Ransomware Research

JCoder Ransomware

JCoder is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on August 1, 2017, this ransomware has been actively targeting systems worldwide.

Quick Facts

Ransomware Family
JCoder
First Seen
August 1, 2017

How JCoder Ransomware Works

File Encryption Patterns

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

File extensions added after encryption:

..MTC-2K..MTC

Ransom Note and Payment Demands

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

file{origin_foldername}.WanaCry 2.ini

Ransom message:

notes/Sample videosWanaCry 2.ini

Note locations:

EveryFolder
fileWanaCry.txt

Ransom message:

notes/WanaCry.txt

Note locations:

EveryFolder

Technical Indicators

Associated Executable Files

The following executable files are associated with JCoder ransomware:

  • shosvt.exe
  • Facebooke hacking email.exe

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About This Analysis

This JCoder 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 JCoder.

Last updated: October 30, 2025

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What is JCoder Ransomware? | Elastio