Ransomware Research

CryptoMix-System Ransomware

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

Quick facts

Ransomware Family
CryptoMix-System
First Seen
January 1, 2018

How CryptoMix-System ransomware works

File encryption patterns

CryptoMix-System modifies encrypted files using specific patterns to mark them as encrypted:

Extensions added after encryption
.SYSTEM

Ransom note and payment demands

After encrypting files, CryptoMix-System displays ransom notes demanding payment for file recovery:

file_HELP_INSTRUCTION.TXT
notes/_HELP_INSTRUCTION.TXT
Location: EveryFolder

About this analysis

This CryptoMix-System 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 CryptoMix-System.

Last updated: December 30, 2025

Detection coverage

Elastio detects CryptoMix-System inside your data and backups.

The Hunt Engine uses Deep File Inspection to identify CryptoMix-System 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 CryptoMix-System Ransomware? | Elastio