Ransomware Research

Mobef-JustFun Ransomware

Mobef-JustFun is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on December 1, 2020, this ransomware has been actively targeting systems worldwide.

Quick Facts

Ransomware Family
Mobef-JustFun
First Seen
December 1, 2020

How Mobef-JustFun Ransomware Works

Ransom Note and Payment Demands

After encrypting files, Mobef-JustFun displays ransom notes demanding payment for file recovery:

fileIMPORTANT.README

Ransom message:

notes/IMPORTANT.README

Note locations:

EveryFolder
message

Ransom message:

notes/note.txt

Note locations:

OnceOnCompletion

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About This Analysis

This Mobef-JustFun 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 Mobef-JustFun.

Last updated: October 30, 2025

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