Ransomware Research

Jett Ransomware

Jett 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
Jett
First Seen
March 1, 2025

How Jett Ransomware Works

File Encryption Patterns

Jett modifies encrypted files using specific patterns to mark them as encrypted:

File extensions added after encryption:

..jett

Ransom Note and Payment Demands

After encrypting files, Jett displays ransom notes demanding payment for file recovery:

fileReadMe.txt

Ransom message:

notes/ReadMe.txt

Note locations:

EveryFolder
fileinfo.hta

Ransom message:

notes/info.hta

Note locations:

EveryFolder

Technical Indicators

Associated Executable Files

The following executable files are associated with Jett ransomware:

  • Ransomware.exe

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About This Analysis

This Jett 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 Jett.

Last updated: July 30, 2025

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