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Backdoor.teamviewer Removal Guide

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Do you know what Backdoor.teamviewer is?

Backdoor.teamviewer installs itself without user’s permission and allows the malware’s creators to access your computer remotely. The infection is spread through suspicious web pages that display fake warnings about needed updates to the Adobe Flash Player. It may sound strange, but it installs a legitimate upgrade, so users might not understand what actually happened. The truth is that together with the new version of the Adobe Flash Player, you also receive Backdoor.teamviewer. The malware’s creators might use your computer for malicious purposes, so you should delete it immediately. The manual removal instructions are placed at the end if this article, but if it appears to be too complicated for you, install a trustworthy security tool that will take care of the infection.

Many users do not understand how can this malware enter their system without their permission or knowledge. In order to catch this infection you have to visit a malicious web page that contains Trojan.MulDrop6.39120. Such site could suggest you to download an update for your Adobe Flash Player. However, by installing the upgrade, you also allow Trojan.MulDrop6.39120 to drop Backdoor.teamviewer on your system. As a result, you have an updated Adobe Flash Player and the malicious program on your computer.

Apparently, the only way to detect that something is wrong is to notice a suspicious executable file running on your computer, or to witness how the malware’s creators take control over your PC. Backdoor.teamviewer is called this way because it installs a legitimate TeamViewer version on your system, which is needed to access your computer remotely. The malware’s creators could do anything as long as they have remote control of your PC. They can even watch your activities, steal passwords of various accounts, run applications, watch your web traffic, or do anything they want with your data.

Another reason why it is hard to notice the malware is because it places its data in a hidden folder titled as Sin. Usually, users disable Show hidden files, folders and drives option on their computers, so the only way to see the hidden folder is to enable this option. The malware’s folder should contain a malicious .dll file (avicap32.dll), a system file (nv8moxflu) and an executable file (5s.exe). The last two ones might have random names, so the data in your computer could be titled differently. Another sample of Backdoor.teamviewer placed its data straight to the %APPDATA% without creating a folder in it. Thus, if you are going to erase the malware manually keep this in mind and check the mentioned directory carefully.

As you realize, removing Backdoor.teamviewer might be troublesome for you, especially if you do not have much experience in dealing with malware. It might be better to check the instructions below before you decide how you are going to get rid of this malware because there is another solution to this problem. You can simply download a reliable antimalware tool and let it take care of the malicious program. The security tool would scan your system and locate the source of this infection. Also, it would allow you to delete all malicious files automatically. If you still want to erase Backdoor.teamviewer manually, follow the instructions below. Do not forget that you can leave us a comment below if you are having any troubles while removing the malware or if you have some questions about it.

Erase Backdoor.teamviewer

Enable Show hidden files, folders, and drives

Windows 8/Windows 10

  1. Open the Explorer (Windows Key+E).
  2. Select the View tab and click Options in the top-right corner.
  3. Choose Change folder and search options.
  4. Click the View tab and mark Show hidden files, folders and drives.
  5. Press OK.

Windows Vista/Windows 7

  1. Click on Start and select Control Panel.
  2. Pick Appearance and Personalization.
  3. Choose Folder Options and select the View tab.
  4. Select Show hidden files, folders and drives and click OK.

Windows XP

  1. Open Start and launch Control Panel.
  2. Choose Appearance and Themes.
  3. Select Folder options and click the View tab.
  4. Mark Show hidden files and folders and click OK.

Remove Backdoor.teamviewer files

  1. Press Windows Key+E to launch the Explorer.
  2. Copy and insert this location %APPDATA%
  3. Find a folder titled as Sin, right-click it and press Delete.
  4. See if the %APPDATA% directory contains the winmm.dll file.
  5. If it does, right-click winmm.dll and select Delete.
  6. Check if the %APPDATA% has any other suspicious files (e.g. svnhost.exe, teamviewer_resource_en.dll, tv.ini)
  7. Right-click such files separately and select Delete.
  8. Close the Explorer.
  9. Empty Recycle bin.

In non-techie terms:

Backdoor.teamviewer is a harmful program that grants its creators a remote control of your system. It means that they can launch any program, open your documents, infect your system with other malware, steal your passwords, and so on. Needless to say, that erasing the malware from your system should be your only concern right now. You can do it manually with the removal instructions above, although it could be harder than it might appear to be. If you cannot erase the infection manually, you should download and install a trustworthy antimalware tool. You could use it not only to delete the malicious application but also to protect your system from threats.