DoNotOpen Ransomware
DoNotOpen is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on January 1, 2017, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: DN.
Quick facts
How DoNotOpen ransomware works
File encryption patterns
DoNotOpen modifies encrypted files using specific patterns to mark them as encrypted:
Ransom note and payment demands
After encrypting files, DoNotOpen displays ransom notes demanding payment for file recovery:
notes/note.txt
Technical indicators
Associated executable files
The following executable files are associated with DoNotOpen ransomware:
- Chrome Update.exe
About this analysis
This DoNotOpen 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 DoNotOpen.
Last updated: December 30, 2025
Elastio detects DoNotOpen inside your data and backups.
The Hunt Engine uses Deep File Inspection to identify DoNotOpen 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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