FIOI Ransomware
FIOI is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on October 1, 2024, this ransomware has been actively targeting systems worldwide.
Quick facts
How FIOI ransomware works
File encryption patterns
FIOI modifies encrypted files using specific patterns to mark them as encrypted:
Ransom note and payment demands
After encrypting files, FIOI displays ransom notes demanding payment for file recovery:
notes/+README-WARNING+.txt
Technical indicators
Associated executable files
The following executable files are associated with FIOI ransomware:
- FIOI_visual.exe
About this analysis
This FIOI ransomware analysis is part of Elastio's comprehensive ransomware detection database. Elastio provides advanced ransomware protection and recovery, helping organizations defend against and recover from ransomware attacks like FIOI.
Last updated: December 30, 2025
Elastio detects FIOI inside your data and backups.
The Hunt Engine uses Deep File Inspection to identify FIOI across live data, replicated data, and backups. If this family is in your environment, Elastio finds it before encryption completes. Run a scan against your recovery points to confirm.
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