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Threat detected


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8 replies to this topic

#1 japanjohny

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Posted 10 July 2010 - 08:47 PM

Hello and thanks for this wonderul service. I got a Resident Shield Alert from AVG saying I have been infected with Win32/Patched.DX. The file name is C:\WINDOWS\system32\drivers\netbt.sys. It's noted as white-listed and a critical file. I am running Windows Home XP SP2. I would appreciate any help you can send my way.

Thank you

Edited by japanjohny, 11 July 2010 - 03:27 AM.


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#2 Casey_boy

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Posted 12 July 2010 - 04:23 PM

Hi,

Yes netbt.sys is a legitimate file. However, it may be that malicious software has modified the file and it is now infected or patched. You should update and then run a full scan with AVG. You may also wish to try other anti-malware products such as MBAM.

Please download Malwarebytes Anti-Malware and save it to your desktop.Download Link 1
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.
    For instructions with screenshots, please refer to the How to use Malwarebytes' Anti-Malware Guide.
  • 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.

Casey

If I have been helping you and I do not reply within 48hours, feel free to send me a PM.


* My Website * Am I Infected? * Malware Removal Help * If you'd like to say thanks *


#3 japanjohny

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Posted 12 July 2010 - 06:46 PM

Casey,

Thanks for the help. I updated AVG and ran it first, then mbam. The results of the quick scan follow:

Malwarebytes' Anti-Malware 1.46
www.malwarebytes.org

Database version: 4306

Windows 5.1.2600 Service Pack 2
Internet Explorer 8.0.6001.18702

7/13/2010 7:23:14 AM
mbam-log-2010-07-13 (07-23-14).txt

Scan type: Quick scan
Objects scanned: 135641
Time elapsed: 8 minute(s), 52 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)

The warning stopped popping up before I did any of this. In any case, I feel better knowing there isn't any malware in my system.

Thank you for your time and advice!

#4 Casey_boy

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Posted 13 July 2010 - 04:07 AM

As you can see the MBAM log is clean. The only thing I might recommend is that you restore a known clean version of the netbt.sys file from (if you have one) your Windows installation CD.

Instructions here.

Also, I see you're running Windows XP SP2. You should look at upgrading to Service Pack 3 as soon as possible. Microsoft are stopping ALL updates to SP2 - the only way to keep your system safe is to update to SP3.

http://www.bleepingcomputer.com/forums/t/326281/why-are-people-still-using-xp-service-pack2/

http://support.microsoft.com/kb/322389

Casey

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* My Website * Am I Infected? * Malware Removal Help * If you'd like to say thanks *


#5 japanjohny

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Posted 13 July 2010 - 06:42 AM

Thanks and thanks for the heads up on SP3. Saw that when I first logged on but wanted to make sure the other problem went away. I didn't even know there was an SP3 pack let alone that SP2 updates were gone. I'll do that upgrade right now and thanks Casey. You and your people are great! You all keep it simple and to the point.

#6 japanjohny

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Posted 28 July 2010 - 10:59 PM

I did all of these things and everything seemed fine. Then a couple of days ago the message came back. I updated both AVG and Malwarebytes and scans revealed nothing until today. I updated again and ran full system scans and got this from AVG:
C:\WINDOWS\system32\drivers\atapi.sys virus identified Win 32 patched DX
C:\WINDOWS\system32\drivers\netbt.sys virus identified Win 32 patched DX

This is the log of my Malware scan:

Malwarebytes' Anti-Malware 1.46
www.malwarebytes.org

Database version: 4364

Windows 5.1.2600 Service Pack 3
Internet Explorer 8.0.6001.18702

7/29/2010 12:48:12 PM
mbam-log-2010-07-29 (12-48-12).txt

Scan type: Full scan (C:\|D:\|E:\|G:\|)
Objects scanned: 216520
Time elapsed: 46 minute(s), 48 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: 2

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)

I haven't used the remove files command yet. What should I do?

I will start a second thread as well. Thanks for aany help you ar anyone can send my way.

#7 Casey_boy

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Posted 30 July 2010 - 04:09 PM

Hi,

Sorry for the delay in my response.

With the information you have provided I believe you will need help from the malware removal team. I would like you to start a new thread HERE and include a link to this thread. Please make sure that you read the information about getting started before you start your thread.

It would be helpful if you post a note here once you have completed the steps in the guide and have started your topic in malware removal. Good luck and be patient. Help is on the way!

Casey

If I have been helping you and I do not reply within 48hours, feel free to send me a PM.


* My Website * Am I Infected? * Malware Removal Help * If you'd like to say thanks *


#8 japanjohny

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Posted 31 July 2010 - 07:23 AM

Casey,

Thanks for the easy to follow instructions and help. I read through the guide and followed it as best I could. You people do really make it fool-proof. Since we are on opposite time schedules I will be slow to respond to your advice but please don't think I'm not being serious about solving the problem. As a Yank living in Japan I am at GMT +9, and with you being in the UK there is a time issue. Please don't feel any need to apologize for delays. They are inevitable given the circumstances and I am truly grateful to you and your cohorts. As always thank you.

Edited by japanjohny, 31 July 2010 - 07:24 AM.


#9 Orange Blossom

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Posted 31 July 2010 - 11:03 PM

Hello,

Now that you have posted a log here: http://www.bleepingcomputer.com/forums/t/336117/infected-with-win-32-patched-dx-in-netbtsys-and-atapisys/ 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 MRT 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 MRT 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 MRT 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 MRT 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 MRT Team member is already assisting you and not open the thread to respond.

Please be patient. It may take several days to get a response but your log will be reviewed and answered as soon as possible. I advise checking your topic once a day for responses as the e-mail notification system is unreliable.

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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