Ransomware Research
Cyb Ransomware
Cyb is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on May 1, 2023, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- Cyb
- First Seen
- May 1, 2023
How Cyb Ransomware Works
Targeted Files
Full extension -> .[MJ-RX9064251387](cybcyb123@tutanota.com).cyb
File Encryption Patterns
Cyb modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..cybRansom Note and Payment Demands
After encrypting files, Cyb displays ransom notes demanding payment for file recovery:
Dectryption-guide.txtRansom message:
notes/Dectryption-guide.txt
Note locations:
RootDiscsTechnical Indicators
Associated Executable Files
The following executable files are associated with Cyb ransomware:
malware.exe
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About This Analysis
This Cyb 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 Cyb.
Last updated: July 30, 2025