Ransomware Research

Shiel Ransomware

Shiel is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on January 1, 2024, this ransomware has been actively targeting systems worldwide.

Quick Facts

Ransomware Family
Shiel
First Seen
January 1, 2024

How Shiel Ransomware Works

Targeted Files

Full extension -> .id-C63F241F.[00223@45312].shiel

File Encryption Patterns

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

File extensions added after encryption:

..shiel

Ransom Note and Payment Demands

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

fileREADME!.txt

Ransom message:

notes/README!.txt

Note locations:

RootDiscsDesktop
fileInfo.hta

Ransom message:

notes/Info.hta

Note locations:

StartUpRoaming

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About This Analysis

This Shiel 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 Shiel.

Last updated: July 30, 2025

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