Trojan downloaders downloads and installs new malware or adware on the computer.

The downloaded files contents backdoors, bots, Trojan horses, etc.

Initially Agent.TPF arrives as an attachment in spam mail with subject:

Hot News
Hot Pictures
Something Hot


It uses the name "Card.zip", which contains a copy of malware with name "card.scr".

The files recognized as a Trojan-Downloader.Win32.Agent.tpf has the same characteristics as Trojan-Dropper.Win32.Agent.rek.