Ransomware Research
Doyuk Ransomware
Doyuk is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on November 1, 2021, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: Doyuk 2.0.
Quick Facts
- Ransomware Family
- Doyuk
- First Seen
- November 1, 2021
- Known Aliases
- Doyuk 2.0
How Doyuk Ransomware Works
File Encryption Patterns
Doyuk modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..doyuk2Ransom Note and Payment Demands
After encrypting files, Doyuk displays ransom notes demanding payment for file recovery:
Warning.txtRansom message:
notes/Warning.txt
Note locations:
DesktopTechnical Indicators
Associated Executable Files
The following executable files are associated with Doyuk ransomware:
Encrypt.exe
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About This Analysis
This Doyuk 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 Doyuk.
Last updated: July 30, 2025