There are a few resources that come to mind.
- A quick search on the word malware on SearchSecurity.com will pull up a lot of good articles.
- Check out chapter 2 of my free e-book The Definitive Guide to Email Management and Security. I cover malware in depth in that chapter.
- There's also a great book called Malware: Fighting Malicious Code by Ed Skoudis and Lenny Zeltser you should check out, as well.
This was first published in August 2004