.guvara Files Virus (STOP) – WHAT IS IT + Remove It

.guvara Files Virus (STOP) – WHAT IS IT + Remove It

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What are .guvara files? How to open .guvara files? How to remove STOP ransomware and try to restore .guvara encrypted files?

A new variant of STOP ransomware has been recently detected to use the .guvara file extension which is added to the files, encrypted by it. The virus may attack your computer and change the file extension of your files after encrypting them. The .guvara files cannot be opened and the creators of this virus want you to pay ransom in order to be able to use the files again. This ransom is usually paid out in BitCoin and the crooks threaten victims in their _open_.txt ransom note that they must pay as fast as possible. If your PC has the .guvara files, then we recommend reading this article.

Threat Summary

Name.guvara Files Virus
TypeRansomware, Cryptovirus
Short DescriptionVariant of STOP Ransomware. Encrypts your files and holds them hostage until you pay ransom to be able to use them again.
SymptomsFiles are encrypted and have the .guvara extension aded. They become no longer usable and a ransom note _open_.txt appears.
Distribution MethodSpam Emails, Email Attachments, Executable files
Detection Tool See If Your System Has Been Affected by .guvara Files Virus


Malware Removal Tool

User ExperienceJoin Our Forum to Discuss .guvara 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.

.guvara Ransomware – How Did I Get It and What Does It Do?

The main method which is used to spread the .guvara ransomware virus is often spam e-mail messages, like the example below:

These messages often carry the virus file as an e-mail attachment and this virus file may pose as some sort of an important document, like an invoice or a receipt for a purchase the victim may have not even heard of. Not only this, but they may also carry a malicious web link, whose main idea could be to be spread as a result of such e-mails. Such links can often hide behind fake buttons of well-made e-mails that often pretend to imitate e-mails coming from PayPal, eBay, DHL and other big companies.

Another form of distribution of the .guvara ransomware virus is usually if the malware is spread by being uploaded on websites, where it often pretends to be a legitimate type of download file. Such files often turn out to be fake installers of programs, fake portable software, cracks, license activators, patches and other files.

Once having infected your computer, the .guvara ransomware may drop its virus files in it. They are often with random names and could be located in the %AppData% or other system Windows directories. Among the dropped files by the .guvara ransomware is the _open_.txt file, containing the ransom message:

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:

The encryption process of the .guvara virus may affect the following types of files;

  • Documents.
  • Videos.
  • Images.
  • Audio files.
  • Archives.
  • Database files.
  • Other important data.

The ransomware uses the AES cipher for encryption, also known as Advanced Encryption Standard. It encodes the files and generates an assymetric decryption key. This key’s main purpose is to correspond with a special decryption program, which only the crooks behind the .guvara virus have and want you to pay BitCoins for it. After encryption, the files appear like the following:

Besides these activities, the .guvara variant of STOP ransomware could also do the following unauthorized actions on your computer:

  • Create files.
  • Create mutexes.
  • Read and write files.
  • Delete your backups.
  • Stop the Windows Recovery Services.
  • Install other viruses.
  • Check if it’s running on a virtual drive or if it has infected your PC before.

Remove .guvara Files Ransomware and Try Restoring Data

To remove this virus, we strongly recommend that you do a fresh backup beforehand. This will allow you to save your files from permanent breaking, even if they are encoded. When a decryptor is out, we will update this article, so we also advise that you keep reading it for more information on a free decrypter. In the meantime, you can try and recover files by checking the “Try to restore” step below. It contains several methods that are not 100% effective, but they can at least get some of your files back.

Until then, you should follow the steps below to remove the .guvara virus. If the first two steps do not seem to have much help, then we advise what most experts would – to run a scan on your PC with an advanced malware remediation software. Such anti-malware program will scan your computer and remove all malicious files automatically, plus make sure that viruses, like .guvara STOP ransomware do not come back in the future.


Ventsislav Krastev

Ventsislav has been covering the latest malware, software and newest tech developments at SensorsTechForum for 3 years now. He started out as a network administrator. Having graduated Marketing as well, Ventsislav also has passion for discovery of new shifts and innovations in cybersecurity that become game changers. After studying Value Chain Management and then Network Administration, he found his passion within cybersecrurity and is a strong believer in basic education of every user towards online safety.

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  1. AvatarGuillermo Hurtado

    Hola. Gracias por tan buena labor de ayudar a los que estamos sufriendo por esta plaga del ransomware. Tal vez me puedan ayudar. tengo el ransomware extensión GUVARA. descargué el STOPDECRYPTER y dice que tiene soporte para esta extension pero no desencripta nada. coloqué unos archivos encriptados para ensayar en determinada carpeta, también, en otra coloqué un archivo encriptado junto a su copia original, es decir, sin encriptar. pero tampoco hace nada. que podrá estar pasando? gracias por su respuesta.

  2. AvatarMilena Dimitrova

    Hi Guillermo,

    It appears that currently this version of Stop ransomware is not decryptable. But it is very likely that a decrypter will be developed soon, so you just have to wait a bit longer. We will update our article once a decrypter is available.


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