|Type||Computer virus, Programmed attack.|
|Short Description||A PC virus designed to delete user data.|
|Symptoms||Deleted user filers of various extensions. Unknown svchost.exe process.|
|Detection Tool||Download Malware Removal Tool, to See If Your System Has Been Affected by malware|
|User Experience||Join our forum to follow the discussion about W32.Belvira Virus.|
A particularly dangerous virus has been detected by Symantec security researchers, going by the name ‘Belvira’. This virus is reported to create multiple files on the user PC and modify these files in the Windows Registry to run on system start up. What is particularly bad regarding this virus is that it directly deletes user files of several different types. Users are advised to use firewall and to immediately disconnect their computer from the internet.
W32.Belvira Virus – How Did It Infect My PC?
One way you could have become victim of this computer is by opening a spam mail, containing a malicious attachment. If the attack is targeted it may have originated either from a spoof email (that resembles a familiar one) address or an external drive. Targeted attacks also originate to external links that are being clicked on by inexperienced users.
W32.Belvira Virus – How Does It Work?
Once activated on the user PC, the virus creates these files in the %windir% directory:
The svchost process is particularly interesting because it has the same filename of the actual svchost – an essential and important process for Windows. What is more, the virus creates another executable – a file, called smrss.exe in the %System% folder.
After which, the virus is believed to modify the windows.ini file within the %System% folder which is related to the Windows environment.
After its already created the malicious files the virus then makes several registry entries in HKEY_LOCAL_MACHINE to make them run on system startup:
→SOFTWARE\Microsoft\Windows\CurrentVersion\Run\”freizer” = “%Windir%\System32\freizer.exe
SOFTWARE\Microsoft\Windows\CurrentVersion\Run\”svchost” = “%Windir%\system32\svchost.exe
SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\”Shell” = “Explorer.exe smrss.exe
After it has done with the stage of situating itself on the user PC, the virus then scans its drives and deletes files with the following file extensions:
The devastating virus is also reported to infect files within the user PC with .exe and .scr extensions.
Removing W32.Belvira Virus Completely from Infected PC
The best way to remove this trojan horse is with special software since it can replicate several different files, shut down live defense features of antivirus software installed on the computer as well as firewall. This is why it is recommended to follow the step-by-step instructions below to install an advanced anti-malware on the computer and scan it more than one times. But first, you should immediately boot into safe mode without networking or boot a live operating system on the computer.
For how to boot a live OS, check out this tutorial:
And here are instructions on how to boot into Safe Mode and scan your PC to automatically remove the threat from its core and any other malware as well:
- Guide 1: How to Remove W32.Belvira Virus from Windows.
- Guide 2: Get rid of W32.Belvira Virus from Mac OS X.
- Guide 3: Remove W32.Belvira Virus from Google Chrome.
- Guide 4: Erase W32.Belvira Virus from Mozilla Firefox.
- Guide 5: Uninstall W32.Belvira Virus from Microsoft Edge.
- Guide 6: Remove W32.Belvira Virus from Safari.
- Guide 7: Eliminate W32.Belvira Virus from Internet Explorer.
How to Remove W32.Belvira Virus from Windows.
Step 1: Boot Your PC In Safe Mode to isolate and remove W32.Belvira Virus
Step 2: Uninstall W32.Belvira Virus and related software from Windows
Here is a method in few easy steps that should be able to uninstall most programs. No matter if you are using Windows 10, 8, 7, Vista or XP, those steps will get the job done. Dragging the program or its folder to the recycle bin can be a very bad decision. If you do that, bits and pieces of the program are left behind, and that can lead to unstable work of your PC, errors with the file type associations and other unpleasant activities. The proper way to get a program off your computer is to Uninstall it.
Step 3: Clean any registries, created by W32.Belvira Virus on your computer.
The usually targeted registries of Windows machines are the following:
You can access them by opening the Windows registry editor and deleting any values, created by W32.Belvira Virus there. This can happen by following the steps underneath:
Get rid of W32.Belvira Virus from Mac OS X.
Step 1: Uninstall W32.Belvira Virus and remove related files and objects
1. Hit the ⇧+⌘+U keys to open Utilities. Another way is to click on “Go” and then click “Utilities”, like the image below shows:
- Go to Finder.
- In the search bar type the name of the app that you want to remove.
- Above the search bar change the two drop down menus to “System Files” and “Are Included” so that you can see all of the files associated with the application you want to remove. Bear in mind that some of the files may not be related to the app so be very careful which files you delete.
- If all of the files are related, hold the ⌘+A buttons to select them and then drive them to “Trash”.
In case you cannot remove W32.Belvira Virus via Step 1 above:
In case you cannot find the virus files and objects in your Applications or other places we have shown above, you can manually look for them in the Libraries of your Mac. But before doing this, please read the disclaimer below:
You can repeat the same procedure with the following other Library directories:
Tip: ~ is there on purpose, because it leads to more LaunchAgents.
Step 2: Scan for and remove malware from your Mac
When you are facing problems on your Mac as a result of unwanted scripts, programs and malware, the recommended way of eliminating the threat is by using an anti-malware program. Combo Cleaner offers advanced security features along with other modules that will improve your Mac’s security and protect it in the future.
Remove W32.Belvira Virus from Google Chrome.
Step 1: Start Google Chrome and open the drop menu
Step 2: Move the cursor over "Tools" and then from the extended menu choose "Extensions"
Step 3: From the opened "Extensions" menu locate the unwanted extension and click on its "Remove" button.
Step 4: After the extension is removed, restart Google Chrome by closing it from the red "X" button at the top right corner and start it again.
Erase W32.Belvira Virus from Mozilla Firefox.
Step 1: Start Mozilla Firefox. Open the menu window
Step 2: Select the "Add-ons" icon from the menu.
Step 3: Select the unwanted extension and click "Remove"
Step 4: After the extension is removed, restart Mozilla Firefox by closing it from the red "X" button at the top right corner and start it again.
Uninstall W32.Belvira Virus from Microsoft Edge.
Step 1: Start Edge browser.
Step 2: Open the drop menu by clicking on the icon at the top right corner.
Step 3: From the drop menu select "Extensions".
Step 4: Choose the suspected malicious extension you want to remove and then click on the gear icon.
Step 5: Remove the malicious extension by scrolling down and then clicking on Uninstall.
Remove W32.Belvira Virus from Safari.
Step 1: Start the Safari app.
Step 2: After hovering your mouse cursor to the top of the screen, click on the Safari text to open its drop down menu.
Step 3: From the menu, click on "Preferences".
Step 4: After that, select the 'Extensions' Tab.
Step 5: Click once on the extension you want to remove.
Step 6: Click 'Uninstall'.
A pop-up window will appear asking for confirmation to uninstall the extension. Select 'Uninstall' again, and the W32.Belvira Virus will be removed.
Eliminate W32.Belvira Virus from Internet Explorer.
Step 1: Start Internet Explorer.
Step 2: Click on the gear icon labeled 'Tools' to open the drop menu and select 'Manage Add-ons'
Step 3: In the 'Manage Add-ons' window.
Step 4: Select the extension you want to remove and then click 'Disable'. A pop-up window will appear to inform you that you are about to disable the selected extension, and some more add-ons might be disabled as well. Leave all the boxes checked, and click 'Disable'.
Step 5: After the unwanted extension has been removed, restart Internet Explorer by closing it from the red 'X' button located at the top right corner and start it again.