: ntndis.sys is a Trojan/rootkit component. Backdoor/IRCBot Trojans
are very dangerous
because they provide a means of accessing a computer system that bypasses security mechanisms. Remote attackers use backdoor Trojans 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 or has credit card information on it, all passwords should be changed immediately
to include those used for 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 breech.
Although the backdoor Trojan 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 backdoor Trojan has been removed the computer is now secure. Many experts in the security community believe that once infected with this type of Trojan, the best course of action is to reformat and reinstall the OS - "When should I re-format?
For XP users, the easiest thing is to do a System Restore
and choose a restore point with a creation date before the date of infection. In your case it would be easier to use System Restore from a command prompt
in Safe Mode.
However, should you decide not to follow that advice, you can try this but we cannot guarantee your PC to be trustworthy.
If you cannot access the Internet, please download SDFix
by AndyManchesta and save it to a usb stick.
Transfer it to the infected computer. If all you can use is Task Manager, then you can still work with that. Open Task Manager, select "New Task
" at the bottom of the Applications Tab, browse to C:\WINDOWS\explorer.exe, double-click on explorer.exe and then press "OK
" to launch Windows Explorer.
Move SDFix from your usb stick to your desktop.
Note: If this error message is displayed when running SDFix:
- 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.
- While still 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 into the SDFix folder as Report.txt.
The command prompt has been disabled by your administrator.
Press any key to continue...
Please go to Start Menu > Run > and type (copy/paste) the following line:
%systemdrive%\SDFix\apps\swreg IMPORT %systemdrive%\SDFix\apps\Enable_Command_Prompt.reg
Press OK and then run SDFix again.