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

File modification behavior

Zen updates file modification timestamps after encryption.

File encryption patterns

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

Extensions added after encryption
  • .zen

Ransom note and payment demands

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

fileinfo.txt
notes/info.txt

Location: RootDiscs, Desktop

fileInfo.hta
notes/Info.hta

Location: StartUp, Roaming

Technical indicators

Associated executable files

The following executable files are associated with Zen ransomware:

  • winhost.exe

About this analysis

This Zen ransomware analysis is part of Elastio's comprehensive ransomware detection database. Elastio provides advanced ransomware protection and recovery, helping organizations defend against and recover from ransomware attacks like Zen.

Last updated: May 28, 2025

Detection coverage

Elastio detects Zen inside your data and backups.

The Hunt Engine uses Deep File Inspection to identify Zen across live data, replicated data, and backups. If this family is in your environment, Elastio finds it before encryption completes. Run a hunt against your recovery points to confirm.