Ransomware Research
BlueLocker Ransomware
BlueLocker is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on November 1, 2021, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: BlueCryptor.
Quick Facts
- Ransomware Family
- BlueLocker
- First Seen
- November 1, 2021
- Known Aliases
- BlueCryptor
How BlueLocker Ransomware Works
File Encryption Patterns
BlueLocker modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..blueRansom Note and Payment Demands
After encrypting files, BlueLocker displays ransom notes demanding payment for file recovery:
restore_file.txtRansom message:
notes/restore_file.txt
Note locations:
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About This Analysis
This BlueLocker 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 BlueLocker.
Last updated: July 30, 2025