Ransomware Research

InstallPay Ransomware

InstallPay is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on October 1, 2020, this ransomware has been actively targeting systems worldwide.

Quick facts

Ransomware Family
InstallPay
First Seen
October 1, 2020

How InstallPay ransomware works

File encryption patterns

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

Extensions added after encryption
.crypted

Ransom note and payment demands

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

screenshot
notes/pay.jpg
Location: Desktop

Technical indicators

Associated executable files

The following executable files are associated with InstallPay ransomware:

About this analysis

This InstallPay 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 InstallPay.

Last updated: December 30, 2025

Detection coverage

Elastio detects InstallPay inside your data and backups.

The Hunt Engine uses Deep File Inspection to identify InstallPay 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 InstallPay Ransomware? | Elastio