Ransomware Research

Thanatos Ransomware

Thanatos is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on February 1, 2018, this ransomware has been actively targeting systems worldwide.

Quick Facts

Ransomware Family
Thanatos
First Seen
February 1, 2018

How Thanatos Ransomware Works

File Encryption Patterns

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

File extensions added after encryption:

..THANATOS..PICO

Ransom Note and Payment Demands

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

fileREADME.txt

Ransom message:

notes/README.txt

Note locations:

Desktop

Technical Indicators

Associated Executable Files

The following executable files are associated with Thanatos ransomware:

  • 5394473878.exe
  • 2067153197.exe
  • 3241478554.exe
  • Thanatos.exe
  • 55a.exe
  • 3793478590.exe
  • 4057094551.exe
  • 0330840083.exe
  • 9291998826.exe
  • 9960549608.exe
  • myfile.exe

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About This Analysis

This Thanatos 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 Thanatos.

Last updated: July 30, 2025

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