Ransomware Research

thx Ransomware

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

Quick Facts

Ransomware Family
thx
First Seen
June 1, 2023

How thx Ransomware Works

Targeted Files

Full extension -> .id-C63F241F.[cluster1@outlook.sa].thx

File Encryption Patterns

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

File extensions added after encryption:

..thx

Ransom Note and Payment Demands

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

fileinfo.txt

Ransom message:

notes/info.txt

Note locations:

RootDiscsDesktop
fileInfo.hta

Ransom message:

notes/Info.hta

Note locations:

StartUp

Technical Indicators

Associated Executable Files

The following executable files are associated with thx ransomware:

  • file.exe

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About This Analysis

This thx 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 thx.

Last updated: July 30, 2025

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thx Ransomware - Detectable by Elastio