Ransomware Research

CryptGh0st Ransomware

CryptGh0st is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on March 1, 2017, this ransomware has been actively targeting systems worldwide.

Quick facts

Ransomware Family
CryptGh0st
First Seen
March 1, 2017

How CryptGh0st ransomware works

File encryption patterns

CryptGh0st modifies encrypted files using specific patterns to mark them as encrypted:

Extensions added after encryption
.cryptgh0st.FileEncrypted.kvllyatprotonmaildotch.rencrypted

Ransom note and payment demands

After encrypting files, CryptGh0st displays ransom notes demanding payment for file recovery:

fileREAD_TO_DECRYPT.html
notes/READ_TO_DECRYPT.html

Technical indicators

Associated executable files

The following executable files are associated with CryptGh0st ransomware:

About this analysis

This CryptGh0st 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 CryptGh0st.

Last updated: December 30, 2025

Detection coverage

Elastio detects CryptGh0st inside your data and backups.

The Hunt Engine uses Deep File Inspection to identify CryptGh0st 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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