ransomware Works
Targeted Files
NOSAMPLE
File Encryption Patterns
CSP modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
._csp..wav_listRansom Note and Payment Demands
After encrypting files, CSP displays ransom notes demanding payment for file recovery:
/^HOW TO DECRYPT\[\w{5}\]\.txt$/Ransom message:
notes/HOW TO DECRYPT[1T0tO].txt
Elastio Can Help You
Don't let CSP ransomware take over your data
Elastio provides advanced ransomware protection and recovery solutions to keep your organization safe.
About This Analysis
This CSP 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 CSP.
Last updated: July 30, 2025