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
Ransom note and payment demands
After encrypting files, Kasiski displays ransom notes demanding payment for file recovery:
notes/INSTRUCCIONES.txt
About this analysis
This Kasiski ransomware analysis is part of Elastio's comprehensive ransomware detection database. Elastio provides advanced ransomware protection and recovery, helping organizations defend against and recover from ransomware attacks like Kasiski.
Last updated: December 30, 2025
Elastio detects Kasiski inside your data and backups.
The Hunt Engine uses Deep File Inspection to identify Kasiski across live data, replicated data, and backups. If this family is in your environment, Elastio finds it before encryption completes. Run a scan against your recovery points to confirm.
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