I found this over at [url=http://computerschool.org/computers/malware/:vczv8ihv]computerschool.org[/url:vczv8ihv] and it does an excellent job of explaining the "what" and "why" of malware. We at DCT often try to explain it in simple terms, but this picture just lets you follow the flow of money. Now you know why it is important to practice safe computing!
[img:vczv8ihv]http://www.computerschool.org/images/malware.png[/img:vczv8ihv]