How to remove BTOS ransomware and decrypt “.btos” files

What is BTOS?

Recently, the new dangerous virus has been detected. It’s called BTOS due to its extension and it is the one of the newest members of STOP(DJVU) file-encryption ransomware family. This family is a very widespread one and it consists of such viruses, as NPSG, TOPI, REHA, NOSU, PORET and KODC ransomwares. As the rule, BTOS ransomware spreads by the means of various executable files, which are shared by file sharing services and torrent trackers. However, as any other virus of this family, the code of BTOS can by injected into a regular and harmless file. In this case, the code is executed together with the opening of this file. Moreover, criminals nowadays infect computers by the means of remote access ports. In this case, it’s very difficult to suppose that your computer is under attack now. That’s why it’s necessary to have a strong antivirus protection, that can defend your operating system in real time. If BTOS got into the system, it begins to change the Registry keys and modifies system processes, in order to inject the malicious code into them. Then the virus begins to modify the file structures of definite formats. If the files were successfully encrypted, they get new .btos extensions, that are added to the files’ names. Then the virus drops the ransom note, the purpose of which is to make the victim pay for the decryptor. Unfortunately, it’s the surest way to decrypt the data, but generally hackers don’t respond to the messages after being paid. That’s why we strongly recommend you to avoid any contact with them and for this purpose we’ve prepared the detailed guide on how to remove BTOS ransomware and decrypt .btos files without paying ransoms.


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Article’s Guide

  1. How to remove BTOS Ransomware from your computer
  2. How to decrypt .btos files
  3. Data Recovery
  4. Automated decryption tools
  5. Other software

How to remove BTOS Ransomware from your computer?

We strongly recommend you to use a powerful anti-malware program that has this threat in its database. It will mitigate the risks of the wrong installation, and will remove BTOS ransomware from your computer with all of its leftovers and register files.

Solution for Windows users: our choice is Norton 360 . Norton 360 scans your computer and detects various threats like BTOS, then removes it with all of the related malicious files, folders and registry keys.

Download Norton windows compatible

If you are Mac user, we advise you to use Combo Cleaner.

How to decrypt .btos files?

Once you’ve removed the virus, you are probably thinking how to decrypt .btos files or at least restore them. Let’s take a look at possible ways of decrypting your data.

Restore .btos files with Data Recovery

Data Recovery

  1. Download and install Data Recovery
  2. Select drives and folders with your files, then click Scan.
  3. Choose all the files in a folder, then press on Restore button.
  4. Manage export location.

Download Stellar Data Recovery

The download is an evaluation version for recovering files. To unlock all features and tools, purchase is required ($49.99-299). By clicking the button you agree to EULA and Privacy Policy. Downloading will start automatically.

Decrypt .btos files with other software

Unfortunately, due to the novelty of BTOS ransomware, there are no decryptors that can surely decrypt encrypted files. Still, there is no need to invest in the malicious scheme by paying a ransom. You are able to recover files manually.
You can try to use one of these methods in order to restore your encrypted data manually.

Decrypt .btos files with Emsisoft decryptor

This software includes information about more than 100 viruses of STOP(DJVU) family and others. All that you need are two files or some luck. You can freely use it as it distributes free of charge. If it doesn’t work for you, you can use another method.

Restore .btos files with Windows Previous Versions

This feature is working on Windows Vista (not Home version), Windows 7 and later versions. Windows keeps copies of files and folders which you can use to restore data on your computer. In order to restore data from Windows Backup, take the following steps:

  1. Open My Computer and search for the folders you want to restore;
  2. Right-click on the folder and choose Restore previous versions option;
  3. The option will show you the list of all the previous copies of the folder;
  4. Select restore date and the option you need: Open, Copy and Restore.

Restore .btos files with System Restore

You can always try to use System Restore in order to roll back your system to its condition before infection infiltration. All the Windows versions include this option.

  1. Type restore in the Search tool;
  2. Click on the result;
  3. Choose restore point before the infection infiltration;
  4. Follow the on-screen instructions.

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