Ransomware Research

HermesVirus HT Ransomware

HermesVirus HT is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on April 1, 2019, this ransomware has been actively targeting systems worldwide.

Quick facts

Ransomware Family
HermesVirus HT
First Seen
April 1, 2019

How HermesVirus HT ransomware works

File encryption patterns

HermesVirus HT modifies encrypted files using specific patterns to mark them as encrypted:

Extensions added after encryption
.hermes

Ransom note and payment demands

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

fileHERMES DECRYPT FILES.txt
notes/HERMES DECRYPT FILES.txt
Location: Desktop
fileHOW TO DECRYPT FILES.txt
notes/HOW TO DECRYPT FILES.txt
Location: Desktop

Technical indicators

Associated executable files

The following executable files are associated with HermesVirus HT ransomware:

About this analysis

This HermesVirus HT 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 HermesVirus HT.

Last updated: December 30, 2025

Detection coverage

Elastio detects HermesVirus HT inside your data and backups.

The Hunt Engine uses Deep File Inspection to identify HermesVirus HT 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.

See How the Hunt Engine WorksRequest a Demo

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What is HermesVirus HT Ransomware? | Elastio