This page contains detailed analysis on W32/Ramnit.a. To get rid of this Trojan, please follow the removal guide below.

W32/Ramnit.a is a virus that is self-replicating. It usually propagates via unsecured network connection and removable USB drives including flash drive, writable CD and external hard disk drives. W32/Ramnit.a also spreads by infecting file on the system that is shared on a network environment.

Alias: Type_Win32, Win32/Zbot.A, W32/Infector.Gen2, Win32/Ramnit.A, Win32.Rmnet,
W32.Infector, W32/Patched-I, PE_RAMNIT.A

Damage Level: Medium

Systems Affected: Windows 9x, 2000, XP, Windows Vista

When executed, W32/Ramnit.a it will drop a random-name generated file that contains the strings “Mgr.exe” or “Srv.exe.” It also executes the same file that will to infect other executable it may found on the system. This virus can also infect files that have .HTML and .HTM extension.

Once loaded and running, W32/Ramnit.a will create a backdoor and connects to a remote server to allow a remote attacker to gain control on the compromised computer. It waits for other tasks that the remote attacker may perform on the PC.

The virus can inject malicious code into default Internet browser and uses this method to bypass Windows firewall and other security programs.

Some infected machines may display an error if the Trojan’s embedded code is having conflict to other programs. Here is the sample error message.

Error Report

Virus do self-replicate. Infections are commonly propagated on unsecured computer networks or transmitting the virus to a removable media devices like UDB drives, writable disc, and memory sticks. Viruses can also spread by compromising a shared system files within a network.

How to Remove W32/Ramnit.a

NOTE: We suggest that you PRINT or BOOKMARK this guide. There are steps that we may have to restart the computer in order to successfully remove the threat.

Step 1 : Run a scan with your antivirus program

1. First thing you should do is reboot the computer in Safe Mode with Networking to avoid W32/Ramnit.a from loading at start-up.

Remove all media such as Memory Card, cd, dvd, and USB devices. Then, restart the computer and please do the following:

Boot in Safe Mode on Windows XP, Windows Vista, and Windows 7 system
a) Before Windows begins to load, press F8 on your keyboard.
b) It will display the Advanced Boot Options menu. Select Safe Mode.

Start computer in Safe Mode using Windows 8 and Windows 10
a) Close any running programs on your computer.
b) Get ready to Start Windows. On your keyboard, Press and Hold Shift key and then, click on Restart button.
c) It will prompt you with options, please click on Troubleshoot icon.
d) Under Troubleshoot window, select Advanced Options.
e) On next window, click on Startup Settings icon.
f) Lastly, click on Restart button on subsequent window.
g) When Windows restarts, present startup options with numbers 1 - 9. Select "Enable Safe Mode with Networking" or number 5.

Startup Options

h) Windows will now boot on Safe Mode with Networking. Proceed with virus scan as the next step.

2. Once Windows is running under Safe Mode with Networking, open your antivirus program and download the most recent update. This method ensures that your antivirus program can detect even newer variants of W32/Ramnit.a.

Updating your antivirus software is a one-click process. Please refer to your software manual for complete instructions.

3. Once updating is finished, run a full system scan. After the scan, delete all infected items. If unable to clean or delete, better place the threat in quarantine.

Step 2: Run another test with Norton Power Eraser

1. Click on the button below to download Norton Power Eraser from official web site. Save it to your desktop or any location of your choice.

NPE Download

4. Once the file is downloaded, navigate its location and double-click on the icon (NPE.exe) to launch the program.
5. Norton Power Eraser will run. If it prompts for End User License Agreement, please click on Accept.
6. On NPE main window, click on Advanced. We will attempt to remove W32/Ramnit.a components without restarting the computer.

Advance Scan

7. On next window, select System Scan and click on Scan now to perform standard scan on your computer.

Scan the System

8. NPE will proceed with the scan. It will search for Trojans, viruses, and malware like W32/Ramnit.a. This may take some time, depending on the number of files currently stored on the computer.

9. When scan is complete. All detected risks are listed. Remove them and restart Windows if necessary.

Alternative Removal Methods for W32/Ramnit.a

Option 1 : Use Windows System Restore to return Windows to previous state

During an infection, W32/Ramnit.a drops various files and registry entries. The threat intentionally hides system files by setting options in the registry. With these rigid changes, the best solution is to return Windows to previous working state is through System Restore.

To verify if System Restore is active on your computer, please follow the instructions below to access this feature.

Access System Restore on Windows XP, Windows Vista, and Windows 7

a) Go to Start Menu, then under 'Run' or 'Search Program and Files' field, type rstrui.
b) Then, press Enter on the keyboard to open System Restore Settings.


Open System Restore on Windows 8

a) Hover your mouse cursor to the lower left corner of the screen and wait for the Start icon to appear.
b) Right-click on the icon and select Run from the list. This will open a Run dialog box.
c) Type rstrui on the 'Open' field and click on OK to initiate the command.


If previous restore point is saved, you may proceed with Windows System Restore. Click here to see the full procedure.


About Marco Mathew

Marco Mathew works as Windows Network administrator before establishing precisesecurity.com. Now, Marco is dedicating full-time to help computer users' fight viruses, malware, trojan, worms, adware, and potentially unwanted programs.


  1. AvatarTracey

    Our McAfee security fixed an infected file on our desktop with this W32.Ramnit.a (virus). Could it have come via a memory stick which my 14 year old son normally uses for homework on his laptop, and if so, does it mean his laptop (which doesn’t have McAfee) could be infected too? He has been having a few problems with it lately…..any help would be appreciated, as we are not very ‘techie’ parents!!

  2. AvatarRemove W32.Ramnit

    thank u i had this virus in my pc & after using your advise it has gone so thanks….!

  3. AvatarRais

    I used Dr. Cure IT before to remove this. Now in my laptop it takes too much time to scan & pc reboots for a Blue Screen problem. I tried Doctor Web with 1/2 effective solve. LETS HOPE YOUR IDEA WORKS

  4. AvatarREDDY


    I ram stinger.Ramnit.a virus not at all detected by this program.I tried with norman it is able to detect,but not able to clean the virus.Only option it gives is to delete the infected files.Is there any antivirus which can clean the infected(Ramnit.a) files.

    Thanks in advance

  5. AvatarFrankton

    Reddy, most of the people I know who got infected with this ended up reformatting their PC’s. As you last options, you may try Trend Micro Housecall.

  6. AvatarKapil Sharma

    Try Guardian antivirus 2012 its properly repairing it before booot.

  7. Avatardhirendra

    I am also facing the same problem with virus ramnit .It came thru pen drive . i am using anti virus micro soft essentials which is not able to remove it . it is again and again cleaning and removing the ramnit virus but again after 10 to 15 minutes it detects it .Pl. advice how to removes it . My OS window 7HB

  8. Avatarl

    same problem as @dhirendra but mine came through 1channel movie site, same antivirus micro soft essential and it cant remove it. the virus wont let me install any other anti virus such as avast, avg etc. in some cases it doesnt even display webpages to do with removal of this virus. my memory stick was in the whole time i hope it didnt affect it.

  9. Avatarsampath

    No one virus remove this Ramnit.A virus completely. I have successfully removed this virus in my system without any anitivirus. Any one contact me I will give suggestions to remove this virus completely from your system without any damages. contact email [email protected]

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