Ransomware Research
ChaosLocker Ransomware
ChaosLocker is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on June 1, 2025, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- ChaosLocker
- First Seen
- June 1, 2025
How ChaosLocker Ransomware Works
File Encryption Patterns
ChaosLocker modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..chaosRansom Note and Payment Demands
After encrypting files, ChaosLocker displays ransom notes demanding payment for file recovery:
READ_IT.txtRansom message:
notes/READ_IT.txt
Note locations:
EveryFolderTechnical Indicators
Associated Executable Files
The following executable files are associated with ChaosLocker ransomware:
chaos_polymorphic_v5_4.exe
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About This Analysis
This ChaosLocker 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 ChaosLocker.
Last updated: October 30, 2025
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