Ransomware Research
CryptoMix-ZAYKA Ransomware
CryptoMix-ZAYKA 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. Security researchers also track this malware under the aliases: ZAYKA.
Quick Facts
- Ransomware Family
- CryptoMix-ZAYKA
- First Seen
- July 1, 2017
- Known Aliases
- ZAYKA
How CryptoMix-ZAYKA Ransomware Works
Targeted Files
Encrypts filenames -> F06C3C509054X0B7D28ZCDDBB17087B9C3E.ZAYKA
File Encryption Patterns
CryptoMix-ZAYKA modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..ZAYKARansom Note and Payment Demands
After encrypting files, CryptoMix-ZAYKA displays ransom notes demanding payment for file recovery:
_HELP_INSTRUCTION.TXTRansom message:
notes/_HELP_INSTRUCTION.TXT
Note locations:
EveryFolderTechnical Indicators
Associated Executable Files
The following executable files are associated with CryptoMix-ZAYKA ransomware:
zayka.exeZAYYKA.EXE
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About This Analysis
This CryptoMix-ZAYKA 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-ZAYKA.
Last updated: July 30, 2025