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Aluroot/TR/Rootkit.Gen2 in netbt.sys


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7 replies to this topic

#1 cjfling

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Posted 01 May 2012 - 09:31 AM

This computer started showing signs of spyware infection and so I started scanning. Using a combination of MBAM/Spybot/Hijackthis/TDSkiller/RemoveFakeAntivirus/Unhide I was able to remove TDS, FakeAV, and etc in Safe Mode on XP Home SP3. Had installed a current version of AVG and it began detecting the netbt.sys infection, but I can't remember what AVG called the infection. I removed AVG per the Combofix warning and have since ran the initial scan of Combofix for the log file per the instruction on this website. Please see the attached log. I do use a proxy server so ignore those entries.

Thx!

Attached Files

  • Attached File  log.txt   14KB   5 downloads

Edited by cjfling, 01 May 2012 - 10:28 AM.


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#2 CatByte

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Posted 01 May 2012 - 09:27 PM

Hi,

Please do the following:

  • Very Important! Temporarily disable your anti-virus, script blocking and any anti-malware real-time protection before following the steps below.
  • They can interfere with ComboFix or remove some of its embedded files which may cause "unpredictable results".
Copy/paste the text inside the Codebox below into notepad:

Here's how to do that:
Click Start > Run type Notepad click OK.
This will open an empty notepad file:

Copy all the text inside of the code box - Press Ctrl+C (or right click on the highlighted section and choose 'copy')

http://www.bleepingcomputer.com/forums/topic452086.html

Driver::
U

Collect::
c:\docume~1\Reginald\LOCALS~1\Temp\U.exe

NetSvc::
wg4n
nfmservice
nsengine
TClass2k
ixiaendpoint
wwsecsvc
sentinel
s616bus
tga
itchfltr
ProcObsrv
w800mdm
ikfileflt

Atjob::

ClearJavaCache::

Now paste the copied text into the open notepad - press CTRL+V (or right click and choose 'paste')

Save this file to your desktop, Save this as "CFScript"


Here's how to do that:

1.Click File;
2.Click Save As... Change the directory to your desktop;
3.Change the Save as type to "All Files";
4.Type in the file name: CFScript
5.Click Save ...

Posted Image
  • Referring to the screenshot above, drag CFScript.txt into ComboFix.exe.
  • ComboFix may request an update; please allow it.
  • ComboFix will now run a scan on your system. It may reboot your system when it finishes. This is normal.
  • When finished, it shall produce a log for you.
  • Copy and paste the contents of the log in your next reply.

CAUTION: Do not mouse-click ComboFix's window while it is running. That may cause it to stall.

**Note**

When CF finishes running, the ComboFix log will open along with a message box--do not be alarmed. With the above script, ComboFix will capture files to submit for analysis.
  • Ensure you are connected to the internet and click OK on the message box.


NEXT

Please download TDSSKiller.zip
  • Extract it to your desktop
  • Double click TDSSKiller.exe
  • when the window opens, click on Change Parameters
  • under ”Additional options”, put a check mark in the box next to “Detect TDLFS File System”
  • click OK
  • Press Start Scan
    • If Malicious objects are found then ensure Cure is selected
    • If TDLFS File System is found then ensure Delete is selected
    • Then click Continue > Reboot now
  • Copy and paste the log in your next reply
    • A copy of the log will be saved automatically to the root of the drive (typically C:\)

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#3 cjfling

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Posted 02 May 2012 - 09:08 AM

Thanks for your response. Attached are the two new logs. At first I wasn't sure if the drag of the CFScript.txt created file onto ComboFix worked because I didn't see the progress indicator shown the way it does in the instructions on your GIF. After ComboFix finished the CFScript.txt file was missing from my desktop, so I guess it worked fine.

I'm trying to learn about using ComboFix more and have seen other posts you made using it. Is the stuff you put in the text file always the same or copied from the initial ComboFix log? Are you having to interpret something or just copying?

Thanks again

Attached Files


Edited by cjfling, 02 May 2012 - 09:20 AM.


#4 CatByte

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Posted 02 May 2012 - 05:29 PM

Hi,

Please do the following:

Please download Malwarebytes' Anti-Malware
  • Double Click mbam-setup.exe to install the application.
  • Make sure a checkmark is placed next to Update Malwarebytes' Anti-Malware and Launch Malwarebytes' Anti-Malware, then click Finish.
  • If an update is found, it will download and install the latest version.
  • Once the program has loaded, select "Perform Quick Scan", then click Scan.
  • The scan may take some time to finish, so please be patient.
  • When the scan is complete, click OK, then Show Results to view the results.
  • Make sure that everything is checked, and click Remove Selected. <-- very important
  • When disinfection is completed, a log will open in Notepad and you may be prompted to Restart. (See Extra Note)
  • The log is automatically saved by MBAM and can be viewed by clicking the Logs tab in MBAM.
  • Copy&Paste the entire report in your next reply.

Extra Note:If MBAM encounters a file that is difficult to remove, you will be presented with 1 of 2 prompts, click OK to either and let MBAM proceed with the disinfection process, if asked to restart the computer, please do so immediately.



NEXT


Go here to run an online scanner from ESET.
  • Turn off the real time scanner of any existing antivirus program while performing the online scan
  • Tick the box next to YES, I accept the Terms of Use.
  • Click Start
  • When asked, allow the activeX control to install
  • Click Start
  • Make sure that the option Remove found threats is unticked and the Scan Archives option is ticked.
  • Click on Advanced Settings, ensure the options Scan for potentially unwanted applications, Scan for potentially unsafe applications, and Enable Anti-Stealth Technology are ticked.
  • Click Scan
  • Wait for the scan to finish
  • When the scan completes, press the LIST OF THREATS FOUND button
  • Press EXPORT TO TEXT FILE , name the file ESETSCAN and save it to your desktop
  • Include the contents of this report in your next reply.
  • Press the BACK button.
  • Press Finish

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#5 cjfling

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Posted 03 May 2012 - 07:59 AM

Thanks again for your help. When I ran MBAM nothing was found and when I tried to run Eset, after accepting the user agreement and clicking start, both IE Windows strangely shutdown. Did it twice and it was like something closed the IE session. No error or anything like IE imploded. AVG still detects the infection on netbt.sys and I've attached the MBAM log.

Thanks

Attached Files



#6 cjfling

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Posted 03 May 2012 - 02:53 PM

Catbyte,

I have resolved the issues. AV scan shows all clear. Thanks for all your help.

#7 CatByte

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Posted 03 May 2012 - 04:46 PM

Hi

Just some housekeeping to do now,


Follow these steps to uninstall Combofix

  • Make sure your security programs are totally disabled.
  • Click START then RUN
  • Now copy/paste Combofix /uninstall into the runbox and click OK. Note the space between the ..X and the /U, it needs to be there.

Posted Image


If there are any logs/tools remaining on your desktop > right click and delete them.


NEXT


Below I have included a number of recommendations for how to protect your computer against malware infections.

  • It is good security practice to change your passwords to all your online accounts on a fairly regular basis, this is especially true after an infection. Refer to this Microsoft article
    Strong passwords: How to create and use them
    Then consider a password keeper, to keep all your passwords safe. KeePass is a small utility that allows you to manage all your passwords.

  • Keep Windows updated by regularly checking their website at :
    http://windowsupdate.microsoft.com/
    This will ensure your computer has always the latest security updates available installed on your computer.

  • Make Internet Explorer more secure
    • Click Start > Run
    • Type Inetcpl.cpl & click OK
    • Click on the Security tab
    • Click Reset all zones to default level
    • Make sure the Internet Zone is selected & Click Custom level
    • In the ActiveX section, set the first two options ("Download signed and unsigned ActiveX controls) to "Prompt", and ("Initialize and Script ActiveX controls not marked as safe") to "Disable".
    • Next Click OK, then Apply button and then OK to exit the Internet Properties page.

  • Download TFC to your desktop
    • Close any open windows.
    • Double click the TFC icon to run the program
    • TFC will close all open programs itself in order to run,
    • Click the Start button to begin the process.
    • Allow TFC to run uninterrupted.
    • The program should not take long to finish it's job
    • Once its finished it should automatically reboot your machine,
    • if it doesn't, manually reboot to ensure a complete clean
    It's normal after running TFC cleaner that the PC will be slower to boot the first time.

  • WOT, Web of Trust, warns you about risky websites that try to scam visitors, deliver malware or send spam. Protect your computer against online threats by using WOT as your front-line layer of protection when browsing or searching in unfamiliar territory. WOT's color-coded icons show you ratings for 21 million websites, helping you avoid the dangerous sites:
    • Green to go
    • Yellow for caution
    • Red to stop
    WOT has an addon available for both Firefox and IE

  • Keep a backup of your important files - Now, more than ever, it's especially important to protect your digital files and memories. This article is full of good information on alternatives for home backup solutions.

  • ERUNT (Emergency Recovery Utility NT) allows you to keep a complete backup of your registry and restore it when needed. The standard registry backup options that come with Windows back up most of the registry but not all of it. ERUNT however creates a complete backup set, including the Security hive and user related sections. ERUNT is easy to use and since it creates a full backup, there are no options or choices other than to select the location of the backup files. The backup set includes a small executable that will launch the registry restore if needed.

  • In light of your recent issue, I'm sure you'd like to avoid any future infections. Please take a look at this well written article:
    PC Safety and Security--What Do I Need?.


Thank you for your patience, and performing all of the procedures requested.

Please respond one last time so we can consider the thread resolved and close it, thank-you.

Microsoft MVP - 2010, 2011, 2012, 2013, 2014, 2015


#8 CatByte

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Posted 06 May 2012 - 09:44 PM

It appears that this issue is resolved, therefore I am closing the topic. If that is not the case and you need or wish to continue with this topic, please send me or any Moderator a Personal Message (PM) that you would like this topic re-opened.

Microsoft MVP - 2010, 2011, 2012, 2013, 2014, 2015





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