Ransomware Research
BlackSheep Ransomware
BlackSheep 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
- BlackSheep
- First Seen
- May 1, 2017
How BlackSheep Ransomware Works
File Encryption Patterns
BlackSheep modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..666Ransom Note and Payment Demands
After encrypting files, BlackSheep 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 BlackSheep ransomware:
BLACKSHEEP.exe
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About This Analysis
This BlackSheep 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 BlackSheep.
Last updated: July 30, 2025