Ransomware Research

Sunjn Ransomware

Sunjn is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on February 1, 2023, this ransomware has been actively targeting systems worldwide.

Quick Facts

Ransomware Family
Sunjn
First Seen
February 1, 2023

How Sunjn Ransomware Works

Targeted Files

Full extension -> .[MJ-QT7806329154](Sunjun3412@onionmail.org).sunjn

File Encryption Patterns

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

File extensions added after encryption:

..sunjn

Ransom Note and Payment Demands

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

fileDectryption-guide.txt

Ransom message:

notes/Dectryption-guide.txt

Note locations:

EveryFolder

Technical Indicators

Associated Executable Files

The following executable files are associated with Sunjn ransomware:

  • 222

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About This Analysis

This Sunjn 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 Sunjn.

Last updated: July 30, 2025

Sunjn Ransomware - Detectable by Elastio