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Unknown infection, possibly ZeroAccess?


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16 replies to this topic

#1 kaliu

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Posted 04 July 2012 - 06:07 AM

It started with my computer getting slow to operate and having some odd behaviour at times while browsing (i.e getting redirected). I ran the normal tools (MBAM, SAS) and even combofix (yeah, I know, trying to run before I can walk) and it DID detect something since it said it found some rootkit and had to reboot. Happy as ever I did as instructed but it seems like the infection won't go away, the same files just keep reappearing and I have no idea from where.

I know a GMER log is requested but I can't start it no matter what I try (randomly named .exe's, safe-mode). I get error:

Exception Processing Message c00000013 Parameters 75b4bf7c 4 75b4bf7c 75b4bf7c

as soon as I try to run it.

I have attached DDS, latest ComboFix and MGlogs.

Attached Files



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#2 m0le

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Posted 08 July 2012 - 06:53 PM

Hi,

Welcome to Bleeping Computer. My name is m0le and I will be helping you with your log.
  • Please subscribe to this topic, if you haven't already. Click the Watch This Topic button at the top on the right.

  • Please avoid installing/uninstalling or updating any programs and attempting any unsupervised fixes or scans. This can make helping you impossible.

  • Please reply to this post so I know you are there.
The forum is busy and we need to have replies as soon as possible. If I haven't had a reply after 3 days I will bump the topic and if you do not reply by the following day after that then I will close the topic.

Once I receive a reply then I will return with your first instructions.

Thanks :thumbup2:
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#3 kaliu

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Posted 09 July 2012 - 04:46 AM

I'm here I'm here! :thumbup2:

#4 m0le

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Posted 09 July 2012 - 02:29 PM

We may be looking for a rootkit. Something is bringing back the baddies.

Please download aswMBR ( 511KB ) to your desktop.
  • Double click the aswMBR.exe icon to run it
  • Click the Scan button to start the scan
  • On completion of the scan, click the save log button, save it to your desktop and post it in your next reply.

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#5 kaliu

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Posted 10 July 2012 - 05:27 AM

Here you go sir.

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#6 m0le

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Posted 10 July 2012 - 07:54 AM

It might be that we need to run Combofix again. The malware files deleted are known and should be removeable.

First uninstall the copy you have - which is now out of date

Uninstall ComboFix

Remove Combofix now that we're done with it.
  • Disable any realtime antivirus or antispyware programs.
  • Please press the Windows Key and R on your keyboard. This will bring up the Run... command.
    (For Vista/Windows 7 please click Start -> All Programs -> Accessories -> Run)
  • Now type in Combofix /Uninstall in the runbox and click OK. (Notice the space between "Combofix" and "/")
  • Please follow the prompts to uninstall Combofix.
  • You will then receive a message saying Combofix was uninstalled successfully once it's done uninstalling itself.
This will uninstall Combofix and anything associated with it.


Then download, install and run a copy as shown

Please download ComboFix from one of these locations:* IMPORTANT !!! Save ComboFix.exe to your Desktop making sure you rename it comfix.exe
  • Disable your AntiVirus and AntiSpyware applications including Firewalls, usually via a right click on the System Tray icon. They may otherwise interfere with our tools. (Click on this link to see a list of programs that should be disabled. The list is not all inclusive.)
  • Double click on Comfix.exe & follow the prompts.
  • As part of it's process, ComboFix will check to see if the Microsoft Windows Recovery Console is installed. With malware infections being as they are today, it's strongly recommended to have this pre-installed on your machine before doing any malware removal. It will allow you to boot up into a special recovery/repair mode that will allow us to more easily help you should your computer have a problem after an attempted removal of malware.
  • Follow the prompts to allow ComboFix to download and install the Microsoft Windows Recovery Console, and when prompted, agree to the End-User License Agreement to install the Microsoft Windows Recovery Console.
**Please note: If the Microsoft Windows Recovery Console is already installed, ComboFix will continue it's malware removal procedures.

Posted Image


Once the Microsoft Windows Recovery Console is installed using ComboFix, you should see the following message:

Posted Image


Click on Yes, to continue scanning for malware.

When finished, it shall produce a log for you. Please include the C:\ComboFix.txt in your next reply.
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#7 kaliu

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Posted 10 July 2012 - 08:57 AM

I followed your instructions, saved combofix as comfix.exe and installed the recovery console.

Some observations when I ran it this time:
  • ComboFix didn't warn me of a rootkit and asked me to reboot as soon as I launched it.
  • The usual deletions of the .exe files is nowhere to be found in the log
  • ComboFix didn't tell me to reboot, nor did it do it automatically.

I'm so hopelessly confused, here's the log.

Attached Files



#8 m0le

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Posted 10 July 2012 - 11:20 AM

Combofix hasn't found anything because the previous log shows that Combofix has already removed the problems as I suspected.

Please run MBAM next

Please download Posted Image Malwarebytes Anti-Malware and save it to your desktop.
  • Make sure you are connected to the Internet.
  • Double-click on mbam-setup.exe to install the application or, if you are using Vista, right-click and select Run As Administrator 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 MBAM won't update then download and update MBAM on a clean computer then save the rules.ref folder to a memory stick. This file is found here: 'C:\Documents and Settings\All Users\Application Data\Malwarebytes\Malwarebytes' Anti-Malware' then transfer it across to the infected computer.
  • On the Scanner tab:
    • Make sure the "Perform Full 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 you're using other security programs that detect registry changes, they may alert you after scanning with MBAM. Please permit the program to allow the changes.
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#9 kaliu

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Posted 11 July 2012 - 05:36 AM

Good evening! MBAM didn't seem to find anything, here's the log.

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#10 m0le

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Posted 11 July 2012 - 07:27 PM

It's encouraging. Let's give ESET a run now. This takes some time but it searches a great many areas and provides me with a history of what may have gone on. I'll explain later, if this is the case here.

I'd like us to scan your machine with ESET OnlineScan
  • Hold down Control and click on the following link to open ESET OnlineScan in a new window.
    ESET OnlineScan
  • Click the Posted Image button.
  • For alternate browsers only: (Microsoft Internet Explorer users can skip these steps)
    • Click on Posted Image to download the ESET Smart Installer. Save it to your desktop.
    • Double click on the Posted Image icon on your desktop.
  • Check Posted Image
  • Click the Posted Image button.
  • Accept any security warnings from your browser.
  • Under scan settings, check Posted Image and check Remove found threats
  • Click Advanced settings and select the following:
    • Scan potentially unwanted applications
    • Scan for potentially unsafe applications
    • Enable Anti-Stealth technology
  • ESET will then download updates for itself, install itself, and begin scanning your computer. Please be patient as this can take some time.
  • Copy and paste the resulting log in your next reply
If no log is generated that means nothing was found. Please let me know if this happens.

If you think a log should have been generated then go to C:\Program Files\ESET\ESET Online Scanner\log.txt to find it.
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#11 kaliu

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Posted 12 July 2012 - 06:07 AM

It found some baddies; here it is:

C:\MGtools\Process.exe Win32/PrcView application cleaned by deleting - quarantined
C:\System Volume Information\_restore{5B683D1E-54C6-4275-8749-F40763EA9594}\RP3\A0000531.exe Win32/PrcView application deleted - quarantined
C:\System Volume Information\_restore{5B683D1E-54C6-4275-8749-F40763EA9594}\RP3\A0000532.exe probably a variant of Win32/SecurityStronghold application cleaned by deleting - quarantined
C:\System Volume Information\_restore{5B683D1E-54C6-4275-8749-F40763EA9594}\RP3\A0000533.exe Win32/PrcView application cleaned by deleting - quarantined



#12 m0le

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Posted 12 July 2012 - 05:50 PM

It found one potentially unwanted or unsafe item and three copies of it in the system restore. All now removed.

How does the machine run now?
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#13 kaliu

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Posted 13 July 2012 - 04:12 AM

Boots fine, runs fine, no hangups and no suspicious behaviour as far as I can tell. :wink:

#14 m0le

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Posted 13 July 2012 - 06:39 PM

Looks good to go...

I am going to wrap this up, if anything happens in the next five days then come back to me but we need to clear up

You're clean. Good stuff! :thumbup2:

Let's do some clearing up

If you used DeFogger now is the time to enable your CD emulation software again.

Uninstall ComboFix

Remove Combofix now that we're done with it.
  • Please press the Windows Key and R on your keyboard. This will bring up the Run... command.
    (For Vista/Windows 7 please click Start -> All Programs -> Accessories -> Run)
  • Now type in Combofix /Uninstall in the runbox and click OK. (Notice the space between "Combofix" and "/")
  • Please follow the prompts to uninstall Combofix.
  • You will then receive a message saying Combofix was uninstalled successfully once it's done uninstalling itself.
This will uninstall Combofix and anything associated with it.


We Need to Clean Up our Mess
Download and Run OTC

We will now remove the tools we used during this fix using OTC.

  • Download OTC by OldTimer and save it to your desktop.
  • Double click Posted Image icon to start the program. If you are using Vista, please right-click and choose run as administrator
  • Then Click the big Posted Image button.
  • You will get a prompt saying "Begin Cleanup Process". Please select Yes.
  • Restart your computer when prompted.
If you still have any tools or logs leftover on your computer you can go ahead and delete those off of your computer now.
------------------------------------------------------------------------------------------------------------------------

Here's some advice on how you can keep your PC clean


Use and update your AntiVirus Software

You must have a good antivirus. There are plenty to choose from but I personally recommend the free options of Avast and Avira Antivir - though if you choose Avira you should make sure that you uncheck the box offering to install the Ask toolbar. If you want to purchase a security program then I recommend any of the following: AVG, Norton, McAfee, Kaspersky and ESET Nod32.

It is imperative that you update your Antivirus software at least once a week (Even more if you wish). If you do not update your antivirus software then it will not be able to catch any of the new variants that may come out. If you use a commercial antivirus program you must make sure you keep renewing your subscription. Otherwise, once your subscription runs out, you may not be able to update the programs virus definitions.


Make sure your applications have all of their updates

Use this next program to check for updates for programs already on your system. Download Security Check by screen317 from here
  • Save it to your Desktop.
  • Double click SecurityCheck.exe and follow the onscreen instructions inside of the black box.
  • A Notepad document should open automatically, make sure that updates on any that are flagged are carried out as soon as possible

It is also possible for other programs on your computer to have security vulnerability that can allow malware to infect you. Therefore, 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.


Install an AntiSpyware Program

A highly recommended AntiSpyware program is SuperAntiSpyware. You can download the free Home Version. or the Pro version for a 15 day trial period.

Installing this or another recommended program will provide spyware & hijacker protection on your computer alongside your virus protection. You should scan your computer with an AntiSpyware program on a regular basis just as you would an antivirus software.


Finally, here's a treasure trove of antivirus, antimalware and antispyware resources


That's it Kaliu, happy surfing!

Cheers.

m0le
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#15 kaliu

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Posted 14 July 2012 - 05:57 AM

Thank you so much for your assistance. The general tips about keeping my PC secure won't fall on deaf ears either. I'll buy you a couple of beers at the end of this month. (Or at least pay for 'em!).

Again, thank you so much! :thumbsup:




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