Ransomware Research
BertLocker11 Ransomware
BertLocker11 is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on May 1, 2025, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- BertLocker11
- First Seen
- May 1, 2025
How BertLocker11 Ransomware Works
File Encryption Patterns
BertLocker11 modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..encryptedbybert11Ransom Note and Payment Demands
After encrypting files, BertLocker11 displays ransom notes demanding payment for file recovery:
.encryptedbybert11-decrypt.txtRansom message:
notes/.encryptedbybert11-decrypt.txt
Note locations:
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About This Analysis
This BertLocker11 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 BertLocker11.
Last updated: September 30, 2025
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