Ransomware Research

GEHENNA Ransomware

GEHENNA is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on April 1, 2021, this ransomware has been actively targeting systems worldwide.

Quick Facts

Ransomware Family
GEHENNA
First Seen
April 1, 2021

How GEHENNA Ransomware Works

File Encryption Patterns

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

File extensions added after encryption:

..gehenna

Ransom Note and Payment Demands

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

fileGEHENNA-README-WARNING.html

Ransom message:

notes/GEHENNA-README-WARNING.html

Note locations:

Desktop

Technical Indicators

Associated Executable Files

The following executable files are associated with GEHENNA ransomware:

  • sdisd.bin

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About This Analysis

This GEHENNA 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 GEHENNA.

Last updated: July 30, 2025

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