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Question Concerning Vundo.


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#1 anddwhyy

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Posted 08 July 2008 - 04:56 PM

I recently got a notification about vundo but i don't have any popups or other major problems. I even ran Vundofix but it didn't detect anything.
But when i run a Windows Defender scan, i get a notification of a severe/high alert item which is Trojan:Win32/Vundo.gen!R.
I try to remove it but i get an error and it doesn't remove.
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Is there a problem? And if there is, how can i fix it?

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#2 quietman7

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Posted 08 July 2008 - 05:03 PM

Some variants of Vundo can be difficult to remove. A lot of scanners will find the malware but cannot completely remove it.

Please download Malwarebytes Anti-Malware and save it to your desktop.
alternate download link 1
alternate download link 2
  • Make sure you are connected to the Internet.
  • Double-click on Download_mbam-setup.exe to install the application.
  • When the installation begins, follow the prompts and do not make any changes to default settings.
  • When installation has finished, make sure you leave both of these checked:
    • Update Malwarebytes' Anti-Malware
    • Launch Malwarebytes' Anti-Malware
  • Then click Finish.
MBAM will automatically start and you will be asked to update the program before performing a scan.
  • If an update is found, the program will automatically update itself.
  • Press the OK button to close that box and continue.
  • If you encounter any problems while downloading the updates, manually download them from here and just double-click on mbam-rules.exe to install.
On the Scanner tab:
  • Make sure the "Perform Quick Scan" option is selected.
  • Then click on the Scan button.
  • If asked to select the drives to scan, leave all the drives selected and click on the Start Scan button.
  • The scan will begin and "Scan in progress" will show at the top. It may take some time to complete so please be patient.
  • When the scan is finished, a message box will say "The scan completed successfully. Click 'Show Results' to display all objects found".
  • Click OK to close the message box and continue with the removal process.
Back at the main Scanner screen:
  • Click on the Show Results button to see a list of any malware that was found.
  • Make sure that everything is checked, and click Remove Selected.
  • When removal is completed, a log report will open in Notepad and you may be prompted to restart your computer. (see Note below)
  • The log is automatically saved and can be viewed by clicking the Logs tab in MBAM.
  • Copy and paste the contents of that report in your next reply and exit MBAM.
Instructions with screenshots if needed.

Note: If MBAM encounters a file that is difficult to remove, you will be presented with 1 of 2 prompts. Click OK to either and let MBAM proceed with the disinfection process. If asked to restart the computer, please do so immediately. Failure to reboot will prevent MBAM from removing all the malware.
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#3 anddwhyy

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Posted 08 July 2008 - 05:22 PM

Ok i ran the scan and here is my log.

Malwarebytes' Anti-Malware 1.20
Database version: 933
Windows 6.0.6001 Service Pack 1

3:12:35 PM 7/8/2008
mbam-log-7-8-2008 (15-12-35).txt

Scan type: Quick Scan
Objects scanned: 40237
Time elapsed: 4 minute(s), 15 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 1
Registry Values Infected: 2
Registry Data Items Infected: 0
Folders Infected: 0
Files Infected: 1

Memory Processes Infected:
(No malicious items detected)

Memory Modules Infected:
(No malicious items detected)

Registry Keys Infected:
HKEY_CLASSES_ROOT\CLSID\{7e6b5923-3d2d-46df-8b07-84f48bfb55ec} (Trojan.Vundo) -> Quarantined and deleted successfully.

Registry Values Infected:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MSServer (Trojan.Agent) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\ShellExecuteHooks\{7e6b5923-3d2d-46df-8b07-84f48bfb55ec} (Trojan.Vundo) -> Quarantined and deleted successfully.

Registry Data Items Infected:
(No malicious items detected)

Folders Infected:
(No malicious items detected)

Files Infected:
C:\Windows\System32\jkkLBuVo.dll (Trojan.Agent) -> Delete on reboot.

I rebooted and got a RunDLL that says:
Error loading C:\windows\system32\jkkLBuVo.dll
C:\windows\system32\jkkLBuVo.dll is not a valid Win32 application.

I think that is a good thing. So am i good to go?
Thanks for you help.

#4 quietman7

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Posted 08 July 2008 - 09:29 PM

It's not unusual to receive such an error after using tools to remove malware infection.

RunDLL32.exe is a legit Windows file that loads .dll files which too can be legit or malware related. A RunDLL "Error loading..." message usually occurs when the .dll file(s) that was set to run at startup has been deleted and it becomes an orphaned registry entry. Windows is trying to load this file(s) but cannot locate it since the file was removed during the MBAM scan. However, the associated registry entry remains and is telling Windows to load the file when you boot up. Since the file no longer exists, Windows will display an error message. You need to remove this registry entry so Windows stops searching for the file when it loads.

To resolve this, download Autoruns, search for the related entry and then delete it.
  • Create a new folder on your hard drive called AutoRuns (C:\AutoRuns) and extract (unzip) the file there. (click here if you're not sure how to do this.)
  • Open the folder and double-click on autoruns.exe to launch it.
  • Please be patient as it scans and populates the entries.
  • When done scanning, it will say Ready at the bottom.
  • Scroll through the list and look for a startup entry related to the file(s) in the error message.
  • Right-click on the entry and choose delete.
  • Reboot your computer and see if the startup error returns.
Also rescan again with MBAM and post a new log.
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#5 anddwhyy

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Posted 08 July 2008 - 11:25 PM

I ran Autoruns and the dll wasn't there.
I rebooted and no error came up.
I ran MBAM again and

Malwarebytes' Anti-Malware 1.20
Database version: 933
Windows 6.0.6001 Service Pack 1

9:22:30 PM 7/8/2008
mbam-log-7-8-2008 (21-22-30).txt

Scan type: Quick Scan
Objects scanned: 40548
Time elapsed: 4 minute(s), 33 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 0
Registry Values Infected: 0
Registry Data Items Infected: 0
Folders Infected: 0
Files Infected: 0

Memory Processes Infected:
(No malicious items detected)

Memory Modules Infected:
(No malicious items detected)

Registry Keys Infected:
(No malicious items detected)

Registry Values Infected:
(No malicious items detected)

Registry Data Items Infected:
(No malicious items detected)

Folders Infected:
(No malicious items detected)

Files Infected:
(No malicious items detected)

Thanks so much :D.

#6 quietman7

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Posted 09 July 2008 - 06:14 AM

How is your computer running now? Any more reports/signs of infection?
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