Troj/Istbar-DJ is an adware downloader.
Troj/Istbar-DJ attempts to download and install adware executables without notifying the user. Names of files downloaded include:
istsvc.exe
lycos_ss.exe
keywordsinc.exe
ClrSchP010.exe
whenu.exe
powerscan.exe
sbinstall.exe
The Trojan sets the following registry entries:
HKLM\Software\Microsoft\Windows\CurrentVersion\Run\Power Scan
HKCU\Software\Microsoft\Internet Explorer\Main\BandRest = "Never"
HKLM\SOFTWARE\Microsoft\Internet Explorer\Main\BandRest = "Never"
The downloaded applications may make further changes to system settings.