Jaffe Ransomware
Jaffe is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on November 1, 2018, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: Kolet.
Quick facts
How Jaffe ransomware works
File encryption patterns
Jaffe modifies encrypted files using specific patterns to mark them as encrypted:
Ransom note and payment demands
After encrypting files, Jaffe displays ransom notes demanding payment for file recovery:
notes/READ THIS.TXT
notes/READ ME PLEASE!.TXT
Technical indicators
Associated executable files
The following executable files are associated with Jaffe ransomware:
- agent.exe
About this analysis
This Jaffe 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 Jaffe.
Last updated: December 30, 2025
Elastio detects Jaffe inside your data and backups.
The Hunt Engine uses Deep File Inspection to identify Jaffe 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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