Ransomware Research
CrossLock Ransomware
CrossLock is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on April 1, 2023, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- CrossLock
- First Seen
- April 1, 2023
How CrossLock Ransomware Works
Targeted Files
https://app.any.run/tasks/da22ed1d-708f-4942-a8ce-ff171687daf2/
File Encryption Patterns
CrossLock modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..crlkRansom Note and Payment Demands
After encrypting files, CrossLock displays ransom notes demanding payment for file recovery:
---CrossLock_readme_To_Decrypt---.txtRansom message:
notes/---CrossLock_readme_To_Decrypt---.txt
Note locations:
EveryFolderTechnical Indicators
Associated Executable Files
The following executable files are associated with CrossLock ransomware:
NotepadNOTEPAD.EXEcrosslock.exeteste.exe
Elastio Can Help You
Don't let CrossLock ransomware take over your data
Elastio provides advanced ransomware protection and recovery solutions to keep your organization safe.
About This Analysis
This CrossLock 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 CrossLock.
Last updated: July 30, 2025