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