Ransomware Research
Emsisosisoft Ransomware
Emsisosisoft is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on July 1, 2019, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- Emsisosisoft
- First Seen
- July 1, 2019
How Emsisosisoft Ransomware Works
File Encryption Patterns
Emsisosisoft modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..emsisosisoftRansom Note and Payment Demands
After encrypting files, Emsisosisoft displays ransom notes demanding payment for file recovery:
HOW TO RESTORE ENCRYPTED FILES.TXTRansom message:
notes/HOW TO RESTORE ENCRYPTED FILES.TXT
Note locations:
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About This Analysis
This Emsisosisoft 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 Emsisosisoft.
Last updated: July 30, 2025