Ransomware Research

Zen Ransomware

Zen is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on May 1, 2025, this ransomware has been actively targeting systems worldwide.

Quick Facts

Ransomware Family
Zen
First Seen
May 1, 2025

How Zen Ransomware Works

Targeted Files

Full extension -> .id-C63F241F.[zen_crypt@tuta.io].zen

File Encryption Patterns

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

File extensions added after encryption:

..zen

Ransom Note and Payment Demands

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

fileinfo.txt

Ransom message:

notes/info.txt

Note locations:

RootDiscsDesktop
fileInfo.hta

Ransom message:

notes/Info.hta

Note locations:

StartUpRoaming

Technical Indicators

Associated Executable Files

The following executable files are associated with Zen ransomware:

  • winhost.exe

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About This Analysis

This Zen 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 Zen.

Last updated: July 30, 2025

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