Thursday, March 3, 2011

How to Remove WinFixer / Virtumonde / Msevents / Trojan.vundo

This is an old one, it dates back to 2009 but for some reason it has been surfacing once again.  Here is a great resource on how to remove this Trojan if you have it on your computer.  You will probably find that the solution includes running Malware Bytes, (available for safe download through  I hope you find this helpful.  The original information was posted at: – thank you to everyone at Bleeping computer, a great web site for technical help!

What this programs does:

The Vundo family of Trojans is one of the most common infections we find on user's computers. This infection can cause popups that include advertisements for rogue anti-spyware programs. Some common rogue antispyware programs that are advertised include WinFixer, SysProtect and WinAntiSpyware. Users are normally targeted by false positives, fake alerts, and warning of infections on their computer. An example of this type of misleading advertisement would be popups alerting users that they are infected with a blackworm virus. The most common method of infection is through outdated versions of the Sun Java platform; older versions are being exploited so it is important to firstly make sure that your Java software is fully up to date. This infection is normally detectable by users receiving popups when they use the Internet. Your antivirus program might also notify you via an alert that you have a Vundo Trojan on your computer.

The Vundo infection has evolved over time to include harder and harder protection methods so that it cannot be easily removed. These methods are random names, random autorun locations, random CLSIDs, and rootkits to hide these locations from removal tools. Due to this, specialized tools have been created in order to target this specific infection and remove it. The following guide will explain how to use the tool, and hopefully rid your system of this malware.

Threat Classification:

Tools Needed for this fix:

Symptoms that may be in a HijackThis Log:

The file names in these entries are random:
O2 - BHO: (no name) - {904e23fc-67aa-4ac1-89e6-dd4eed16b596} - C:\WINDOWS\system32\zibuzuhu.dll
O4 - HKLM\..\Run: [nohawevufi] Rundll32.exe "C:\WINDOWS\system32\vosevodi.dll",s
O4 - HKLM\..\Run: [7cc01263] rundll32.exe "C:\WINDOWS\system32\ropoligi.dll",b
O4 - HKLM\..\Run: [CPM7ff321ff] Rundll32.exe "c:\windows\system32\kamideva.dll",a
O4 - HKUS\S-1-5-19\..\Run: [nohawevufi] Rundll32.exe "C:\WINDOWS\system32\vosevodi.dll",s (User 'LOCAL SERVICE')
O4 - HKUS\S-1-5-20\..\Run: [nohawevufi] Rundll32.exe "C:\WINDOWS\system32\vosevodi.dll",s (User 'NETWORK SERVICE')
O20 - AppInit_DLLs: C:\WINDOWS\system32\mufezuwi.dll c:\windows\system32\kamideva.dll
O21 - SSODL: SSODL - {EC43E3FD-5C60-46a6-97D7-E0B85DBDD6C4} - c:\windows\system32\kamideva.dll
O22 - SharedTaskScheduler: STS - {EC43E3FD-5C60-46a6-97D7-E0B85DBDD6C4} - c:\windows\system32\kamideva.dll

Guide Updates:

01/09/07 - Updated guide to reflect updates to the tools 11/03/09 - Updated for new removal technique.

Choose the removal method you would like to use:

Automated Removal Instructions for Trojan.vundo and Virtumonde using Malwarebytes' Anti-Malware:

  1. Print out these instructions as we may need to close every window that is open later in the fix.
  2. Before we can do anything we must first end the processes that belong to Trojan.vundo and Virtumonde so that it does not interfere with the cleaning procedure. To do this, download the following file to your desktop. Download Link
  3. Once it is downloaded, double-click on the in order to automatically attempt to stop any processes associated with Trojan.vundo and Virtumonde and other Rogue programs. Please be patient while the programs looks for various programs and closes them. When it has finished, the black window will automatically close. If your desktop was hidden, you should also now be able to view it again. Do not reboot your computer at this point, or the programs will start again.
  4. Now you should download Malwarebytes' Anti-Malware, or MBAM, from the following location and save it to your desktop:
    Malwarebytes' Anti-Malware Download Link
  1. Once downloaded, close all programs and Windows on your computer, including this one.
  2. Double-click on the icon on your desktop named mbam-setup.exe. This will start the installation of MBAM onto your computer.
  3. When the installation begins, keep following the prompts in order to continue with the installation process. Do not make any changes to default settings and when the program has finished installing and is at the last screen, make sure you uncheck both of the Update Malwarebytes' Anti-Malware and Launch Malwarebytes' Anti-Malware check boxes. Then click on the Finish button. If Malwarebytes' prompts you to reboot, please do not do so.
    If you receive a code 2 error while installing Malwarebytes's, please press the OK button to close these errors as we will resolve them in future steps. The code 2 error will look similar to the image below.

Malwarebytes Anti-Malware Screen

  1. As this infection deletes a core executable of Malwarebytes' we will need to download a new copy of it and put it in the C:\program files\Malwarebytes' Anti-Malware\ folder. To download the file please click on the following link:

Malwarebytes' EXE Download

When your browser prompts you where to save it to, please save it to the C:\program files\Malwarebytes' Anti-Malware\ folder. When downloading the file, it will have a random filename. Please leave the filename the way it is as it is important that it is not changed. You may want to write down the name of the file as you will need to know the name in the next step.

  1. Once the file has been downloaded, open the C:\program files\Malwarebytes' Anti-Malware\ folder and double-click on the file you downloaded in step 8. MBAM will now start and you will be at the main program screen as shown below.

Malwarebytes Anti-Malware Screen

  1. Before you can perform a scan, you must first update the program. To do this click on the Update tab, and that at the new screen click on the Check for Updates button. Malwarebytes' will now check for new updates and download and install them as necessary. When the update is completed, you will be prompted with a message stating either that you already have the latest updates or that they have been updated. Either way, you should now click on the OK button to continue.
  2. Now click on the Scanner tab and make sure the the Perform full scan option is selected. Then click on the Scan button to start scanning your computer for Trojan.vundo and Virtumonde related files.
  3. MBAM will now start scanning your computer for malware. This process can take quite a while, so we suggest you go and do something else and periodically check on the status of the scan. When MBAM is scanning it will look like the image below.

Malwarebytes Anti-Malware Scanning Screen

  1. When the scan is finished a message box will appear as shown in the image below.

Malwarebytes Anti-Malware Scan Finished Screen

You should click on the OK button to close the message box and continue with the Trojan.vundo and Virtumonde removal process.

  1. You will now be back at the main Scanner screen. At this point you should click on the Show Results button.
  2. A screen displaying all the malware that the program found will be shown as seen in the image below. Please note that the infections found may be different than what is shown in the image.

Malwarebytes Scan Results

You should now click on the Remove Selected button to remove all the listed malware. MBAM will now delete all of the files and registry keys and add them to the programs quarantine. When removing the files, MBAM may require a reboot in order to remove some of them. If it displays a message stating that it needs to reboot, please allow it to do so. Once your computer has rebooted, and you are logged in, please continue with the rest of the steps.

  1. When MBAM has finished removing the malware, it will open the scan log and display it in Notepad. Review the log as desired, and then close the Notepad window.
  2. You can now exit the MBAM program.

Your computer should now be free of the Trojan.vundo and Virtumonde program. If your current anti-virus solution let this infection through, you may want to consider purchasing the PRO version of Malwarebytes' Anti-Malware to protect against these types of threats in the future.

If you are still having problems with your computer after completing these instructions, then please follow the steps outlined in the topic linked below:

Preparation Guide For Use Before Posting A Hijackthis Log

Automated Removal Instructions for the Vundo or Virtumonde infection using VundoFix:

  1. Please print these instructions as they will be needed later when Internet access is not available.
  2. Save these instructions in word or notepad to the desktop where they can be easily found.
  3. Download Vundo Fix and save it to your desktop.
  4. When it has completed downloading, double-click VundoFix.exe to run it.
  5. Click the Scan for Vundo button.
  6. Once it's done scanning, click the Remove Vundo button.
  7. You will now receive a prompt asking if you want to remove the files, click the YES button. Once you click yes, your desktop will go blank as it starts removing Vundo.
  8. When completed, it will prompt that it will shutdown your computer, click the OK button.
  9. When the computer has shutdown, turn your computer back on.

The WinFixer and Vundo infection should now be removed from your computer.

If you are still having a problem then please perform the following steps:

Note: This step should only be used if the instructions in the previous steps did not remove the infection:

  1. Download VirtumundoBegone and save it to your desktop.
  2. Now reboot into Safe Mode.
    1. This can be done tapping the F8 key as soon as you start your computer
    2. You will be brought to a menu where you can choose to boot into safe mode.
    3. Select safe mode with networking using your arrow keys on the keyboard and then press enter.
    4. When you computer reaches the desktop make sure you log in as the same user which you had performed the previous steps,
  3. Once you are logged into safe mode, double-click VirtumundoBeGone.exe file you just downloaded and follow the instructions.
  4. Exit when it has finished, and reboot back to normal mode.
The WinFixer and Vundo infection should now be removed from your computer.


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