Ransomware Research
CryptoBoss Ransomware
CryptoBoss is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on May 1, 2017, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- CryptoBoss
- First Seen
- May 1, 2017
How CryptoBoss Ransomware Works
Targeted Files
NOSAMPLE
File Encryption Patterns
CryptoBoss modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..CRYPTOBOSSRansom Note and Payment Demands
After encrypting files, CryptoBoss displays ransom notes demanding payment for file recovery:
HOW TO RECOVER ENCRYPTED FILES.TXTRansom message:
notes/HOW TO RECOVER ENCRYPTED FILES.TXT
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About This Analysis
This CryptoBoss 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 CryptoBoss.
Last updated: July 30, 2025