Ransomware Research

PetyaX Ransomware

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

Quick Facts

Ransomware Family
PetyaX
First Seen
April 1, 2025

How PetyaX Ransomware Works

File Encryption Patterns

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

File extensions added after encryption:

..petyax

Ransom Note and Payment Demands

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

filenote.html

Ransom message:

notes/note.html

Note locations:

EveryFolder

Technical Indicators

Associated Executable Files

The following executable files are associated with PetyaX ransomware:

  • PetyaX.dll
  • PetyaX.exe

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About This Analysis

This PetyaX 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 PetyaX.

Last updated: July 30, 2025

PetyaX Ransomware - Detectable by Elastio