Ransomware Research
Hamster Ransomware
Hamster 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.
Quick Facts
- Ransomware Family
- Hamster
- First Seen
- November 1, 2021
How Hamster Ransomware Works
Targeted Files
Encrypts first 10% of file
File Encryption Patterns
Hamster modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..hamsterRansom Note and Payment Demands
After encrypting files, Hamster displays ransom notes demanding payment for file recovery:
How To decrypt.txtRansom message:
notes/How To decrypt.txt
Note locations:
EveryFolderTechnical Indicators
Associated Executable Files
The following executable files are associated with Hamster ransomware:
e_win.exe
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About This Analysis
This Hamster 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 Hamster.
Last updated: July 30, 2025