Ransomware Research

Optimus Ransomware

Optimus 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
Optimus
First Seen
March 1, 2025

How Optimus Ransomware Works

File Encryption Patterns

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

File extensions added after encryption:

./\.[0-9a-z]{4}$/

Ransom Note and Payment Demands

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

fileOPTIMUS_readme.txt

Ransom message:

notes/OPTIMUS_readme.txt

Note locations:

EveryFolder
screenshot

Ransom message:

notes/muya1m5ts.png

Note locations:

Desktop

Technical Indicators

Associated Executable Files

The following executable files are associated with Optimus ransomware:

  • Optimus.exe
  • Serverice.Host.local.exe

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About This Analysis

This Optimus 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 Optimus.

Last updated: October 30, 2025

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