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Not sure if infected? Stopped AV2009 Popup


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#1 OHCubsFan

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Posted 12 January 2009 - 04:22 PM

One of my users contacted me while using the net. He was using Firefox and had a popup on his screen about Anti-Virus 2009. I quickly did an end-task on his browser, closed his other tasks, and rebooted his PC.

Upon rebooting, I ran Process Explorer and only one suspicious item appeared - a unknown exe file in the c:\windows\temp directory listed as launched by (I think) our anti-virus program. I killed the unknown exe and it was gone. After another reboot, a different named unknown exe in the same directory was listed again in process explorer.

I have scanned the computer with Spybot Search & Destroy, Malwarebytes Antimalware, and it's scanning now with Ad-Aware. Each was updated with the latest signatures before running. Other than finding tracking cookies, they didn't find anything. I also uploaded the suspicious file to virscan.org, and it came up clean.

I took a screenshot of the Process Explorer screen in case that might help....the highlighted process is the one I am suspicious of....

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I THINK he's clean, but I want to make sure...

I also ran a hijack_this scan, but didn't see anything out of the ordinary to me....

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#2 rigel

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Posted 12 January 2009 - 06:19 PM

NTrtScan.exe is a file used by Trend Micro Office Scan. The subfile maybe a temporary process created during the run. One way to test is to temporarily disable Trend and reboot - seeing if the file reappears.

Reference:
http://www.file.net/process/ntrtscan.exe.html
http://www.processlibrary.com/directory/files/ntrtscan/
http://www.liutilities.com/products/wintas...brary/ntrtscan/

Are there any other signs / symptoms that may lend itself to an infection.

"In a world where you can be anything, be yourself." ~ unknown

"Fall in love with someone who deserves your heart. Not someone who plays with it. Will Smith


#3 OHCubsFan

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Posted 13 January 2009 - 06:04 AM

No, that is the only symptom whatsoever that I could find.... just made me nervous since I had stopped the AV2009 Popup and I recall reading somewhere that even just having it appear on your screen (even if you kill the process) can sometimes result in an infection....

I will do as you suggest and report back here.... Thanks!

#4 rigel

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Posted 13 January 2009 - 07:54 AM

Have them run a Malwarebytes scan...

The process of cleaning your computer may require temporarily disabliling some security programs. If you are using SpyBot Search and Destroy, please refer to Note 2 at the bottom of this page.

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 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.
  • 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 may be asked to reboot your computer so it can proceed with the disinfection process. Regardless if prompted to restart the computer or not, please do so immediately. Failure to reboot normally (not into safe mode) will prevent MBAM from removing all the malware.

Note 2:
-- MBAM may make changes to your registry as part of its disinfection routine. If you're using other security programs that detect registry changes (like Spybot's Teatimer), they may interfere with the fix or alert you after scanning with MBAM. Please disable such programs until disinfection is complete or permit them to allow the changes. To disable these programs, please view this topic: How To Temporarily Disable Your Anti-virus, Firewall And Anti-malware Programs

"In a world where you can be anything, be yourself." ~ unknown

"Fall in love with someone who deserves your heart. Not someone who plays with it. Will Smith


#5 OHCubsFan

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Posted 13 January 2009 - 08:45 AM

From my previous reply, "I have scanned the computer with Spybot Search & Destroy, Malwarebytes Antimalware, and it's scanning now with Ad-Aware. Each was updated with the latest signatures before running. Other than finding tracking cookies, they didn't find anything."

I will try your suggestion from the first response shortly, as I am at work now.

Thank you!

#6 OHCubsFan

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Posted 13 January 2009 - 09:01 AM

Ok, I tried your first suggestion of unloading the Trend Micro A/V client, and as soon as it was unloaded, (I was watching on Process Explorer), I could see the "mystery" file exit from memory. Upon reboot, when Trend Micro relaunched, it created a new file in the same temp directory with another seemingly random name. I believe this must be some "work" file they use. I am going to contact them directly to confirm this, but I believe this system is safe.

Thanks again....

#7 OHCubsFan

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Posted 15 January 2009 - 11:27 AM

Ok, I recieved a reply from Trend Micro on my inquiry. I am posting it here for others future enlightenment.

This is to confirmed that the process running with dog icon is Trend Micro's watchdog service. A randomly named process that monitors client status and restarts the client if it is ever disabled. The watchdog service locks Security Server program files, routinely checks client status, and restarts the client automatically if it ever stopped.

Additionally, the watchdog will stop a process that stops the real-time scan process five times. The watchdog renames renegade processes to prevent them from being restarted. Conversely, if a virus/malware program attempts to stop the watchdog, the watchdog will generate a randomly named copy of itself to evade the effort to shut it down.


Thanks again for everyone's help.




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