As most of you might know, the source of Zeus has been leaked recently.
I think it's a great resource for studying and therefore here is a link:

http://www.megaupload.com/?d=HR9PX9KC

pass: zeus

I found it here:

http://www.thehackernews.com/2011/05/finally-source-code-of-zeus-crimeware.html

Regards
darkelf

...was about time! the source was initially leaked, but with a RAR password to bruteforce

thanks, it will be a very interesting read