Ransomware Research
CryptoMix-CK Ransomware
CryptoMix-CK is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on July 1, 2017, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- CryptoMix-CK
- First Seen
- July 1, 2017
How CryptoMix-CK Ransomware Works
Targeted Files
Encrypts filenames -> F7E853C32B2BA95AF8FF588B2EB38D5A.CK
File Encryption Patterns
CryptoMix-CK modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..CKRansom Note and Payment Demands
After encrypting files, CryptoMix-CK displays ransom notes demanding payment for file recovery:
_HELP_INSTRUCTION.TXTRansom message:
notes/_HELP_INSTRUCTION.TXT
Note locations:
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About This Analysis
This CryptoMix-CK ransomware analysis is part of Elastio's comprehensive ransomware detection database. Elastio provides advanced ransomware protection and recovery solutions, helping organizations defend against and recover from ransomware attacks like CryptoMix-CK.
Last updated: July 30, 2025