Ransomware Research
ChinaJm Ransomware
ChinaJm is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on February 1, 2020, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- ChinaJm
- First Seen
- February 1, 2020
How ChinaJm Ransomware Works
Targeted Files
Chinese seembols in the ransom notes filenames
File Encryption Patterns
ChinaJm modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..ChinaRansom Note and Payment Demands
After encrypting files, ChinaJm displays ransom notes demanding payment for file recovery:
/.{13,15}[0-9]{13}.txt$/Ransom message:
notes/ÁªÏµÎÒ,ÇëÎðɾ³ý1625650100797.txt
Note locations:
EveryFolderTechnical Indicators
Associated Executable Files
The following executable files are associated with ChinaJm ransomware:
简易抽奖小程序-SIGN.exe
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About This Analysis
This ChinaJm 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 ChinaJm.
Last updated: July 30, 2025