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