W32/Hantaner-A is a worm and virus which prepends itself to files found in the download folders of KaZaA and Internet Explorer. By infecting files in the KaZaA download folder W32/Hantaner-A may spread through peer-to-peer file sharing networks.
The location of the folders are obtained by querying the following registry entries:
HKCU\Software\Kazaa\Transfer\DownloadDir
HKCU\Software\Microsoft\Internet Explorer\Download Directory