NightSky Ransomware
NightSky is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on January 1, 2022, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: Night Sky, NightSky Doxware.
Quick facts
How NightSky ransomware works
File encryption patterns
NightSky modifies encrypted files using specific patterns to mark them as encrypted:
Ransom note and payment demands
After encrypting files, NightSky displays ransom notes demanding payment for file recovery:
notes/NightSkyReadMe.hta
Technical indicators
Associated executable files
The following executable files are associated with NightSky ransomware:
- asgrfv
- NightSky.exe
About this analysis
This NightSky 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 NightSky.
Last updated: December 30, 2025
Elastio detects NightSky inside your data and backups.
The Hunt Engine uses Deep File Inspection to identify NightSky 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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