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Spybot S&D scan shows Virtumonde. Now what?


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5 replies to this topic

#1 JayB

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Posted 05 March 2009 - 02:26 PM

I'm running Vista Home Premium, SP1 with Symantec AV 10.2.0.276, Zone Alarm 7.1.254.000, and Spybot S&D 1.5.2. All are updated regularly. My latest Spybot scan indicates Virtumonde referencing C:\windows\system32\zlcommdb.dll. I'm reading all kinds of baddies about Virtumonde, and I think I may need some help getting rid of this one. Several runs with spybot supposedly fixing the problem, it's still there. SAV scans clean. Hope someone can help me out. Thanks in advance.

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#2 extremeboy

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Posted 05 March 2009 - 03:40 PM

Hello.

Please run MBAM and see if it can take care of it for you.

Download and run MalwareBytes Anti-Malware

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.
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.

For complete or visual instructions on installing and running Malwarebytes Anti-Malware please read this link

With regards,
Extremeboy
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#3 JayB

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Posted 06 March 2009 - 06:13 AM

ExtremeBoy-

I'll get that up here soon as I can. I thought I had it cleaned, but no joy.

Okay, here it is. MBAM found a problem that neither Spybot SD or SAS detected, but didn't hit on the C:\windows\system32\zlcommdb.dll as a threat like the Spybot did. Is that maybe a false hit? It looks like it's part of my zone alarm. Anyway, heres the MBAM log.

Malwarebytes' Anti-Malware 1.34
Database version: 1824
Windows 6.0.6001 Service Pack 1

3/6/2009 5:47:51 PM
mbam-log-2009-03-06 (17-47-51).txt

Scan type: Quick Scan
Objects scanned: 57947
Time elapsed: 2 minute(s), 45 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 0
Registry Values Infected: 0
Registry Data Items Infected: 1
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:
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Start_ShowSearch (Hijack.StartMenu) -> Bad: (0) Good: (1) -> Quarantined and deleted successfully.

Folders Infected:
(No malicious items detected)

Files Infected:
(No malicious items detected)

Thanks!

Edited by JayB, 06 March 2009 - 11:57 AM.


#4 extremeboy

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Posted 06 March 2009 - 01:05 PM

Hello.

Yes, that indeed does sound like a false-positive and you are correct that file is related to Zone Alarm. :thumbsup:

http://www.processlibrary.com/directory/files/zlcommdb/

Let's just make sure. submit that file for online analysis and see what comes back.

Submit File to Online Scanner

There is a file that I would like you to check out for me using VirusTotal/VirSCAN
  • Open VirusTotal Online Scanner or VirSCAN. If one site is busy or down, try the other
  • At the top of the page you'll see a box. Paste in the following line(s) (do one line at a time).
  • C:\windows\system32\zlcommdb.dll
  • Click Submit.
  • Wait for the scan to finish.
  • Copy Scanner Results into your next reply.
  • If more than one file was listed, repeat for each of them.
MBAM is a great tool when dealing with vundos or virtumonde infections and other various infections. Sometimes it may not be able to remove some infections, but it still does a great job of removing active infections like vundo that most scanners cannot.

Q: Is that the only problem you are concerned about? Are there any other problems you are encountering? I also suspect it's a false-positive and if it is then you do not need to worry too much on that file that was flagged as "Virtumonde".

With Regards,
Extremeboy
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#5 JayB

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Posted 06 March 2009 - 01:29 PM

Yep, I think it's spybot hitting it as a threat, and it's not really a threat. My system runs fine, all the other scans I've run come clean, so, thanks for your time and expertise.

#6 extremeboy

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Posted 06 March 2009 - 03:35 PM

You're welcome then.

Below are some prevention tips.

Preventing Infections in the Future

Please also have a look at the following links, giving some advice and Tips to protect yourself against malware and reduce the potential for re-infection:
  • Avoid gaming sites, underground web pages, pirated software sites, and peer-to-peer (P2P) file sharing programs. They are a security risk which can make your computer susceptible to a smörgåsbord of malware infections, remote attacks, exposure of personal information, and identity theft. Many malicious worms and Trojans spread across P2P file sharing networks, gaming and underground sites. Users visiting such pages may see innocuous-looking banner ads containing code which can trigger pop-up ads and Flash ads that install viruses, Trojans and spyware. Ads are a target for hackers because they offer a stealthy way to distribute malware to a wide range of Internet users.
Disable Autorun on Flash-Drive/Removable Drives

When is AUTORUN.INF really an AUTORUN.INF?

USB worms work by creating a file called AUTORUN.INF on the root of USB drives. These INF files then use Autorun or Autoplay (not the same thing!) to execute themselves either when the stick is inserted, or more commonly, when the user double-clicks on the USB drive icon from My Computer (Windows Explorer)...


Keeping Autorun enabled on USB and other removable drives has become a significant security risk due to the increasing number of malware variants that can infect them and transfer the infection to your computer. Read USB-Based Malware Attacks and Please disable Autorun asap!.

If using Windows Vista, please refer to:
"Disable AutoPlay in Windows Vista"
"Preventing AutoPlay with Local Group Policy Editor or AutoPlay options panel"

Note: When Autorun is disabled, double-clicking a drive which has autorun.inf in its root directory may still activate Autorun so be careful.

Vist the WindowsUpdate Site Regularly

I recommend you regularly visit the Windows Update Site!
  • Lots of Hacking/Trojans use the methods found (plugged by the updates) that have not been stopped by people not updating.
  • Update ALL Critical updates and any other Windows updates for services/programs that you use.
  • If you wish to turn on automatic updates then you will find here is a nice little article about turning on automatic updates.
  • Note that it will download them for you, but you still have to actually click install.
Update Non-Microsoft Programs

It is also a good idea to check for the latest versions of commonly installed applications that are regularly patched to fix vulnerabilities. You can check these by visiting Secunia Software Inspector and Calendar of Updates.

Update all programs regularly - Make sure you update all the programs you have installed regularly. Without regular updates you WILL NOT be protected when new malicious programs are released.

Follow this list and your potential for being infected again will reduce dramatically.
Finally, and definitely the MOST IMPORTANT step, click on the following tutorial and follow each step listed there:

Simple and easy ways to keep your computer safe and secure on the Internet


Glad I was able to help and thank you for choosing Bleeping Computer as you malware removal source.
Don't forget to tell your friends about us and Good luck :thumbsup:

Happy surfing and good luck! :flowers:

With Regards,
Extremeboy

Note: Please do not PM me asking for help, instead please post it in the correct forum requesting for help. Help requests via the PM system will be ignored.

If I'm helping you and I don't reply within 48 hours please feel free to send me a PM.

The help you receive here is always free but if you wish to show your appreciation, you may wish to Posted Image.




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