Type
Trojan
Troj/Bizten-B will hijack Internet Explorer settings changing its default start and search page to a particular site by setting the following registry keys:
HKCU\Software\Microsoft\Internet Explorer\Main\Use Search Asst
HKCU\Software\Microsoft\Internet Explorer\Main\Search Bar
HKCU\Software\Microsoft\Internet Explorer\Main\Search Page
HKCU\Software\Microsoft\Internet Explorer\Main\Start Page
HKCU\Software\Microsoft\Internet Explorer\SearchUrl
HKCU\Software\Microsoft\Internet Explorer\SearchUrl\provider
HKLM\Software\Microsoft\Internet Explorer\Search\SearchAssistant
More: http://www.sophos.com/virusinfo/analyses/trojbiztenb.html

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