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

File encryption patterns

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

Extensions added after encryption
.thx

Ransom note and payment demands

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

fileinfo.txt
notes/info.txt
Location: RootDiscs, Desktop
fileInfo.hta
notes/Info.hta
Location: StartUp

Technical indicators

Associated executable files

The following executable files are associated with thx ransomware:

About this analysis

This thx ransomware analysis is part of Elastio's comprehensive ransomware detection database. Elastio provides advanced ransomware protection and recovery, helping organizations defend against and recover from ransomware attacks like thx.

Last updated: December 30, 2025

Detection coverage

Elastio detects thx inside your data and backups.

The Hunt Engine uses Deep File Inspection to identify thx across live data, replicated data, and backups. If this family is in your environment, Elastio finds it before encryption completes. Run a scan against your recovery points to confirm.

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What is thx Ransomware? | Elastio