Ransomware Research
Joker Korean Ransomware
Joker Korean is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on September 1, 2020, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- Joker Korean
- First Seen
- September 1, 2020
How Joker Korean Ransomware Works
Targeted Files
377b8b0ee6a332b873f15ac1be1016e05f2ab2105352aa8282a3919dca69bde7 -> clickme.bat , should be stored in Users/%USER%/AppData/ Only renames files. Probably that is why the modify date will not change
File Encryption Patterns
Joker Korean modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..jokerRansom Note and Payment Demands
After encrypting files, Joker Korean displays ransom notes demanding payment for file recovery:
Ransom message:
notes/note.txt
Note locations:
LoginTechnical Indicators
Associated Executable Files
The following executable files are associated with Joker Korean ransomware:
ransom.execlickme.bat
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About This Analysis
This Joker Korean 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 Joker Korean.
Last updated: July 30, 2025