Ransomware Research

WinRarer Ransomware

WinRarer is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on June 1, 2016, this ransomware has been actively targeting systems worldwide.

Quick facts

Ransomware Family
WinRarer
First Seen
June 1, 2016

How WinRarer ransomware works

File encryption patterns

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

Extensions added after encryption
.ace

Ransom note and payment demands

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

file/\bRecoverYourFiles\d\.htm\b/
notes/RecoverYourFiles4.htm
Location: Desktop
file/\bRecoverYourFiles\d\.rtf\b/
notes/RecoverYourFiles4.rtf
Location: Desktop
screenshot
notes/RecoverYourFiles.png
Location: Desktop

Technical indicators

Associated executable files

The following executable files are associated with WinRarer ransomware:

About this analysis

This WinRarer 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 WinRarer.

Last updated: December 30, 2025

Detection coverage

Elastio detects WinRarer inside your data and backups.

The Hunt Engine uses Deep File Inspection to identify WinRarer 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.

See How the Hunt Engine WorksRequest a Demo

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