Ransomware Research
Seoirse Ransomware
Seoirse is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on December 1, 2016, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- Seoirse
- First Seen
- December 1, 2016
How Seoirse Ransomware Works
Targeted Files
Test (broken) sample
File Encryption Patterns
Seoirse modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..seoirseRansom Note and Payment Demands
After encrypting files, Seoirse displays ransom notes demanding payment for file recovery:
Ransom message:
notes/note.txt
Note locations:
OnceOnCompletionTechnical Indicators
Associated Executable Files
The following executable files are associated with Seoirse ransomware:
Seoirse Ransom.exe
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About This Analysis
This Seoirse 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 Seoirse.
Last updated: July 30, 2025