Btos Virus

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Btos is a dangerous Windows virus of the Ransomware family that locates the most commonly used files in the computer and locks them. The goal of Btos is to make its victims send money to its creators in exchange for the release of their files.

Btos Virus

The Btos Virus will encrypt all your files with the .btos extension.

The creators of this malware threaten that if the victim doesn’t send the demanded ransom money within a given period of time, the demanded sum would double or the “offer” of paying for the data’s release would no longer be available. If you have recently found yourself in a similar situation and don’t know what course of action to follow, we will tell you about the possible options you can choose from at the moment. However, one thing we must make clear right away is that the recovery of your data cannot be guaranteed no matter what you do. Some of the potential solutions you can try may allow you to bring back some of your data, while others may turn out to be utterly ineffective in your case. The main thing to understand here is that the ransom payment should really only be considered if there are no other options left and if you simply cannot afford to lose the locked data. In all other cases, paying is highly inadvisable.

The Btos virus

The Btos virus is a virus infection that belongs to the widespread Ransomware category of computer threats. The Btos virus blocks access to important files on the attacked machine and tells its victims they need to pay a ransom if they want their files back.

The main reason we recommend that you avoid paying the ransom money is that the hackers’ promises of restoring your data cannot be trusted. You could send the money only to realize that you would still not be allowed to regain access to your files.

If you are in the situation where Btos has taken your data hostage and you really need those files back, our suggestion is to turn to the removal guide you will find right below this article. The steps there will help you remove the virus, thereby making sure that no more of your files will get locked. After the infection is removed, you can move on to the alternative recovery options that will be present in the second segment of the guide.

The Btos file decryption

The Btos file decryption is the main method for restoring files locked by this virus. However, the Btos file decryption requires a special key to complete and that key is only present on the computers of the criminals behind this virus.

That being said, if you are lucky, you may manage to get around the need for decrypting your files or maybe find a custom decryptor tool for this virus, that you can get for free. We have a list of a big number of such free decryptors on our site as well as some other recovery suggestions, but before you get to them in the recovery segment of the guide, you must ensure that the infection is no longer present in your PC.


Name Btos
Type Ransomware
Danger Level High (Ransomware is by far the worst threat you can encounter)
Symptoms Most users don’t notice anything suspicious right up until their files become inaccessible and the ransom note is displayed on their screens.
Distribution Method The most common method used to spread Ransomware is the Trojan horse backdoors.
Data Recovery Tool [banner_table_recovery]
Detection Tool

Remove Btos Ransomware

Btos Virus

Some of the steps will likely require you to exit the page. Bookmark it for later reference.

Reboot in Safe Mode (use this guide if you don’t know how to do it).

Btos Virus


Press CTRL + SHIFT + ESC at the same time and go to the Processes Tab. Try to determine which processes are dangerous. 

Btos Virus

Right click on each of them and select Open File Location. Then scan the files with our free online virus scanner:

Btos Virus
Drag and Drop Files Here to Scan
Maximum file size: 128MB.

This scanner is free and will always remain free for our website's users. You can find its full-page version at:

Scan Results

Virus Scanner Result
Btos VirusClamAV
Btos VirusAVG AV
Btos VirusMaldet

After you open their folder, end the processes that are infected, then delete their folders. 

Note: If you are sure something is part of the infection – delete it, even if the scanner doesn’t flag it. No anti-virus program can detect all infections.

Btos Virus

Hold the Start Key and R –  copy + paste the following and click OK:

notepad %windir%/system32/Drivers/etc/hosts

A new file will open. If you are hacked, there will be a bunch of other IPs connected to you at the bottom. Look at the image below:

Btos Virus

If there are suspicious IPs below “Localhost” – write to us in the comments.

Type msconfig in the search field and hit enter. A window will pop-up:

Btos Virus

Go in Startup —> Uncheck entries that have “Unknown” as Manufacturer.

  • Please note that ransomware may even include a fake Manufacturer name to its process. Make sure you check out every process here is legitimate.

Btos Virus

Type Regedit in the windows search field and press EnterOnce inside, press CTRL and F together and type the virus’s Name. 

Search for the ransomware  in your registries and delete the entries. Be extremely careful –  you can damage your system if you delete entries not related to the ransomware.

Type each of the following in the Windows Search Field:

  1. %AppData%
  2. %LocalAppData%
  3. %ProgramData%
  4. %WinDir%
  5. %Temp%

Delete everything in Temp. The rest just check out for anything recently added. Remember to leave us a comment if you run into any trouble!

Btos Virus 

How to Decrypt Btos files

We have a comprehensive (and daily updated) guide on how to decrypt your files. Check it out here.

If the guide doesn’t help, download the anti-virus program we recommended or try our free online virus scanner. Also, you can always ask us in the comments for help!


About the author


Brandon Skies

Brandon is a researcher and content creator in the fields of cyber-security and virtual privacy. Years of experience enable him to provide readers with important information and adequate solutions for the latest software and malware problems.


  • Hello, the antiviruses couldn’t find the virus and emsi soft decryptor couldn’t recover my files in no type. What should I do? Im so worried about my files please help me please

    • Hi Mahdi, Firstly, we advise you to complete the guide from the current page in order to remove the malware and clean your PC. Then, you can visit our How to Decrypt Ransomware article on this site and use the methods suggested in it to hopefully restore some of your data, but I’m afraid this ransomware is not yet decryptable.

    • Hello Mohish! Firstly, we advise you to complete the guide from the current page in order to remove the malware and clean your PC. Then, you can visit our How to Decrypt Ransomware article on this site and use the methods suggested in it to hopefully restore some of your data. The best thing to do is back those files up onto another drive for safe keeping until a decrypter becomes available.

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