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
File Encryption Patterns
Unknown modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..unknownRansom Note and Payment Demands
After encrypting files, Unknown displays ransom notes demanding payment for file recovery:
info.txtRansom message:
notes/info.txt
Note locations:
DesktopRootDiscsinfo.htaRansom message:
notes/info.hta
Note locations:
DesktopRootDiscsTechnical Indicators
Associated Executable Files
The following executable files are associated with Unknown ransomware:
program.exeAntiRecuvaDb.exe
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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: October 30, 2025
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