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Computer freezes with AV scan or Internet Access [Moved]


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#1 knowthycomp

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Posted 19 July 2009 - 02:05 PM

Hi all,

Sorry for posting this again, I didn't get any reply. Please see it this makes any sense. Thanks

My desktop (Win XP pro, SP 3) recently seemed to have some big issues. I downloaded some video files and the next day after using some programs and having the browser open for sometime, the computer froze. I had to restart many times and it kept happening. Then I started an AV scan with Trend Micro. The scan got stuck at one particular file (some file that was created before this happened with I compiled some VC++ program). So, I thought that file might be infected and I cut and pasted that file elsewhere. Then again the scan get stuck at another file in the same directory. If I kept the scan on for some more time the computer again froze. If I didn't include this directory in the folders to be scanned, the AV scanner doesn't show any progress at all - gets stuck at 0% progress. When I try to scan for spyware etc. using Ad-Aware or Spybot the computer again froze. So, I restarted the computer in Safe mode and did the virus scan, but the same result. I also tried to scan using AVG scanner (of course uninstalling Trend Micro), but for the same outcome - froze after some time (few hours with AVG).

After reading in some forums, I found few external AV scanning programs like Clamwin, McAfee stinger. Clamwin finally found one Trojan userinit. But it seemed like it didn't remove the file since, I could see the file. Then I found that it is a system process, so I was foolish enough and scanned using ComboFix so that it might restore the file - without anybody's advice. I could not make any head or tail of the log file. But again I didn't find any mention of userinit.exe in it. Can somebody please look at these log files and let me know what the status of my comp is ?

Note:
1. In the safe mode, if I do not open the browser or use an AV scanner to scan files, the computer did not freeze.
2. I did not find any unusual pop-ups or icon on my computer desktop. But sometimes the ethernet connection didn't seem to work even though the cable is connected and I could see the "light blinking" in the cable socket at the back of the computer. After I unplug the cable and plug it back in, the connection was on again.
3. A couple of times I got a standard Windows system tray pop-up saying that the computer does not have AV scanner, even though I could see the AV (Trend Micro) icon beside the pop-up message.

Please help me asap, I really need this computer to be fixed.

Thank you very much

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#2 boopme

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Posted 19 July 2009 - 03:38 PM

Hi, let's see what MBAM says.

Please run these next. If you have Spybot installed temporarily disable it.
Next run ATF:
Note: On Vista, "Windows Temp" is disabled. To empty "Windows Temp" ATF-Cleaner must be "Run as an Administrator".

Please download ATF Cleaner by Atribune & save it to your desktop.
  • Double-click ATF-Cleaner.exe to run the program.
  • Under Main "Select Files to Delete" choose: Select All.
  • Click the Empty Selected button.
  • If you use Firefox browser click Firefox at the top and choose: Select All
  • Click the Empty Selected button.
    If you would like to keep your saved passwords, please click No at the prompt.
  • If you use Opera browser click Opera at the top and choose: Select All
  • Click the Empty Selected button.
    If you would like to keep your saved passwords, please click No at the prompt.
  • Click Exit on the Main menu to close the program.

Next run MBAM (MalwareBytes):

NOTE: Before saving MBAM please rename it to zztoy.exe....now save it to your desktop.

Please download Malwarebytes Anti-Malware and save it to your desktop.
alternate download link 1
alternate download link 2

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. Temporarily disable such programs or permit them to allow the changes.
  • 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 definition 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. Be sure to post the complete log to include the top portion which shows MBAM's database version and your operating system.
  • Exit MBAM when done.
Note: If MBAM encounters a file that is difficult to remove, you will be asked to reboot your computer so MBAM can proceed with the disinfection process. If asked to restart the computer, please do so immediately. Failure to reboot normally (not into safe mode) will prevent MBAM from removing all the malware.
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#3 knowthycomp

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Posted 20 July 2009 - 09:34 AM

Hi,
Thanks a ton for your reply. Like you said, first I used ATF Cleaner and then MBAM. MBAM did not find any infections the log can be seen below. You probably already know that I used Combofix (after reading some of the forum posts and before posting) which might have cleaned things. Let me know if you want to look at the Combofix log.

As garmanma suggested in my earlier post (http://www.bleepingcomputer.com/forums/t/242705/computer-freezes-with-av-scan-or-internet-access/?p=1346721), I'll scan using SuperAntiSpyware and post the results.

Thank you

Malwarebytes' Anti-Malware 1.39
Database version: 2466
Windows 5.1.2600 Service Pack 3

7/20/2009 10:20:03 AM
mbam-log-2009-07-20 (10-20-03).txt

Scan type: Quick Scan
Objects scanned: 122199
Time elapsed: 5 minute(s), 0 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 knowthycomp

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Posted 20 July 2009 - 11:23 AM

The following is the SAS scan log:

SUPERAntiSpyware Scan Log
http://www.superantispyware.com

Generated 07/20/2009 at 12:06 PM

Application Version : 4.26.1006

Core Rules Database Version : 4004
Trace Rules Database Version: 1944

Scan type : Complete Scan
Total Scan Time : 01:08:23

Memory items scanned : 278
Memory threats detected : 0
Registry items scanned : 16443
Registry threats detected : 0
File items scanned : 44832
File threats detected : 1

Adware.Tracking Cookie
C:\WINDOWS\system32\config\systemprofile\Cookies\system@ad.primopdf[2].txt

#5 boopme

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Posted 20 July 2009 - 12:53 PM

Looks like you got it.. If there are no more signs of infection then.....
Now 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 backed up, renamed and 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". Disk Cleanup will scan your files for several minutes, then open.
  • Click the "More Options" tab, then click the "Clean up" button under System Restore.
  • Click Ok. You will be prompted with "Are you sure you want to delete all but the most recent restore point?"
  • Click Yes, then click Ok.
  • Click Yes again when prompted with "Are you sure you want to perform these actions?"
  • Disk Cleanup will remove the files and close automatically.
Vista Users can refer to these links: Create a New Restore Point and Disk Cleanup.
How do I get help? Who is helping me?For the time will come when men will not put up with sound doctrine. Instead, to suit their own desires, they will gather around them a great number of teachers to say what their itching ears want to hear....Become a BleepingComputer fan: Facebook

#6 knowthycomp

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Posted 20 July 2009 - 03:25 PM

Thanks for your help, boopme.

I did what you suggested. But unfortunately the computer froze again after I opened the browser for a little while. It seems to be happening only when the browser is on. I rebooted the computer in safe mode and tried to use the virus scanner (I installed Trend Micro again), and again I see no progress in the scanner...

This seems to be some mystery virus... can you or somebody please help !!

#7 boopme

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Posted 20 July 2009 - 03:36 PM

The best solution now is to run HJT/DDS.
Please follow this guide. go and do steps 6 and 7 ,, Preparation Guide For Use Before Using Hijackthis. Then go here HijackThis Logs and Virus/Trojan/Spyware/Malware Removal ,click New Topic,give it a relevant Title and post that complete log.

Let me know if it went OK.
How do I get help? Who is helping me?For the time will come when men will not put up with sound doctrine. Instead, to suit their own desires, they will gather around them a great number of teachers to say what their itching ears want to hear....Become a BleepingComputer fan: Facebook

#8 garmanma

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Posted 20 July 2009 - 04:51 PM

Sorry for posting this again, I didn't get any reply. Please see it this makes any sense. Thanks


Yes you did. You just need the time to look instead of multiple posting
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#9 Orange Blossom

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Posted 21 July 2009 - 10:42 PM

Hello,

Now that you have posted a log here: http://www.bleepingcomputer.com/forums/t/243088/computer-freezes-when-browser-is-open/ you should NOT make further changes to your computer (install/uninstall programs, use special fix tools, delete files, edit the registry, etc) unless advised by a HJT Team member, nor should you ask for help elsewhere. Doing so can result in system changes which may not show in the log you already posted. Further, any modifications you make on your own may cause confusion for the helper assisting you and could complicate the malware removal process which would extend the time it takes to clean your computer.

From this point on the HJT Team should be the only members that you take advice from, until they have verified your log as clean.

Please be patient. It may take a while to get a response because the HJT Team members are EXTREMELY busy working logs posted before yours. They are volunteers who will help you out as soon as possible. Once you have made your post and are waiting, please DO NOT make another reply until it has been responded to by a member of the HJT Team. Generally the staff checks the forum for postings that have 0 replies as this makes it easier for them to identify those who have not been helped. If you post another response there will be 1 reply. A team member, looking for a new log to work may assume another HJT Team member is already assisting you and not open the thread to respond. Please be patient. It may take a while to get a response but your log will be reviewed and answered as soon as possible

To avoid confusion, I am closing this topic. Good luck with your log.

Orange Blossom :thumbsup:
Help us help you. If HelpBot replies, you MUST follow step 1 in its reply so we know you need help.

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