CryptoMix Ransomware
CryptoMix is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on April 1, 2016, this ransomware has been actively targeting systems worldwide.
Quick facts
How CryptoMix ransomware works
File encryption patterns
CryptoMix modifies encrypted files using specific patterns to mark them as encrypted:
Ransom note and payment demands
After encrypting files, CryptoMix displays ransom notes demanding payment for file recovery:
notes/_HELP_INSTRUCTIONS_.TXT
notes/INSTRUCTION RESTORE FILE.TXT
notes/INSTRUCTION RESTORE FILE.TXT
notes/_HELP_INSTRUCTION.TXT
Technical indicators
Associated executable files
The following executable files are associated with CryptoMix ransomware:
- CTARX.exe
- AdobeFlashPlayer_5bfd178c5dfcb0db.exe
- adobeflashplayer_d460ffbf1c9b74e8.exe
- AdobeFlashPlayer_58fc97331c9b74ea.exe
- AdobeFlashPlayer_6e166b785dfcb0db.exe
- HydraCrypt
- myfile.exe
- Backup Instruction.exe
- 353E.tmp
- Microsoft Decode Ransomware
- radEF352.tmp.exe
- MS SecurityFiles.
- Spy Security SoftWare_5dfcb0db_9dd17731.exe
- Security SoftWare Shield
- Microsoft Decryptor Ransomware.exe
- build_2017-07-26_18-48.exe
- BC1CFBB99D.exe
- dumpedzero
- Labs.exe
- BC1C9B74EA.exe
- RacePostings
- MS SecurityFiles.exe
- a.exe
- pluginoffice.exe
- mole.exe
About this analysis
This CryptoMix 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.
Last updated: December 30, 2025
Elastio detects CryptoMix inside your data and backups.
The Hunt Engine uses Deep File Inspection to identify CryptoMix 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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