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
How CXK-NMSL ransomware works
File encryption patterns
CXK-NMSL modifies encrypted files using specific patterns to mark them as encrypted:
Ransom note and payment demands
After encrypting files, CXK-NMSL displays ransom notes demanding payment for file recovery:
notes/CXK-NMSL-README.txt
Technical indicators
Associated executable files
The following executable files are associated with CXK-NMSL ransomware:
- CXK-NMSL.bat
- CXK-NMSL%20V2.0.bat
- CXK-NMSL V2.0(1).bat
- CXK-NMSL V2.0.bat
- 1.bat
- CXK-NMSL V3.1.bat
- CXK-NMSL V3.2.bat
- nyaa.bat
- CXK-NMSL_V3.2.bat
- xls.exe
- 6985-f94d84da27bd095fdeaf08ed4f7d8c9a.zip
About this analysis
This CXK-NMSL ransomware analysis is part of Elastio's comprehensive ransomware detection database. Elastio provides advanced ransomware protection and recovery, helping organizations defend against and recover from ransomware attacks like CXK-NMSL.
Last updated: December 30, 2025
Elastio detects CXK-NMSL inside your data and backups.
The Hunt Engine uses Deep File Inspection to identify CXK-NMSL across live data, replicated data, and backups. If this family is in your environment, Elastio finds it before encryption completes. Run a scan against your recovery points to confirm.
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