Ransomware Research
NotRansomCryptoLock Ransomware
NotRansomCryptoLock is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on December 1, 2021, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: NotRansom CryptoLock, NRCL.
Quick Facts
- Ransomware Family
- NotRansomCryptoLock
- First Seen
- December 1, 2021
- Known Aliases
- NotRansom CryptoLockNRCL
How NotRansomCryptoLock Ransomware Works
Targeted Files
doesn’t crypt D drive
File Encryption Patterns
NotRansomCryptoLock modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..NRCLRansom Note and Payment Demands
After encrypting files, NotRansomCryptoLock displays ransom notes demanding payment for file recovery:
note.txtRansom message:
notes/note.txt
Note locations:
DesktopTechnical Indicators
Associated Executable Files
The following executable files are associated with NotRansomCryptoLock ransomware:
NotRansom_CryptoLock_Dropper.exe
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About This Analysis
This NotRansomCryptoLock 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 NotRansomCryptoLock.
Last updated: July 30, 2025