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
How BertLocker11 ransomware works
File encryption patterns
BertLocker11 modifies encrypted files using specific patterns to mark them as encrypted:
Ransom note and payment demands
After encrypting files, BertLocker11 displays ransom notes demanding payment for file recovery:
notes/.encryptedbybert11-decrypt.txt
About this analysis
This BertLocker11 ransomware analysis is part of Elastio's comprehensive ransomware detection database. Elastio provides advanced ransomware protection and recovery, helping organizations defend against and recover from ransomware attacks like BertLocker11.
Last updated: December 30, 2025
Elastio detects BertLocker11 inside your data and backups.
The Hunt Engine uses Deep File Inspection to identify BertLocker11 across live data, replicated data, and backups. If this family is in your environment, Elastio finds it before encryption completes. Run a scan against your recovery points to confirm.
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