Image Viruses

[nickkname]

Imageboards such as 4chan are the most popular websites, and imageboards are known for their images - but PNG files can contain viruses.
http://www.pcworld.com/article/243721/attackers_get_sneakier_with_encrypted_malware.html

Does Spybot search for these viruses?
Should Spybot include these viruses in its database?