Ransomware Research

Shuriken Ransomware

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

Quick Facts

Ransomware Family
Shuriken
First Seen
December 1, 2023

How Shuriken Ransomware Works

File Encryption Patterns

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

File extensions added after encryption:

..Shuriken

Prefixes added to encrypted files:

[decryption@msgsafe.io]

Ransom Note and Payment Demands

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

fileREAD-ME-SHURKEWIN.txt

Ransom message:

notes/READ-ME-SHURKEWIN.txt

Note locations:

EveryFolder
message

Ransom message:

notes/note.txt

Note locations:

Login

Technical Indicators

Associated Executable Files

The following executable files are associated with Shuriken ransomware:

  • svchost.exe
  • Shuriken
  • winlogon.exe

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About This Analysis

This Shuriken 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 Shuriken.

Last updated: October 30, 2025

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What is Shuriken Ransomware? | Elastio