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Virus/Trojan - outsmarting AV and wreaking havoc.

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2 replies to this topic

#1 dacloutier


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Posted 07 January 2011 - 09:46 AM

Windows XP Professional SP 2 computer recently corrupted with a naughty bug which causes Google redirects, and multiple iexplore.exe processes. Changed the desktop wallpaper, which has been corrected after multiple scan attempts, but the IE connections and Google redirects persist. Prevents FireFox from running (uninstall/reinstall does not fix), and firefox.exe errors pop-up in windows dialogs even thought it has been uninstalled. Google Chrome works. IE will launch, but I'm afraid to surf.

This started with a fake security suite which AdAware and Malwarebytes were able to identify and remove parts. However, after the "cleanning" a Java 6 window opened and the fun really started.
The hosts file is clean, DHCP remains correct (auto), DNS is correct, and IE explorer does not show that a false proxy has not been set (no proxy is required for my network).

Things I have tried: (newest versions downloaded and updated just prior to use)
AdAware originally would run, and found a trojan (backdoor.TdServ) in sst90.sys and sst90.tmp. AdAware found nothing in the last 2 scans. But AAW will no longer function. I think the redirects allowed for the download of more nasties.
Hitman Pro 3.5 (build 118) is prevented from connecting to the internet to run (set to "no proxy").
Kaspersky online scan is prevented from functioning since it interrupts the internet connection.
Symantec Antivirus corporate that is up to date, but finds nothing.
Partizan from Greatis rootkit does not detect anything.
UnHackMe doesn't find anything.
Malwarebytes worked up until this infection, and will no longer complete its scan without encountering and error which forces it to close.
Emsisoft will install but will not run.

I don't see any random process names in the running process list. Upon restart, the Windows Task Manager shows 7 instances of svchost.exe, and I immediately gets windows error windows stating "Internet Exlporer has encountered a problem and needs to close" when the IE hasn't been started. (Perhaps iexplore.exe is needs for windows search, indexing and Groove?)

BTW, ComboFix had been used on this machine in August to successfully clean a rootkit bug.

I have followed the Preparation Guide on http://www.bleepingcomputer.com/forums/topic34773.html, started DeFogger, and ran DDS (logs attached).

GMER will not run to completion, but instead hangs after ~20 mins and requires a manual reboot.

I look forward to any insight and assistance your expertise may provide. I'm stuck! Thanks in advance.

Attached Files

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#2 Casey_boy


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Posted 12 January 2011 - 03:10 PM

Hello and welcome to Bleeping Computer

We apologize for the delay in responding to your request for help. Here at Bleeping Computer we get overwhelmed at times, and we are trying our best to keep up. Please note that your topic was not intentionally overlooked. Our mission is to help everyone in need, but sometimes it takes just a little longer to get to every request for help. No one is ignored here.

If you have since resolved the original problem you were having, we would appreciate you letting us know. If not please perform the following steps below so we can have a look at the current condition of your machine.

If you have not done so, include a clear description of the problems you're having, along with any steps you may have performed so far.

Upon completing the steps below another staff member will review your topic an do their best to resolve your issues.

If you have already posted a DDS log, please do so again, as your situation may have changed.
Use the 'Add Reply' and add the new log to this thread.

Thanks and again sorry for the delay.

We need to see some information about what is happening in your machine. Please perform the following scan:
  • Download DDS by sUBs from one of the following links. Save it to your desktop.
  • Double click on the DDS icon, allow it to run.
  • A small box will open, with an explaination about the tool. No input is needed, the scan is running.
  • Notepad will open with the results.
  • Follow the instructions that pop up for posting the results.
  • Close the program window, and delete the program from your desktop.
Please note: You may have to disable any script protection running if the scan fails to run. After downloading the tool, disconnect from the internet and disable all antivirus protection. Run the scan, enable your A/V and reconnect to the internet.

Information on A/V control HERE

We also need a new log from the GMER anti-rootkit scanner. Please first disable any CD emulation programs using the steps found in this topic:

Why we request you disable CD Emulation when receiving Malware Removal Advice

Then create another GMER log and post it as an attachment to the reply where you post your new DDS log. Instructions on how to properly create a GMER log can be found here:

How to create a GMER log


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 thcbytes


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Posted 18 January 2011 - 01:15 PM

Due to the lack of feedback, this topic is now closed.In the event you still have problems, please send me or any Moderator a Private Message and ask them to reopen this topic within the next 5 days.
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