Ransomware Research
Wooly Ransomware
Wooly is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on August 1, 2017, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: WoolyBear.
Quick Facts
- Ransomware Family
- Wooly
- First Seen
- August 1, 2017
- Known Aliases
- WoolyBear
How Wooly Ransomware Works
File Encryption Patterns
Wooly modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..woolyTechnical Indicators
Associated Executable Files
The following executable files are associated with Wooly ransomware:
Ransom.exe
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About This Analysis
This Wooly 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 Wooly.
Last updated: July 30, 2025