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MBR or rootkit virus?


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#1 kennym26

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Posted 12 March 2012 - 11:35 AM

System is XP home version 2002 SP3
2 seperate hard drives

My problems started when visiting a website and AVG antivirus detected and supposedly quarantined Exploit Blackhole virus. Afterwards firefox browser started redirecting to different sites. I shut firefox down and ran AVG scan, it found several trojans that it removed. I restarted the PC and still had pop ups from AVG blocking trojans. After using Malwarebytes, spyware blaster, advanced system care5, and microsoft malicous software removal tool, I restarted and started getting Microsoft development enviornment windows pop up saying problem running a script or something.
I then used Barts pe cd to boot and then Drive Image XML to restore a previous good image to my C drive only. I did not restore the D system drive or a 2nd hard drive named I in the system. On restart I still get the Microsoft Development enviornment pop ups and after virus scanning again it found a few more things.

I should have maybe documented everything as it happened but thought it would be clean by now. I do remember seeing these.
Exploit blackhole
Pihar.b
IRP hook driver........
various trojans and some in system restore directories

I am afraid to use the pc for anything substantial until I know it's clean and I am in the process of copying personal files to an external hard drive and DVD from safe mode.
Should I worry about the virus transferring to the external hd or to my laptop if I hook up the ext drive to it afterwards?

I have read through the forums here and elsewhere but still not sure how to tell what's going on in my pc.

Thanks for any and all help!

Ken

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#2 boopme

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Posted 12 March 2012 - 11:51 AM

Hello,please do these next.

Download the FixTDSS.exe

Save the file to your Windows desktop.
Close all running programs.
If you are running Windows XP, turn off System Restore. How to turn off or turn on Windows XP System Restore
Double-click the FixTDSS.exe file to start the removal tool.
Click Start to begin the process, and then allow the tool to run.
Restart the computer when prompted by the tool.
After the computer has started, the tool will inform you of the state of infection (make sure to let me know what it said)
If you are running Windows XP, re-enable System Restore.


Rerun MBAM (MalwareBytes) like this:

Open MBAM in normal mode and click Update tab, select Check for Updates,when done
click Scanner tab,select Quick scan and scan (normal mode).
After scan click Remove Selected, Post new scan log and Reboot into normal mode.



To check for and confirm the MBR (Master Boot Record) rootkit.


Please download mbr.exe and save it to the root directory, usually C:\ <- (Important!).
  • Go to Start > Run and type: cmd.exe
  • press Ok.
  • At the command prompt type: c:\mbr.exe >>"C:\mbr.log"
  • press Enter.
  • The process is automatic...a black DOS window will open and quickly disappear. This is normal.
  • A log file named mbr.log will be created and saved to the root of the system drive (usually C:\).
  • Copy and paste the results of the mbr.log in your next reply.
If you have a problem using the command prompt, you can just double-click on mbr.exe to run the tool.
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#3 kennym26

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Posted 12 March 2012 - 02:48 PM

Thanks for the quick reply!

This didn't seem to come up with anything. And I have not gotten the popups again.
Is it possible that the 2nd internal hard drive or system recovery partition could have something on them?
Or maybe all the stuff I ran finally killed whatever was there.
Do you have any other ideas or test I could run to be sure it's clean before I start using it?

Thanks again.


fixtdss said no backdoor found.


Malwarebytes Anti-Malware 1.60.1.1000
www.malwarebytes.org

Database version: v2012.03.12.05

Windows XP Service Pack 3 x86 NTFS
Internet Explorer 7.0.5730.13
Owner :: KM-DESKTOP [administrator]

3/12/2012 2:04:32 PM
mbam-log-2012-03-12 (14-04-32).txt

Scan type: Quick scan
Scan options enabled: Memory | Startup | Registry | File System | Heuristics/Extra | Heuristics/Shuriken | PUP | PUM
Scan options disabled: P2P
Objects scanned: 239832
Time elapsed: 8 minute(s), 12 second(s)

Memory Processes Detected: 0
(No malicious items detected)

Memory Modules Detected: 0
(No malicious items detected)

Registry Keys Detected: 0
(No malicious items detected)

Registry Values Detected: 0
(No malicious items detected)

Registry Data Items Detected: 0
(No malicious items detected)

Folders Detected: 0
(No malicious items detected)

Files Detected: 0
(No malicious items detected)

(end)


Stealth MBR rootkit/Mebroot/Sinowal/TDL4 detector 0.4.2 by Gmer, http://www.gmer.net
Windows 5.1.2600 Disk: ST3120023A rev.3.31 -> Harddisk0\DR0 -> \Device\Ide\IdeDeviceP0T0L0-4

device: opened successfully
user: MBR read successfully
kernel: MBR read successfully
user & kernel MBR OK

#4 boopme

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Posted 12 March 2012 - 06:35 PM

Ok, these look OK. Can you run these all on the other drive. A Full MBAM scan will scan all connected drives.
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#5 kennym26

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Posted 13 March 2012 - 09:50 AM

The other drives scan came up with nothing.
I think the problem is solved and thanks for your help!

#6 boopme

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Posted 13 March 2012 - 05:14 PM

You're welcome.
If there are no more problems or signs of infection, 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 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.

Tips to protect yourself against malware and reduce the potential for re-infection:Avoid gaming sites, pirated software, cracking tools, keygens, 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 malicious 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. The best way to reduce the risk of infection is to avoid these types of web sites and not use any P2P applications. Read P2P Software User Advisories and Risks of File-Sharing Technology.

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. To learn more about this risk, please read:
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




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