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Cannot access the internet after Vundo removal


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#1 wildfan

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Posted 10 January 2010 - 05:18 PM

After removing the Vundo trojan from my laptop, I am not able to access the internet. When I go to Internet Explorer, a screen with "The page cannot be displayed" comes up. I have scanned my laptop with MalwareBytes and the report comes back clean. I ran a Hijacker scan and found the following: Broken internet access because of LSP provider 'C:\windows\system32\winhelper86.dll' missing. I'm not sure what to do now.

Edited by wildfan, 10 January 2010 - 05:20 PM.


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#2 quietman7

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Posted 11 January 2010 - 09:10 AM

winhelper86.dll was related to your infection.

Generally, most Internet connectivity problems arise out of corrupt Winsock settings due to the installation of a networking software or Malware infestation. Broken Internet access can be caused by various types of Layered Service Provider (LSP) software installed on a system. LSPs are designed to integrate directly into the computer's TCP/IP layer - the protocol used to communicate on the Internet. LSPs are installed in such a way that each LSP in the TCP/IP handler are chained together. However, due to Winsock Hijackers, bugs in some LSPs, deletion of the software or incorrect removal, this chain can become broken resulting in loss of ability to connect to the Internet.

XP users can download and run LSPFix which should/may restore Internet connectivity.
Be sure to print out and follow the instructions provided in the Using LSP-Fix Tutorial.

Vista users can refer to:Note: The netsh winsock reset command resets the Winsock catalog to the default configuration (clean state) and removes all LSPs (Layered Service Providers) previously installed. It is useful if a malformed LSP is installed that results in loss of network packets transmission failure leading to loss of network connectivity. Any previously-installed LSPs will need to be re-installed. Instead of the using the above netsh winsock command, another option for resetting TCP/IP in XP or Vista, is to use Microsoft's Automatic Fix. Click the Fix this problem link. Then click Run in the File Download dialog box, and follow the steps in this wizard. You can save the automatic fix to a USB flash drive or CD, transfer it to the affected computer and then run it.
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#3 wildfan

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Posted 11 January 2010 - 07:24 PM

LSP-Fix worked. Thank you very much for your help!

#4 quietman7

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Posted 12 January 2010 - 07:44 AM

You're welcome.

If there are no more problems or signs of infection, you should Create a New Restore Point to prevent possible reinfection from an old one. Some of the malware you picked up could have been backed up, renamed and saved in System Restore. Since this is a protected directory your tools cannot access to delete these files, they sometimes can reinfect your system if you accidentally use an old restore point. Setting a new restore point AFTER cleaning your system will help prevent this and enable your computer to "roll-back" to a clean working state.

The easiest and safest way to do this is:
  • Go to Start > Programs > Accessories > System Tools and click "System Restore".
  • Choose the radio button marked "Create a Restore Point" on the first screen then click "Next". Give the R.P. a name, then click "Create". The new point will be stamped with the current date and time. Keep a log of this so you can find it easily should you need to use System Restore.
  • Then use Disk Cleanup to remove all but the most recently created Restore Point.
  • Go to Posted Image > Run... and type: Cleanmgr
  • Click "Ok". Disk Cleanup will scan your files for several minutes, then open.
  • Click the "More Options" tab, then click the "Clean up" button under System Restore.
  • Click Ok. You will be prompted with "Are you sure you want to delete all but the most recent restore point?"
  • Click Yes, then click Ok.
  • Click Yes again when prompted with "Are you sure you want to perform these actions?"
  • Disk Cleanup will remove the files and close automatically.
Vista and Windows 7 users can refer to these links: Create a New Restore Point in Vista or Windows 7 and Disk Cleanup in Vista.
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#5 wildfan

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Posted 13 January 2010 - 09:51 AM

I've created the new restore point. Thank you again for all your help!

#6 quietman7

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Posted 13 January 2010 - 10:57 AM

You're welcome.

Tips to protect yourself against malware and reduce the potential for re-infection:

Keep Windows and Internet Explorer current with all critical updates from Microsoft which will patch many of the security holes through which attackers can gain access to your computer. If you're not sure how to do this, see Microsoft Update helps keep your computer current.

Avoid gaming sites, porn sites, pirated software, cracking tools, keygens, and peer-to-peer (P2P) file sharing programs (i.e. Limewire, eMule, uTorrent). They are a security risk which can make your computer susceptible to a smörgåsbord of malware infections, remote attacks, exposure of personal information, and identity theft. Malicious worms, backdoor Trojans IRCBots, and rootkits spread across P2P file sharing networks, gaming, porn and underground sites. Users visiting such pages may see innocuous-looking banner ads containing code which can trigger pop-up ads and malicious Flash ads that install viruses, Trojans, and spyware. Ads are a target for hackers because they offer a stealthy way to distribute malware to a wide range of Internet users. Porn sites can lead to the Trojan.Mebroot MBR rootkit and other dangerous malware. The best way to reduce the risk of infection is to avoid these types of web sites and not use any P2P applications.Beware of Rogue Security software as they are one of the most common sources of malware infection. They infect machines by using social engineering and scams to trick a user into spending money to buy a an application which claims to remove malware. For more specific information on how these types of rogue programs and infections install themselves, read:Keeping Autorun enabled on USB (pen, thumb, jump) and other removable drives has become a significant security risk as they are one of the most common infection vectors for malware which can transfer the infection to your computer. To learn more about this risk, please read:Many security experts recommend you disable Autorun asap as a method of prevention. Microsoft recommends doing the same.

...Disabling Autorun functionality can help protect customers from attack vectors that involve the execution of arbitrary code by Autorun when inserting a CD-ROM device, USB device, network shares, or other media containing a file system with an Autorun.inf file...

Microsoft Security Advisory (967940): Update for Windows Autorun
How to Maximize the Malware Protection of Your Removable Drives

Other related reading sources:• Finally, if you need to replace your anti-virus, firewall or need a reliable anti-malware scanner please refer to:
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