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OnyonLock ransomware virus. How to remove? (Uninstall guide)

removal by Linas Kiguolis - - | Type: Ransomware
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OnyonLock is a crypto-ransomware that hails from BTCWare malware group

OnyonLock virus is a ransomware program that encrypts files and adds .onyon file extensions to filenames. The alternative name of the virus is ONYON ransomware, and it seems that it is a new variant of BTCWare virus[1]. The malicious program typically corrupts images, videos, documents, and other important records, then creates a ransom note and saves it as !#_DECRYPT_#!.inf on the desktop and folders that hold some encrypted files. The ransom note warns the victim that files were encrypted “due to a security problem with the PC,” which is actually true. However, this program is illegal because it seeks to infect computer systems on purpose to extort people. Criminals suggest writing a message to decrypter@onyon.su or tk.btcw@protonmail.ch and discussing further actions with developers of the ransomware. Currently, it is unknown how big is the ransom price, and it is likely that they might be willing to negotiate on this matter. The ransom note also provides one condition – the victim has three days to write the attackers; otherwise, they will delete the decryption key from their servers, which would make data recovery impossible. The attackers suggest testing the decryptor by sending three encrypted files; however, their total size must be less than 10Mb. Victims of this ransomware are advised to remove OnyonLock as soon as possible and restore files using data backups. The malware should be deleted using only professional malware removal tools, for instance, Reimage.

OnyonLock ransomware note

The first email address links to onyon[.]su page, and as we decided to visit, we discovered that it holds no content except a huge GIF of two kids trying to look scary. The use of that GIF is likely to be cybercriminals’ form of joking; however, we are sure that it doesn’t seem funny to people who fell victims to the ransomware attack. Besides, we decided to check who registered this site, and WhoIs report shows that registrar’s email address is jonnnilson29[@]gmail.com. If you ever receive an email from this person, do not open it! The attacker might get tracked down soon. Therefore, we suggest adding OnyonLock removal to the top of your to-do tasks list.

Ransomware distribution methods explained

Onyon Lock ransomware reportedly spreads via mail spam[2], so be careful when opening emails. Make sure that you know the sender personally, otherwise do not rush to click on links or attachments added to such virtual letter. We also advise you to avoid suspicious file sharing websites and especially fake “Rogers Hi-Speed Internet” software, which is used to spread BTCWare ransomware. In general, you should never download software from suspicious websites, and also read feedback from other people who have downloaded the software that you’re looking for. Even legitimate programs can contain malicious components, but only if you download these programs from malicious or phishing websites. Being aware of malware distribution methods can help you to avoid these dangerous programs, however, even the most open-eyed computer users can fall victims to various cyber attacks. Therefore, we suggest creating a data backup, regularly updating computer programs and of course, installing a trustworthy anti-malware software.

Best way to remove OnyonLock ransomware

If you’re wondering what is the best way to remove OnyonLock virus, we have the answer – the automatic one. Therefore, we suggest performing a full system scan with a powerful software that can help you to root out both spyware and malware type programs. However, even the best security programs can be stopped by obstacles created by malicious software; therefore, we suggest you read these OnyonLock removal instructions we prepared.

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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 OnyonLock ransomware virus. 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.

More information about this program can be found in Reimage review.

Manual OnyonLock virus Removal Guide:

Remove OnyonLock using Safe Mode with Networking

Reimage is a tool to detect malware.
You need to purchase Full version to remove infections.
More information about Reimage.

Start by rebooting your computer to Safe Mode with Networking. We prepared this tutorial and added pictures to ease the task for you.

  • 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 OnyonLock

    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 OnyonLock removal.

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

Remove OnyonLock using System Restore

Reimage is a tool to detect malware.
You need to purchase Full version to remove infections.
More information about Reimage.

  • 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 OnyonLock. 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 OnyonLock removal is performed successfully.

Bonus: Recover your data

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

If you removed the virus already, plug the drive with a backup on it to the computer. Import files. If you do not have a data backup, it will be very hard to restore corrupted files. Remember that paying the ransom doesn't guarantee data recovery, too! Instead of considering whether you should pay or not, try these data recovery options.

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

Data Recovery Pro tool

You should definitely try using Data Recovery Pro to restore corrupted files.

Shadow-Explore your PC for VSS

Usually viruses delete VSS copies after infecting the system. However, sometimes ransomware fails to carry out malicious instructions completely, therefore, you should give ShadowExplorer a chance to find remaining VSS copies to restore your files.

  • 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.

Use BTCWare decrypter

Victims of OnyonLock ransomware can decrypt their files using the free decrypter by Avast.

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

About the author

Linas Kiguolis
Linas Kiguolis - Expert in social media

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