Ransomware Research

Miserium Ransomware

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

Quick Facts

Ransomware Family
Miserium
First Seen
May 1, 2023

How Miserium Ransomware Works

File Encryption Patterns

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

File extensions added after encryption:

./\.[a-z0-9]{4}$/

Ransom Note and Payment Demands

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

file8.txt

Ransom message:

notes/8.txt

Note locations:

EveryFolder
screenshot

Ransom message:

notes/m2kem4pga.jpg

Note locations:

Desktop

Technical Indicators

Associated Executable Files

The following executable files are associated with Miserium ransomware:

  • Miserium.exe
  • svchost.exe

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About This Analysis

This Miserium 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 Miserium.

Last updated: July 30, 2025