Ransomware Research

ETHAN Ransomware

ETHAN is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on February 1, 2025, this ransomware has been actively targeting systems worldwide.

Quick Facts

Ransomware Family
ETHAN
First Seen
February 1, 2025

How ETHAN Ransomware Works

File Encryption Patterns

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

File extensions added after encryption:

..ETHAN

Ransom Note and Payment Demands

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

fileREAD_NOTE.html

Ransom message:

notes/READ_NOTE.html

Note locations:

EveryFolder
screenshot

Ransom message:

notes/output.png

Note locations:

Desktop

Technical Indicators

Associated Executable Files

The following executable files are associated with ETHAN ransomware:

  • ETHAN.exe

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About This Analysis

This ETHAN 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 ETHAN.

Last updated: July 30, 2025

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