Ransomware Research
Kasiski Ransomware
Kasiski is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on February 1, 2017, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- Kasiski
- First Seen
- February 1, 2017
How Kasiski Ransomware Works
Targeted Files
Written in Python (PyInstaller) Requires C&C
Ransom Note and Payment Demands
After encrypting files, Kasiski displays ransom notes demanding payment for file recovery:
INSTRUCCIONES.txtRansom message:
notes/INSTRUCCIONES.txt
Note locations:
RansomPayloadStartFolderElastio Can Help You
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About This Analysis
This Kasiski 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 Kasiski.
Last updated: July 30, 2025