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Was Infected With Virtumonde / Used Combofix / Now What?


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#1 Jreg

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Posted 21 April 2008 - 09:58 AM

I have a computer that was infected with virtumonde (among a few other things [users gotta love'em])

anyway I have already manually removed as many of the infected files as well as startup command from the registry
uninstalled spybot S&D and AVG antivirus,
run combofix, and now have a log file (thankfully not very long)

what I am unsure of at this point is if there is anything else that I am supposed to do before reinstalling
the antivirus and spybot.

Thanks in advance for any help.

(Moderator edit: moved post to more appropriate forum. jgweed)

Edited by jgweed, 21 April 2008 - 10:05 AM.


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#2 quietman7

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Posted 21 April 2008 - 10:39 AM

Welcome to BC Jreg

Please note the message text in blue at the top of this forum.

You should not be using Combofix unless instructed to do so by a Malware Removal Expert. It is a powerful tool intended by its creator to be "used under the guidance and supervision of an expert", NOT for private use. Using this tool incorrectly could lead to disastrous problems with your operating system such as preventing it from ever starting again. Please read Combofix's Disclaimer.

Further, ComboFix logs should not to be posted outside the HijackThis forums.

Please print out and follow the instructions for using "Vundofix". -- If using Windows Vista be sure to Run As Administrator.
  • Click the Scan for Vundo button.
  • Once it's done scanning, click the 'Fix Vundo' button.
  • After running VundoFix, a text file named vundofix.txt will automatically be saved to the root of the system drive, usually at C:\vundofix.txt.
  • Please copy & paste the contents of that text file into your next reply.
-- If you receive this error: "Run-time error '339': Component 'comdlg32.ocx' or one its dependencies not correctly registered: a file is missing or invalid", a new copy and instructions on where to put it can be found here.

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 Acan" 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.
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 Jreg

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Posted 21 April 2008 - 12:45 PM

Vundofix found one file [ c:\windows\system32\wvUkiFUo.dll ]

here are the log files

================================================
= VundoFix =
================================================

VundoFix V7.0.3

Scan started at 12:14:40 2008-04-21

Listing files found while scanning....

C:\WINDOWS\system32\wvUkiFUo.dll

Beginning removal...

Attempting to delete C:\WINDOWS\system32\wvUkiFUo.dll
C:\WINDOWS\system32\wvUkiFUo.dll Could not be deleted.

Performing Repairs to the registry.
Done!

Beginning removal...

Performing Repairs to the registry.
Done!

==================
= EOF =
==================




====================
= mbam =
====================
Malwarebytes' Anti-Malware 1.11
Database version: 663

Scan type: Quick Scan
Objects scanned: 33332
Time elapsed: 6 minute(s), 2 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 2
Registry Values Infected: 1
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\{100eb1fd-d03e-47fd-81f3-ee91287f9465} (Adware.Shopping.Report) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{100eb1fd-d03e-47fd-81f3-ee91287f9465} (Adware.Shopping.Report) -> Quarantined and deleted successfully.

Registry Values Infected:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\ShellExecuteHooks\{6d794cb4-c7cd-4c6f-bfdc-9b77afbdc02c} (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\wvUkiFUo.dll (Trojan.Vundo) -> Quarantined and deleted successfully.

=================
= EOF =
=================



as i mentioned before I have already run combofix and have a log file from that as well.
any other thoughts?

jreg

#4 quietman7

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Posted 21 April 2008 - 12:55 PM

Looks like MBAM was able to deal with wvUkiFUo.dll. How is your computer running now? Any more reports/signs of infection?
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#5 Jreg

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Posted 21 April 2008 - 01:00 PM

right now it looks good. i don't see any signs of anything autostarting [ that should not be] in the reg or any other start-up locations.
no unusual processes running
no more attempts to access the network / internet


thanks for the help.

now if you have a cure for users who don't want to listen
bottle and sell it b/c I could sure use some.

Jreg

#6 quietman7

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Posted 21 April 2008 - 01:05 PM

Good job.

If there are no more problems or signs of infection, you should Create a New Restore Point to prevent possible reinfection from an old one. Some of the malware you picked up could have been saved in System Restore. Since this is a protected directory your tools cannot access to delete these files, they sometimes can reinfect your system if you accidentally use an old restore point. Setting a new restore point AFTER cleaning your system will help prevent this and enable your computer to "roll-back" to a clean working state.

The easiest and safest way to do this is:
  • Go to Start > Programs > Accessories > System Tools and click "System Restore".
  • Choose the radio button marked "Create a Restore Point" on the first screen then click "Next". Give the R.P. a name, then click "Create". The new point will be stamped with the current date and time. Keep a log of this so you can find it easily should you need to use System Restore.
  • Then use Disk Cleanup to remove all but the most recently created Restore Point.
  • Go to Start > Run and type: Cleanmgr
  • Click "Ok".
  • Click the "More Options" Tab.
  • Click "Clean Up" in the System Restore section to remove all previous restore points except the newly created one.
Vista Users can refer to these links: Create a New Restore Point and Disk Cleanup.

To protect yourself against malware and reduce the potential for re-infection, be sure to read:
"Simple and easy ways to keep your computer safe".
"How did I get infected?, With steps so it does not happen again!".
"Best Practices - Internet Safety for 2008".
"Hardening Windows Security - Part 1 & Part 2".
"IE Recommended Minimal Security Settings".
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