Ransomware Research
UpdateHost Ransomware
UpdateHost is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on February 1, 2017, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- UpdateHost
- First Seen
- February 1, 2017
How UpdateHost Ransomware Works
Targeted Files
Doesn't encrypt C drive
File Encryption Patterns
UpdateHost modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..lockedRansom Note and Payment Demands
After encrypting files, UpdateHost displays ransom notes demanding payment for file recovery:
READ_IT.txtRansom message:
notes/READ_IT.txt
Note locations:
DesktopTechnical Indicators
Associated Executable Files
The following executable files are associated with UpdateHost ransomware:
UpdateHost.exe
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About This Analysis
This UpdateHost 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 UpdateHost.
Last updated: July 30, 2025