.pulsar1 Files Virus (STOP) - How to Remove It

.pulsar1 Files Virus (STOP) – How to Remove It

remove pulsar1 files virus stop ransomware sensorstechforum guide

In this article, you will find more information about .Pulsar1 files virus as well as a step-by-step guide on how to remove malicious files from an infected system and how to potentially recover files encrypted by this ransomware.

The .pulsar1 files virus is yet another variant of STOP/Djvu ransomware discovered by the security researcher Michael Gillespie(@demonslay335). In case of infection with this ransomware, it will encrypt valuable files with the help of sophisticated cipher algorithm and mark them with the extension ..pulsar1. Following data corruption, the threat will drop a note that urges you to pay hackers a ransom for their decryption tool. If you need help for the removal process of .pulsar1 files virus and wonder how to restore encrypted files, make sure to read this article thoroughly.

Threat Summary

Name.pulsar1 Files Virus
TypeRansomware, Cryptovirus
Short DescriptionCreated to encrypt valualbe files stored on compromised computers and afterward urges victims to pay ransom.
SymptomsFiles are encrypted and renamed with the .pulsar1 file extension. A ransom note file called _readme.txt is dropped and loaded on screen to extort ransom payment.
Distribution MethodSpam Emails, Email Attachments
Detection Tool See If Your System Has Been Affected by .pulsar1 Files Virus


Malware Removal Tool

User ExperienceJoin Our Forum to Discuss .pulsar1 Files Virus.
Data Recovery ToolWindows Data Recovery by Stellar Phoenix Notice! This product scans your drive sectors to recover lost files and it may not recover 100% of the encrypted files, but only few of them, depending on the situation and whether or not you have reformatted your drive.

.pulsar1 Files Virus – Distribution

To infect computer systems with their .pulsar1 ransomware hackers may be using several attack methods. The main one is considered to be malspam. Malspam is a technique that enables hackers to spread malicious code via massive e-mail spam campaigns. These e-mails usually present attachments of common file types. In order to make you more prone to download and open the attachment on your computer system, e-mail text messages suggest that the presented file contains important information. So the files may appear as:

  • Reports for closed accounts.
  • Banking documents.
  • Invoices for a purchase.
  • Receipt for a purchase.
  • Notification letters for a refund.
  • Documents for cancelled order.

Different types of files that are uploaded on suspicious or compromised websites may also be used for the spread of .pulsar1 files virus. These types of files often turn out to be:

  • Fake setups of programs.
  • Fake versions of portable software..
  • Patches.
  • Cracks.
  • Updates.
  • Key generators.

.pulsar1 Files Virus – Overview

The .pulsar1 files virus is yet another variant of STOP/Djvu ransomware. Variants that belong to this ransomware family have been circling around the web since the end of 2017. Some of the latest detected variants which are part of STOP family have been detected to use the following extensions:

Once activated on your system, the payload file of .pulsar1 files virus triggers a sequence of malicious operations that aim to corrupt the settings of essential system components. Along with this file, the ransomware needs to establish several other malicious files which it could place in the following folders:

  • %AppData%
  • %Local%
  • %LocalLow%
  • %Roaming%
  • %Temp%

By executing them in a predefined order, .plusar1 crypto virus becomes able to stop certain system processes and eventually evade detection. Furthermore, it may escalate its privileges to become persistent. This, in turn, makes its removal rather complex task even for the most experienced computer users.

At the end of the attack, .plusar1 STOP drops a text file that may be called _readme.txt and loads it on the screen. This file contains a ransom message that informs the following:

———————————————- ALL YOUR FILES ARE ENCRYPTED ———————————————–

Don’t worry, you can return all your files!
All your files documents, photos, databases and other important are encrypted with strongest encryption and unique key.
The only method of recovering files is to purchase decrypt tool and unique key for you.
This software will decrypt all your encrypted files.
What guarantees do we give to you?
You can send one of your encrypted file from your PC and we decrypt it for free.
But we can decrypt only 1 file for free. File must not contain valuable information
Don’t try to use third-party decrypt tools because it will destroy your files.
Discount 50% available if you contact us first 72 hours.
To get this software you need write on our e-mail:
Reserve e-mail address to contact us:
Your personal ID:
[redacted 43 alphanumeric chars]

Beware, that even a successful ransom payment does not guarantee the recovery of .pulsar1 files as hackers may send you broken decryptor or even skip answering you at all.

.pulsar1 Files Virus – Encryption Process

During this process, .pulsar1 files virus activates a built-in encryption module that scans all drives for target files and encodes them with the help of two sophisticated cipher algorithms (AES and RSA). Following encryption, corrupted files cannot be opened. In addition, they have the extension .pulsar1 appended to their names.

Encrypted by this STOP ransomware variant could be:

  • Audio files
  • Video files
  • Document files
  • Image files
  • Backup files
  • Banking credentials, etc

Remove .pulsar1 Files Virus and Attempt to Restore Data

The so-called .pulsar1 files virus is a threat with highly complex code designed to corrupt both system settings and valuable data. So the only way to use your infected system in a secure manner again is to remove all malicious files and objects created by the ransomware. For the purpose, you could use our removal guide that reveals how to clean and secure your system step by step. In addition, in the guide, you will find several alternative data recovery approaches that may be helpful in attempting to restore files encrypted by STOP .pulsar1 ransomware. We remind you to back up all encrypted files to an external drive before the recovery process.

Gergana Ivanova

Gergana Ivanova

Gergana has completed a bachelor degree in Marketing from the University of National and World Economy. She has been with the STF team for four years, researching malware and reporting on the latest infections.

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1 Comment

  1. AvatarJuan LQ

    Se infecto mi laptop con archivos y extension sgte: “.1pulsar” . Tengo el spy hunter5, pero no me elimina aun, por ahora sigo sin ver mis archivos encriptados. Alguien sabe como solucionar?


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