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BKRansomware ransomware. How to remove? (Uninstall guide)

removal by Olivia Morelli - - | Type: Ransomware

BKRansomware – a ransomware virus targeting Vietnamese and neighboring countries

BKRansomware ransomware virus

BKRansomware is one of the latest ransomware detections spotted at the beginning of May 2018. Its payload is being disseminated in the form of BKRansomware.exe, which may be disguised under malicious spam emails or injected into PCs using brute force attacks. Once installed, it enables SHA encryption algorithm and encodes .txt, .cpp, .docx, .bmp, .doc, .pdf, .jpg, .pptx, .png, .c, .py, .sql file formats using ROT23 coder. Upon encryption, each locked file is marked with the .hainhc file extension. In exchange for a decryptor, the victim is asked to pay 50k Viettel[1] (a form of credit for mobile phones).

Name BKRansomware
Type of malware Ransomware
Encryption type SHA1, SHA256, ROT23
Distribution Malicious spam email, EK, hacked RDP, rogue software updates, etc. 
Related files BKRansomware.exe
Removal possibilities Automatic removal only. Run a scan with Reimage to immunize ransomware instantly.

According to ransomware researcher,[2] the exact compilation timestamp of this virus is the 3rd of May. Likewise other ransomware-type viruses, BKRansomware ransomware virus is being distributed in many ways, including but not limited to spam emails, Exploit Kits, and hacked Remote Desktop Programs (RDP).

As soon as the BKRansomware.exe file is being executed, the virus enables the SHA1 and SHA256 ciphers and renders the ROT23 coder to attack personal files. In comparison to other ransomware, this one cannot boast being a wide profile ransomware virus as it is capable of encrypting the following file types only:

.txt, .cpp, .docx, .bmp, .doc, .pdf, .jpg, .pptx, .png, .c, .py, .sql

Following the encryption, BKRansomware malware appends a .hainhc file extension to all encoded files. Furthermore, the victim is presented with a ransom note, which is generated in the form of a Command Prompt window stemming from C:\Users\admin\AppData\Local\Temp\BKRansomware.exe. The note says:

send 50k Viettel to 0963210438 to restore your data
Press any key to continue . . .

Based on the information collected by ransomware researchers, the BKRansomware ransomware targets Vietnamese and neighboring country residents. It demands a ransom in the form of Viettel, which is a form of credit for mobile phones. It means that the victims are supposed to add credit to the mobile account and send 50k of Vittel to cybercriminals.

At the moment of writing, the BKRansomware ransomware virus is under an active development phase. No victims have been registered yet. It seems that cybercriminals seek to analyze the capabilities of VirusTotal testing to find out the detection ration. At the moment of writing, most of the reputable anti-virus (30 out of 65)[3] managed to remove BKRansomware from the system.

To protect yourself from ransomware attack, make sure to install a professional anti-virus with real-time protection and keep it up-to-date. Besides, keep Windows updates to evade vulnerabilities.

In case of an attack, you should better hurry with BKRansomware removal. While this ransomware is not too dangerous right now, developers keep their software updated implementing new features and making them compatible with more file extensions than the prior version.

To get rid of BKRansomware ransomware, we recommend running a full system scan with Reimage, Plumbytes Anti-MalwareWebroot SecureAnywhere AntiVirus or Malwarebytes Anti Malware. However, you are free to use an anti-virus if your preference.

Malicious viruses can easily exploit vulnerabilities

Ransomware viruses is a number one threat for the last couple of years. They are invented in a tricky manner, which enables them to spread on the Internet stealthily and then attack unsuspecting PC users with full capacity.

Most common source of ransomware infections is through spam emails. Using spam bots, criminals disseminate catchy email messages to thousands or hundreds of thousands PC users. Such emails usually contain an infected attachment (.doc, .xls, .txt, .zip and many others). Once clicked, it executes a ransomware payload which enables a cipher and leads to file encryption.

Peer-to-peer (P2P) and other suspicious download sources can be potentially dangerous as well. Hackers may try to upload their virus as a file, which seems like free software. According to NoVirus.uk[4] security team highly recommend people to stay away from questionable download sources, as well as shardy software downloads, controversial ads, and links.

BKRansomware virus removal instructions and file recovery tutorial

The very first step after ransomware attack is to remove BKRansomware from your PC. For that, use a professional anti-malware program. If you have one installed, don't forget to update it before running a scan.

Manual BKRansomware removal is hardly possible due to the multiplicity of scripts that it runs once installed. The only way to root it out completely is to eliminate all related files and recover all the changes that it initiated all at once.

Upon BKRansomware removal, you can try to recover your files using third-party data recovery programs or other alternative methods.

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What to do if failed?
If you failed to remove infection using Reimage, submit a question to our support team and provide as much details as possible.
Reimage is recommended to uninstall BKRansomware ransomware. Free scanner allows you to check whether your PC is infected or not. If you need to remove malware, you have to purchase the licensed version of Reimage malware removal tool.
More information about this program can be found in Reimage review.
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Manual BKRansomware virus Removal Guide:

Remove BKRansomware using Safe Mode with Networking

It's not a secret that ransomware virus can block anti-virus programs. In this case, do not fall for panic. Windows OS users can disable all malicious and suspicious programs by booting the system into Safe Mode with Networking. For that, please follow this guide:

  • Step 1: Reboot your computer to Safe Mode with Networking

    Windows 7 / Vista / XP
    1. Click Start Shutdown Restart OK.
    2. When your computer becomes active, start pressing F8 multiple times until you see the Advanced Boot Options window.
    3. Select Safe Mode with Networking from the list Select 'Safe Mode with Networking'

    Windows 10 / Windows 8
    1. Press the Power button at the Windows login screen. Now press and hold Shift, which is on your keyboard, and click Restart..
    2. Now select Troubleshoot Advanced options Startup Settings and finally press Restart.
    3. Once your computer becomes active, select Enable Safe Mode with Networking in Startup Settings window. Select 'Enable Safe Mode with Networking'
  • Step 2: Remove BKRansomware

    Log in to your infected account and start the browser. Download Reimage or other legitimate anti-spyware program. Update it before a full system scan and remove malicious files that belong to your ransomware and complete BKRansomware removal.

If your ransomware is blocking Safe Mode with Networking, try further method.

Remove BKRansomware using System Restore

This method is an alternative in case Safe Mode failed to unlock the security tool:

  • Step 1: Reboot your computer to Safe Mode with Command Prompt

    Windows 7 / Vista / XP
    1. Click Start Shutdown Restart OK.
    2. When your computer becomes active, start pressing F8 multiple times until you see the Advanced Boot Options window.
    3. Select Command Prompt from the list Select 'Safe Mode with Command Prompt'

    Windows 10 / Windows 8
    1. Press the Power button at the Windows login screen. Now press and hold Shift, which is on your keyboard, and click Restart..
    2. Now select Troubleshoot Advanced options Startup Settings and finally press Restart.
    3. Once your computer becomes active, select Enable Safe Mode with Command Prompt in Startup Settings window. Select 'Enable Safe Mode with Command Prompt'
  • Step 2: Restore your system files and settings
    1. Once the Command Prompt window shows up, enter cd restore and click Enter. Enter 'cd restore' without quotes and press 'Enter'
    2. Now type rstrui.exe and press Enter again.. Enter 'rstrui.exe' without quotes and press 'Enter'
    3. When a new window shows up, click Next and select your restore point that is prior the infiltration of BKRansomware. After doing that, click Next. When 'System Restore' window shows up, select 'Next' Select your restore point and click 'Next'
    4. Now click Yes to start system restore. Click 'Yes' and start system restore
    Once you restore your system to a previous date, download and scan your computer with Reimage and make sure that BKRansomware removal is performed successfully.

Bonus: Recover your data

Guide which is presented above is supposed to help you remove BKRansomware from your computer. To recover your encrypted files, we recommend using a detailed guide prepared by 2-spyware.com security experts.

If your files are encrypted by BKRansomware, you can use several methods to restore them:

Take advantage of Data Recovery Pro

Data Recovery Pro is a utility capable of recovering and decrypting a wide range of both personal and system's files. Thus, it's worth given a try. 

Try Previous Windows Version

  • Find an encrypted file you need to restore and right-click on it;
  • Select “Properties” and go to “Previous versions” tab;
  • Here, check each of available copies of the file in “Folder versions”. You should select the version you want to recover and click “Restore”.

Run ShadowExplorer

There's a possibility to retrieve personal files using ShadowExplorer software. It is capable of exploiting Volume Shadow Copies and restoring files using them. 

  • Download Shadow Explorer (http://shadowexplorer.com/);
  • Follow a Shadow Explorer Setup Wizard and install this application on your computer;
  • Launch the program and go through the drop down menu on the top left corner to select the disk of your encrypted data. Check what folders are there;
  • Right-click on the folder you want to restore and select “Export”. You can also select where you want it to be stored.

No BKRansomware decryptor yet.

Finally, you should always think about the protection of crypto-ransomwares. In order to protect your computer from BKRansomware and other ransomwares, use a reputable anti-spyware, such as Reimage, Plumbytes Anti-MalwareWebroot SecureAnywhere AntiVirus or Malwarebytes Anti Malware

About the author

Olivia Morelli
Olivia Morelli - Ransomware analyst

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