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Ransomware Research
Unknown Ransomware
Unknown is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on January 1, 2023, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- Unknown
- First Seen
- January 1, 2023
How Unknown Ransomware Works
Targeted Files
https://app.any.run/tasks/446aa3f8-0993-41c6-bc6c-8ea9ae407234/
File Encryption Patterns
Unknown modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..unknown
Ransom Note and Payment Demands
After encrypting files, Unknown displays ransom notes demanding payment for file recovery:
info.txt
Ransom message:
notes/info.txt
Note locations:
Desktop
RootDiscs
info.hta
Ransom message:
notes/info.hta
Note locations:
Desktop
RootDiscs
Technical Indicators
Associated Executable Files
The following executable files are associated with Unknown ransomware:
program.exe
AntiRecuvaDb.exe
Elastio Can Help You
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About This Analysis
This Unknown 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 Unknown.
Last updated: July 30, 2025