Vundo Trojan Removal with Symantec

If you are on a network or have a full-time connection to the Internet, such as a DSL or cable modem, disconnect the computer from the network and Internet. Disable or password-protect file sharing, or set the shared files to Read Only, before reconnecting the computers to the network or to the Internet. Because this worm spreads by using shared folders on networked computers, to ensure that the worm does not re-infect the computer after it has been removed, Symantec suggests sharing with Read Only access or by using password protection.

If you are removing an infection from a network, first make sure that all the shares are disabled or set to Read Only.

This tool is not designed to run on Novell NetWare servers. To remove this threat from a NetWare server, first make sure that you have the current virus definitions, and then run a full system scan with the Symantec antivirus product.

How to download and Run Removal Tool

Important: You must have administrative rights to run this tool on Windows NT 4.0, Windows 2000, or Windows XP.

Note for network Administrators:
If you are running MS Exchange 2000 Server, we recommend that you exclude the M drive from the scan by running the tool from a command line, with the Exclude switch.

Follow these steps to download and run the tool:
Download the FixVundo.exe
Save the file to your Windows desktop.
Optional: To check the authenticity of the digital signature, refer to the "Digital signature" section later in this writeup.

Note: If you are sure that you are downloading this tool from the Security Response Web site, you can skip this step. If you are not sure, or are a network administrator and need to authenticate the files before deployment, follow the steps in the "Digital signature" section before proceeding with step 4.

Close all the running programs.

Locate the file that you just downloaded.
Double-click the FixVundo.exe file to start the Removal Tool.
Click Start to begin the process, and then allow the tool to run.

Important: Do not launch any new applications while the tool is running.

• Restart the computer.
• Run the removal tool again to ensure that the system is clean.
• If you are running Windows Me/XP, then re-enable System Restore.
• If you are on a network or if you have a full-time connection to the Internet, reconnect the computer to the network or to the Internet connection.
• Run LiveUpdate to make sure that you are using the most current virus definitions.

When the tool has finished running, you will see a message indicating whether Trojan.Vundo has infected the computer. The tool displays results similar to the following:

• Total number of the scanned files
• Number of deleted files
• Number of terminated viral processes
• Number of terminated viral threads
• Number of fixed registry entries

What the tool does

The Trojan.Vundo Removal Tool does the following:

1. Terminates the Trojan.Vundo processes
2. Deletes the Trojan.Vundo files
3. Deletes the registry values that the Trojan added

Remove Vundo Trojan with Windows Defender

Download Windows Defender from Microsoft

Know About Vundo Trojan

Vundo is a particularly frustrating Trojan horse that causes popups and now and again causes flaws to the computer system by blocking the access to some websites like Google. The Trojan resides in the memory through the Internet browser’s setup program.

On Window’s operating systems, the DLL Trojan files are labeled as eight random upper and lower case characters and reside in the system32 directory. This will create hidden files, which will be located during a virus scanning process, instead of the DLL file itself.
How to remove a Vundo Trojan

There are several ways to get rid of the Vundo Trojan from your system
Manually

Step 1: Locate the Trojan

1. Open the “Start” menu and choose the “Search” option from the list.
2. Check the option “All files or folders” and in the section “All part or part of the file name”, enter “Vundo” in the field file name.
3. Set the option to search through your local drives or in the whole computer system by selcting “Look in: Local Hard Drives” or “Look in: My Computer”
4. Begin the process by clicking “Search”.
5. When the process is done, select the “Vundo” folder found and copy the path into the address bar. You should also save the same path on your clipboard as you will use it to delete the Vundo.
Step 2: Use Registry Editor to eliminate Registry Values

1. Open the Start menu and go to the “Run” option and enter “regedit” and click “OK”
2. Locate and remove the spywares that were searched earlier.
3. To remove the "Vundo" value, right-click and choose the "Delete" option from the list.
4. Browse for and delete "Vundo" registry entries:

HKEY_CURRENT_USERSoftwareMicrosoftInternetExplorerMainActiveState
02F96FB7-8AF6-439B-B7BA-2F952F9E4800

HKEY_LOCAL_MACHINESOFTWAREClassesATLEvents.ATLEvents.1

HKEY_LOCAL_MACHINESOFTWAREClassesATLEvents.ATLEvents
8109AF33-6949-4833-8881-43DCC232B7B2
2316230A-C89C-4BCC-95C2-66659AC7A775

HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurrentVersionRunOnce*[filename]

HKEY_CURRENT_USER SoftwareMicrosoftInternet ExplorerMainActive StateHKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionRunOnce*WinLogon

HKEY_LOCAL_MACHINE SOFTWAREMicrosoftWindows CurrentVersionExplorerBrowser Helper Objects{8109AF33-6949-4833-8881-43DCC232B7B2}

HKEY_LOCAL_MACHINE SOFTWAREMicrosoftWindows CurrentVersionExplorerBrowser Helper Objects{2316230A-C89C-4BCC-95C2-66659AC7A775}

HKEY_LOCAL_MACHINE SOFTWAREMicrosoftWindows CurrentVersionExplorerBrowser Helper Objects{02F96FB7-8AF6-439B-B7BA-2F952F9E4800}

HKEY_LOCAL_MACHINE SOFTWAREClassesCLSID{02F96FB7-8AF6-439B-B7BA-2F952F9E4800}

HKEY_LOCAL_MACHINE SOFTWAREClassesATLEvents.ATLEvents.1

HKEY_LOCAL_MACHINE SOFTWAREClassesATLEvents.ATLEvents

HKEY_CLASSES_ROOTCLSID{8109AF33-6949-4833-8881-43DCC232B7B2}

HKEY_CLASSES_ROOTCLSID{2316230A-C89C-4BCC-95C2-66659AC7A775}

HKEY_LOCAL_MACHINE SoftwareMicrosoftWindows CurrentVersionRunOnce*[filename]

HKEY_CURRENT_USER SoftwareMicrosoftWindows CurrentVersionRunOnce*WinLogon

Step 3: Using Command Prompt for Vundo unregistration

1. Go to the Start Menu and open the Run command.
2. Enter “cmd” and click “OK”
3. Enter “cd” to change the actual directory, leave a blank space and copy the Vundo DLL path saved and press the “Enter” key.
4. For unregistration, paste in the path directory together with "regsvr32 /u" + [DLL_NAME]” and press “Enter”

Download and Use at Your own Risk
Download “Vundo” Trojan Romover Software

Remove Vundo Trojan with Windows Defender

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