Trojan-Dropper:W32/Agent is a very large family of programs, most of which drop, install and execute other programs (usually malware) to the victim's machine.
Variants in the Trojan-Dropper:W32/Agent family vary widely in their characteristics and payloads. For representative examples of variants in this family, please see the following descriptions:
Other "Agent" Families
Trojan-Dropper:W32/Agent is a subset of the "Agent" family, which groups together a wide variety of malware that do not fit into any other known families. The Agent family includes trojans, worms, viruses, backdoors and other types of malicious programs.
For representative examples of these other subsets, you can also see: