Ransomware Research
Fs0ciety Locker Ransomware
Fs0ciety Locker is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on September 1, 2016, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- Fs0ciety Locker
- First Seen
- September 1, 2016
How Fs0ciety Locker Ransomware Works
Targeted Files
Written in Python Contains VM checks
File Encryption Patterns
Fs0ciety Locker modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..realfs0ciety@sigaint.org.fs0cietyRansom Note and Payment Demands
After encrypting files, Fs0ciety Locker displays ransom notes demanding payment for file recovery:
fs0ciety.htmlRansom message:
notes/fs0ciety.html
Note locations:
RansomPayloadStartFolderTechnical Indicators
Associated Executable Files
The following executable files are associated with Fs0ciety Locker ransomware:
driver_update.exedriver_update[1].exeInvoice_payment.docm
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About This Analysis
This Fs0ciety Locker 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 Fs0ciety Locker.
Last updated: July 30, 2025