Ransomware Research

CryT0Y Ransomware

CryT0Y is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on June 1, 2021, this ransomware has been actively targeting systems worldwide.

Quick facts

Ransomware Family
CryT0Y
First Seen
June 1, 2021

How CryT0Y ransomware works

File encryption patterns

CryT0Y modifies encrypted files using specific patterns to mark them as encrypted:

Extensions added after encryption
.cryt0y

Ransom note and payment demands

After encrypting files, CryT0Y displays ransom notes demanding payment for file recovery:

fileREAD_IT.txt
notes/READ_IT.txt
Location: Desktop
message
notes/READ_IT.txt
Location: Login

Technical indicators

Associated executable files

The following executable files are associated with CryT0Y ransomware:

About this analysis

This CryT0Y 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 CryT0Y.

Last updated: December 30, 2025

Detection coverage

Elastio detects CryT0Y inside your data and backups.

The Hunt Engine uses Deep File Inspection to identify CryT0Y 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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