Ransomware Research

Cryptomix-WORK Ransomware

Cryptomix-WORK is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on December 1, 2017, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: WORK CryptoMix.

Quick facts

Ransomware Family
Cryptomix-WORK
First Seen
December 1, 2017
Known Aliases
WORK CryptoMix

How Cryptomix-WORK ransomware works

File encryption patterns

Cryptomix-WORK modifies encrypted files using specific patterns to mark them as encrypted:

Extensions added after encryption
.WORK

Ransom note and payment demands

After encrypting files, Cryptomix-WORK displays ransom notes demanding payment for file recovery:

file_HELP_INSTRUCTION.TXT
notes/_HELP_INSTRUCTION.TXT
Location: EveryFolder

Technical indicators

Associated executable files

The following executable files are associated with Cryptomix-WORK ransomware:

About this analysis

This Cryptomix-WORK 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-WORK.

Last updated: December 30, 2025

Detection coverage

Elastio detects Cryptomix-WORK inside your data and backups.

The Hunt Engine uses Deep File Inspection to identify Cryptomix-WORK 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-WORK Ransomware? | Elastio