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Windows Error Reporting claims that "spooldr.sys" is malware


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7 replies to this topic

#1 Jelly_man

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Posted 20 December 2008 - 04:33 PM

Today I was preparing to shut down my computer, closing programs and such. After choosing start, turn off computer, Shut Down, I was greeted by a blue screen of death, though I didn't read it. Rebooting, Windows told me it had recovered from a serious error and asked me to send a report. I did so, and then Firefox opened up at Microsoft's error reporting system with the following message:

Malware alert: Problem caused by spooldr.sys, which might be malware

Your computer experienced a problem that was caused by spooldr.sys.

This product might be malware.


Kaspersky hasn't warned me of anything, and a recent-ish scan with Spybot didn't flag anything. I can post a Hijackthis log if it would help.

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#2 quietman7

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Posted 21 December 2008 - 12:04 AM

HijackThis logs are not permitted in this forum. The HJT Team members are all volunteers who contribute to helping members as time permits but currently there is a backup and you may have to wait for assistance. However, we may be able to assist you here and resolve this issue without having to post a log so lets try that first.

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. Alternatively, you can update through MBAM's interface from a clean computer, copy the definitions (rules.ref) located in C:\Documents and Settings\All Users\Application Data\Malwarebytes\Malwarebytes' Anti-Malware from that system to a usb stick or CD and then copy it to the infected machine.
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. MBAM may "make changes to your registry" as part of its disinfection routine. If using other security programs that detect registry changes (ie Spybot's Teatimer), they may interfere or alert you after scanning with MBAM. Please temporarily disable such programs or permit them to allow the changes.
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#3 Jelly_man

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Posted 21 December 2008 - 03:35 AM

Hi quietman, thanks for your quick response.

Malwarebytes found no active infections, though I'm not sure if this means I'm clean or not. The log is as follows:

Malwarebytes' Anti-Malware 1.31
Database version: 1528
Windows 5.1.2600 Service Pack 3

21/12/2008 08:33:28
mbam-log-2008-12-21 (08-33-28).txt

Scan type: Quick Scan
Objects scanned: 48348
Time elapsed: 3 minute(s), 30 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)



#4 quietman7

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Posted 21 December 2008 - 11:27 AM

Did you do a physical search of your system for spooldr.sys? If not, please do so.

You can use Windows Search feature > More advanced options to see if the file(s) are still present. To do this, go to Start -> Search and click For Files or Folders... or just press the Windows key + F key on the keyboard.
  • Click All files and folders.
  • Type in the name of the file under "Search by...criteria."
  • Click More advanced options and check these options:
    • "Search system folders"
    • "Search hidden files and folders"
    • "Search subfolders"
  • Then click "Search" to look for the file(s).
Let me know what you find.

Edited by quietman7, 21 December 2008 - 11:29 AM.

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#5 Jelly_man

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Posted 21 December 2008 - 12:07 PM

I have done a search for "spool*" both within Windows and Ubuntu. All I got was legitimate printer drivers and services; I checked each file on Jotti's scanner.

This leads me to believe that the claimed infection was either a false positive, or that the "spooldr" file is loaded into memory from within another file. But that may be me being paranoid.

Today I also did a full rootkit scan with Kaspersky (version 7), which turned up two false positives inside two copies of Combofix. Nothing else was flagged. I have also run F-Secure's Blacklight, which turned up nothing.

Edited by Jelly_man, 21 December 2008 - 12:09 PM.


#6 quietman7

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Posted 21 December 2008 - 12:19 PM

Then for now I wouldn't worry about it. Just keep monitoring your alerts.
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#7 Jelly_man

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Posted 21 December 2008 - 12:21 PM

Alrighty, thanks for your help.

#8 quietman7

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Posted 21 December 2008 - 12:25 PM

You're welcome.
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