What is Google Search Results Redirection Virus?
Type: Virus | Category: Trojans and viruses | Discovered: 11 June 2009
It is a kind of virus that denies access to particular web sites and redirects the visitor to a different target pages instead of the ones displayed in search engine results. These kinds of viruses are also known as Browser Hijackers, which are the causers of webpage redirection and in specific case as follows - search engine results redirection (in this topic - Google search results redirection). Usually redirected websites are advertisement (spam) pages or even bogus search engine websites. After researching the virus we are quite sure that it is affecting almost every known browser.
Along with Google result redirection user might be getting Sytem Alert warnings about multiple Trojan/Viruses on his computer. These kinds of Security Alerts should not be trusted as they are the cause of a rogue anti-spyware programs presence on the computer. Also, shortcuts to porn related websites might be placed on the desktop, which will be reappearing after being deleted.
Fake System Alert:

Google Redirect Virus symptoms: search engine results redirection, fake System Alert activity, rogue computer security program advertising, new icons on desktop, slow computer performance.
Browsers that can be affected by Google Search Results Redirection Virus: Mozilla Firefox, Internet Explorer, Opera, Google Chrome.
Along with Google result redirection user might be getting Sytem Alert warnings about multiple Trojan/Viruses on his computer. These kinds of Security Alerts should not be trusted as they are the cause of a rogue anti-spyware programs presence on the computer. Also, shortcuts to porn related websites might be placed on the desktop, which will be reappearing after being deleted.
Fake System Alert:

Google Redirect Virus symptoms: search engine results redirection, fake System Alert activity, rogue computer security program advertising, new icons on desktop, slow computer performance.
Browsers that can be affected by Google Search Results Redirection Virus: Mozilla Firefox, Internet Explorer, Opera, Google Chrome.
Google Search Results Redirection Virus removal tool:
- Spyware Doctor (see here for the installation guide)
Google Search Results Redirection Virus Entries:
The following dll files are created: C:\Windows\System32\wdmaud.sys
The following files are created:
dmgsh.exe
Hijackthis Entries:
O4 - HKLM\..\Run: [dmgsh.exe] C:\WINDOWS\system32\dmgsh.exe