A list of port numbers used by trojans, malware, viruses

 The link below lists known trojan-malware-virus port numbers:

http://www.governmentsecurity.org/articles/trojan-malware-virus-and-application-ports-list.html

The iana assigned registered service-names-port-numbers can be accessed by clicking on link below. NOTE:
List is long, takes time to load!

http://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xml