Ransomware Research
SevenDays Ransomware
SevenDays is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on August 1, 2017, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- SevenDays
- First Seen
- August 1, 2017
How SevenDays Ransomware Works
File Encryption Patterns
SevenDays modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..SEVENDAYSRansom Note and Payment Demands
After encrypting files, SevenDays displays ransom notes demanding payment for file recovery:
HOW TO DECRYPT FILES.txtRansom message:
notes/HOW TO DECRYPT FILES.txt
Note locations:
EveryFolderTechnical Indicators
Associated Executable Files
The following executable files are associated with SevenDays ransomware:
sevendays.exe
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About This Analysis
This SevenDays 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 SevenDays.
Last updated: July 30, 2025