Ransomware Research
Louis Ransomware
Louis is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on March 1, 2025, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- Louis
- First Seen
- March 1, 2025
How Louis Ransomware Works
File Encryption Patterns
Louis modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..LouisRansom Note and Payment Demands
After encrypting files, Louis displays ransom notes demanding payment for file recovery:
Louis_Help.txtRansom message:
notes/Louis_Help.txt
Note locations:
EveryFolderRansom message:
notes/1.png
Note locations:
DesktopTechnical Indicators
Associated Executable Files
The following executable files are associated with Louis ransomware:
focx.exe.noejecutar
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About This Analysis
This Louis 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 Louis.
Last updated: July 30, 2025