Ransomware Research

FOX Ransomware

FOX is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on February 1, 2025, this ransomware has been actively targeting systems worldwide.

Quick Facts

Ransomware Family
FOX
First Seen
February 1, 2025

How FOX Ransomware Works

File Encryption Patterns

FOX modifies encrypted files using specific patterns to mark them as encrypted:

File extensions added after encryption:

..SCRT

Ransom Note and Payment Demands

After encrypting files, FOX displays ransom notes demanding payment for file recovery:

fileinfo.txt

Ransom message:

notes/info.txt

Note locations:

RootDiscsDesktop
fileInfo.hta

Ransom message:

notes/Info.hta

Note locations:

StartUpRoaming

Technical Indicators

Associated Executable Files

The following executable files are associated with FOX ransomware:

  • payload.exe

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About This Analysis

This FOX 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 FOX.

Last updated: October 30, 2025

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