Btos is a severe computer threat considered as ransomware. It encrypts majority of computer files and locks it using a strong algorithm. It is unfortunate that victims will never have access to infected files like documents, spreadsheet, photos, archives, images, presentations, and so on. It will remain locked unless victims agreed to pay the ransom fee. Btos developers are doing this kind of operation to gain revenue from victims through their saleable decryption tool. Bear in mind that it is difficult to trust the attackers and paying the ransom demand does not guarantee full recovery of infected files.
How Btos ransomware spreads?
Basic methods are used by cyber criminals to spread a particular ransomware. The best example of it is through spam emails and malicious file downloads. Btos developers sometimes rely on user’s carelessness in opening email attachments. Hackers pretending to be from a trustworthy company will compose a credible email and attach a ransomware-infected file, which will be sent to possible targets. Btos developers usually use money-related emails or banking-related matters, which ought to encourage users to open the attached file. Another one is through malicious downloads like freeware, shareware, or bogus software update and tools. Not all free software and tools can enhance the functions of the system and not all apps and programs are useful. There are rogue ones that can cause issues and infections to computer system just like what Btos can do.
The attack of Btos ransomware virus
Btos targets important files of computer users. The virus encrypts the data and append .btos extension to current file as a way to mark it infected. For example abc.jpg will become abc.jpg.btos after the encryption process. Therefore, users can distinguish all the files that are corrupted by Btos ransomware. One more thing, Btos developers will create a text file containing the message of the current attack, file encryption, and ways to recover all .btos files.
The Btos text file was named under _readme.txt and typically contains the instructions on how to pay the ransom fee. In short, it forces victims to purchase a decryption tool and private key. Oftentimes, Btos developers prefer to use crypto currencies or Botcoins for this transaction. Hence the actual amount of ransom demand is $490 to $980 depending on how soon the victims will send correspondence to attacker.
Unfortunately, only Btos developers have the right and appropriate tool or key to decrypt the infected files as of this moment. Therefore, users are stuck on the choice that they have to pay the ransom demand from the cyber criminals.
Instead of paying the ransom money, malware researchers suggest to archive the .btos files while waiting for the free decryption tool that they may release soon.
How to Remove Btos Ransomware
Ransomware files are placed deeply into the system and on various locations, thus, thorough scanning is vital to totally remove Btos virus. Aside from our suggested tool, you may also run your own security program.
Though affected files may be impossible to decrypt due to complexity of the encryption, you can still try recovery method like alternative tool, Shadow Explorer or Previous Version as described below.
Stage 1: Scan the Computer with Anti-Malware Tool
1. Download free anti-malware scanner called MalwareBytes Anti-Malware.
Malwarebytes Anti-Malware Download Link (this will open a new window)
2. After downloading, install the program. It may run automatically or you have to double-click on the downloaded file MB3-Setup-[version].exe.
3. Carry out the installation with default setup process.
4. At the last stage of installation process, click the Finish button. The program should launch momentarily.
5. On Malwarebytes Anti-Malware console, select Scan from the menu to see available Scan Method.
6. Next, click on Threat Scan. This is the most complete scan method that will surely find any hidden malicious objects associated to Btos ransomware.
7. Finally, click on Start Scan begin checking the computer for malware and similar threats.
8. Once the scan has completed, the tool will display the list of detected threats. Remove all identified malicious items and restart the computer if necessary.
Stage 2: Double-check for Btos’s leftover with Microsoft’s Malicious Software Removal Tool
1. Download the free scanner called Malicious Software Removal Tool.
Malicious Software Removal Tool Download Link (this will open a new window)
2. The tool automatically checks the operating system and suggest appropriate download version. Click on Download button to begin. Save the file to a convenient location, preferably on Desktop.
3. After downloading the file, Windows will prompt that download has completed. Click Run to start scanning for Btos ransomware. Another option is to browse the location folder and double click on the file to run.
4. The tool will display Welcome screen, click Next. Please note the message “This tool is not a replacement for an antivirus product.” You must understand that this program is made specifically to find and remove malware, viruses, Trojans, and other harmful elements on the computer. It was not designed to protect the computer.
5. Next, you will see Scan Type. Please choose Full Scan to ensure that all Btos ransom virus entities and other harmful files left on the computer will be found and removed. For advanced computer user, you can opt for Customized Scan, if there are other drives or folders you wanted to include in this scan.
6. Full scan may take a while, please wait for Malicious Software Removal Tool to complete the tasks. However, you may cancel the scan anytime by clicking on the Cancel button.
7. After scanning, the tool will reveal all identified threats. There may be other threats that our first scan fails to detect. Please remove/delete all detected items.
8. When removal procedure is complete, you may now close Malicious Software Removal Tool. We hope that Btos ransomware have been completely deleted from the computer. Please restart Windows to proceed with the normal operation.
Stage 3 : Unlocking files with Btos Decryption Tool
Tools that may decrypt files infected by Btos is not yet available at this time. We will update this section once the tool is on hand. In the meantime, please try the options below.
Option 1: Windows Previous Version Tool
Windows Vista and Windows 7 have a feature called Previous Versions. However, this tool is only usable if restore point was made prior to Btos ransomware infection. To use this tool and recover files affected by the virus, please follow these steps:
1. Open My Computer or Windows Explorer.
2. Right-click on the affected files or folders. From the drop-down list, please click on Restore previous versions.
3. New window will open display all backup copy of files and folders you wanted to recover. Choose the appropriate file and click on Open, Copy, or Restore. Restoring selected files overwrites the current encrypted files on the computer.
Option 2: Use ShadowExplorer to restore files encrypted by Btos Ransomware
Just like Previous Version tool, ShadowExplorer is taking advantage of shadow copy created by Windows. This tool allows you to retrieve older version of files before it was encrypted by Btos ransomware.
1. Download ShadowExplorer from the official web site.
2. Install the program with the default settings.
3. The program should run automatically after installation. If not, double-click on ShadowExplorer icon.
4. You can see the drop-down list on top of the console. Please select proper drive and the most recent point-in-time shadow copies of files you wish to restore prior to Btos ransomware infection.
5. Right-click on the Drive, Folder, or File you wish to restore and click Export…
6. Lastly, ShadowExplorer will prompt for location where you want to save the copy of recovered files.