Ransomware Research

WannaCryOnClick Ransomware

WannaCryOnClick is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on July 1, 2017, this ransomware has been actively targeting systems worldwide.

Quick facts

Ransomware Family
WannaCryOnClick
First Seen
July 1, 2017

How WannaCryOnClick ransomware works

File encryption patterns

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

Extensions added after encryption
.EOD

Ransom note and payment demands

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

message
notes/note.txt
Location: OnceOnCompletion

Technical indicators

Associated executable files

The following executable files are associated with WannaCryOnClick ransomware:

About this analysis

This WannaCryOnClick 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 WannaCryOnClick.

Last updated: December 30, 2025

Detection coverage

Elastio detects WannaCryOnClick inside your data and backups.

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

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What is WannaCryOnClick Ransomware? | Elastio