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How To Remove Xpdx.sys From My Pc


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4 replies to this topic

#1 bigjohn500

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Posted 06 December 2007 - 08:02 PM

I have used microsoft malicious software removal and scanned my computor. I am having problems with my system shutting down on its own. The scan gives me severe risk c:windows/system32/xpdx.sys, But after many attemtps it cannot remove this file. I tried manually to remove it but it will not allow me do it. Is there any spyware programs that wil remove this.
Thanks in advance.

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#2 CTH_Tom

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Posted 06 December 2007 - 08:05 PM

Yea you got a baddie-
http://www.bleepingcomputer.com/startups/xpdx.sys-18517.html
I would post a HJT log in the HiJackThis logs and malware removal forum.
X

#3 quietman7

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Posted 07 December 2007 - 11:13 AM

The identified file is related to a rootkit componet. Rootkits are very dangerous because they use advanced techniques as a means of accessing a computer system that bypasses security mechanisms and steal sensitive information which they send back to the hacker. Many rootkits can hook into the Windows 32-bit kernel, and patch several APIs to hide new registry keys and files they install. Remote attackers use them as part of an exploit to to gain unauthorized access to a computer and take control of it without your knowledge.

If your computer was used for online banking, has credit card information or other sensitive data on it, you should immediately disconnect from the Internet until your system is cleaned. All passwords should be changed immediately to include those used for banking, email, eBay and forums. You should consider them to be compromised. They should be changed by using a different computer and not the infected one. If not, an attacker may get the new passwords and transaction information. Banking and credit card institutions should be notified of the possible security breach.

Although the rootkit has been identified and may be removed, your PC has likely been compromised and there is no way to be sure the computer can ever be trusted again. It is dangerous and incorrect to assume that because the rootkit has been removed the computer is now secure. Many experts in the security community believe that once infected with this type of malware, the best course of action is to reformat and reinstall the OS - "When should I re-format?".

Should you decide not to follow that advice, we will do our best to help clean the computer of any infections but we cannot guarantee it to be trustworthy or that the removal will be successful.

Please download SDFix by AndyManchesta and save it to your desktop.
alternate download
When using this tool, you must use the Administrator's account or an account with "Administrative rights"
  • Double click SDFix.exe and it will extract the files to %systemdrive%
  • (this is the drive that contains the Windows Directory, typically C:\SDFix).
  • DO NOT use it just yet.
Reboot your computer in "Safe Mode" using the F8 method. To do this, restart your computer and after hearing your computer beep once during startup (but before the Windows icon appears) press the F8 key repeatedly. A menu will appear with several options. Use the arrow keys to navigate and select the option to run Windows in "Safe Mode".

Open the SDFix folder and double click RunThis.bat to start the script.
  • Type Y to begin the cleanup process.
  • It will remove any Trojan Services or Registry Entries found then prompt you to press any key to Reboot.
  • Press any Key and it will restart the PC.
  • When the PC restarts, the Fixtool will run again and complete the removal process then display Finished, press any key to end the script and load your desktop icons.
  • Once the desktop icons load, the SDFix report will open on screen and also save a copy into the SDFix folder as Report.txt.
  • Copy and paste the contents of Report.txt in your next reply.
-- If this error message is displayed when running SDFix: "The command prompt has been disabled by your administrator. Press any key to continue..."
Please go to Start Menu > Run > and copy/paste the following line:
%systemdrive%\SDFix\apps\swreg IMPORT %systemdrive%\SDFix\apps\Enable_Command_Prompt.reg
Press Ok and then run SDFix again.

-- If the Command Prompt window flashes on then off again on XP or Win 2000, please go to Start Menu > Run > and copy/paste the following line:
%systemdrive%\SDFix\apps\FixPath.exe /Q
Reboot and then run SDFix again.

-- If SDFix still does not run, check the %comspec% variable. Right-click My Computer > click Properties > Advanced > Environment Variables and check that the ComSpec variable points to cmd.exe.
%SystemRoot%\system32\cmd.exe

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#4 bigjohn500

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Posted 15 December 2007 - 06:33 PM

The identified file is related to a rootkit componet. Rootkits are very dangerous because they use advanced techniques as a means of accessing a computer system that bypasses security mechanisms and steal sensitive information which they send back to the hacker. Many rootkits can hook into the Windows 32-bit kernel, and patch several APIs to hide new registry keys and files they install. Remote attackers use them as part of an exploit to to gain unauthorized access to a computer and take control of it without your knowledge.

If your computer was used for online banking, has credit card information or other sensitive data on it, you should immediately disconnect from the Internet until your system is cleaned. All passwords should be changed immediately to include those used for banking, email, eBay and forums. You should consider them to be compromised. They should be changed by using a different computer and not the infected one. If not, an attacker may get the new passwords and transaction information. Banking and credit card institutions should be notified of the possible security breach.

Although the rootkit has been identified and may be removed, your PC has likely been compromised and there is no way to be sure the computer can ever be trusted again. It is dangerous and incorrect to assume that because the rootkit has been removed the computer is now secure. Many experts in the security community believe that once infected with this type of malware, the best course of action is to reformat and reinstall the OS - "When should I re-format?".

Thanks for the advice , I think I will reformat.

#5 quietman7

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Posted 15 December 2007 - 11:35 PM

That's the decision I would have made if this were my system.

In case you need help with this, please review the following links:
"How to partition and format a hard disk in Windows XP"
"How to reformat and reinstall Windows XP - Method #1"
"How to reformat and reinstall Windows XP - Method #2"

These links include step by step instructions:
"Clean Install Windows XP".
"XP Clean Install Interactive Setup".

Reformatting a hard disk deletes all data. Before doing anything, you should back up all your critical files. This means not only all your data files, but also those applications and software setup programs you may have saved to your hard drive. You should also include updated driver software, applications patches, service packs, bug fixes and any other enhancements that may have downloaded and saved.

If you need additional assistance, you can start a new topic in the Windows XP Home and Professional forum.
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