Ransomware Research

Pulser Ransomware

Pulser is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on March 1, 2026, this ransomware has been actively targeting systems worldwide.

Quick facts

Ransomware Family
Pulser
First Seen
March 1, 2026

How Pulser ransomware works

File modification behavior

Pulser updates file modification timestamps after encryption.

File encryption patterns

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

Extensions added after encryption
  • .pulser

Ransom note and payment demands

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

filePULSER_NOTE.txt
notes/PULSER_NOTE.txt

Location: Desktop

Technical indicators

Associated executable files

The following executable files are associated with Pulser ransomware:

  • Pulser.exe

About this analysis

This Pulser 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 Pulser.

Last updated: May 21, 2026

Detection coverage

Elastio detects Pulser inside your data and backups.

The Hunt Engine uses Deep File Inspection to identify Pulser 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.