Ransomware Research

Eldritch Ransomware

Eldritch is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on September 1, 2023, this ransomware has been actively targeting systems worldwide.

Quick Facts

Ransomware Family
Eldritch
First Seen
September 1, 2023

How Eldritch Ransomware Works

File Encryption Patterns

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

File extensions added after encryption:

..eldritch

Ransom Note and Payment Demands

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

fileREAD-THIS.txt

Ransom message:

notes/READ-THIS.txt

Note locations:

EveryFolder
screenshot

Ransom message:

notes/z63narpg3.jpg

Note locations:

Desktop

Technical Indicators

Associated Executable Files

The following executable files are associated with Eldritch ransomware:

  • EldritchRansom.exe
  • svchost.exe

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About This Analysis

This Eldritch 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 Eldritch.

Last updated: October 30, 2025

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