Ransomware Research
Fog Ransomware
Fog is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on April 1, 2024, this ransomware has been actively targeting systems worldwide.
Quick Facts
- Ransomware Family
- Fog
- First Seen
- April 1, 2024
How Fog Ransomware Works
Targeted Files
https://arcticwolf.com/resources/blog/lost-in-the-fog-a-new-ransomware-threat/ https://www.bleepingcomputer.com/news/security/new-fog-ransomware-targets-us-education-sector-via-breached-vpns/ Requires config (json) 100cbf5578cfd03950c8606c6131a85635a8278696d3d64ecb629fa09af449e9 -> detects sandboxes / VMs https://github.com/TheRavenFile/Daily-Hunt/blob/main/FOG%20RANSOMWARE
File Encryption Patterns
Fog modifies encrypted files using specific patterns to mark them as encrypted:
File extensions added after encryption:
..FOG..FLOCKEDRansom Note and Payment Demands
After encrypting files, Fog displays ransom notes demanding payment for file recovery:
readme.txtRansom message:
notes/readme.txt
Technical Indicators
Associated Executable Files
The following executable files are associated with Fog ransomware:
enc.exelocker_out.exe
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About This Analysis
This Fog 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 Fog.
Last updated: July 30, 2025