Ransomware Research

PyStar Ransomware

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

Quick facts

Ransomware Family
PyStar
First Seen
November 1, 2021

How PyStar ransomware works

File modification behavior

PyStar updates file modification timestamps after encryption.

Ransom note and payment demands

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

fileALERT.txt
notes/ALERT.txt

Location: Desktop

Technical indicators

Associated executable files

The following executable files are associated with PyStar ransomware:

  • star.exe

About this analysis

This PyStar 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 PyStar.

Last updated: March 4, 2026

Detection coverage

Elastio detects PyStar inside your data and backups.

The Hunt Engine uses Deep File Inspection to identify PyStar across live data, replicated data, and backups. If this family is in your environment, Elastio finds it before encryption completes. Run a hunt against your recovery points to confirm.