Ransomware Research
CXK-NMSL Ransomware
CXK-NMSL is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on July 1, 2019, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: ChineseBAT.
Quick Facts
- Ransomware Family
- CXK-NMSL
- First Seen
- July 1, 2019
- Known Aliases
- ChineseBAT
How CXK-NMSL Ransomware Works
File Encryption Patterns
CXK-NMSL modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..cxk_nmsl..cxkdataRansom Note and Payment Demands
After encrypting files, CXK-NMSL displays ransom notes demanding payment for file recovery:
CXK-NMSL-README.txtRansom message:
notes/CXK-NMSL-README.txt
Note locations:
EveryFolderCXK-NMSL-README.txt.exeNote locations:
EveryFolderTechnical Indicators
Associated Executable Files
The following executable files are associated with CXK-NMSL ransomware:
CXK-NMSL.batCXK-NMSL%20V2.0.batCXK-NMSL V2.0(1).batCXK-NMSL V2.0.bat1.batCXK-NMSL V3.1.batCXK-NMSL V3.2.batnyaa.batCXK-NMSL_V3.2.batxls.exe6985-f94d84da27bd095fdeaf08ed4f7d8c9a.zip
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About This Analysis
This CXK-NMSL 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 CXK-NMSL.
Last updated: July 30, 2025