Troj/Startpa-Z is a simple Trojan that makes changes to Internet Explorer settings via the registry.
Troj/Startpa-Z changes the default start page of Internet Explorer to the URL http://aifind.info/ and will add a list of URLs containg adult content to the favourites folder. The Trojan will also change the following registry entries:
HKCU\Software\Microsoft\Internet Explorer\Styles\
Use My Stylesheet = 1
HKCU\Software\Microsoft\Internet Explorer\Styles\
User Stylesheet = <Windows>\hh.htt
HKLM\Software\Microsoft\Internet Explorer\Styles\
Use My Stylesheet = 1
HKLM\Software\Microsoft\Internet Explorer\Styles\
User Stylesheet = <Windows>\hh.htt
The stylesheet file hh.htt is detected by Sophos Anti-Virus as Troj/Startpa-BG.