about.dcu definition, relationships, removal:

This is a part of a malicious parasite that violates user privacy and damages the compromised system. The about.dcu file can be used for different purposes depending on the related parasite's type, functionality and carried payload. Although about.dcu may not take any malicious actions by itself, it ensures that a parasite is working properly and therefore needs to be removed. DO NOT open, execute or edit about.dcu!
The about.dcu file is installed and used by Dark Connection Inside. It is also related to other parasites such as GirlFriend and Kid Terror 1.0. These threats can use about.dcu for different purposes, as the file's functionality depends on a particular parasite it belongs to.
In some cases a presence of about.dcu does not mean that your system is infected. The file may actually belong to some fully legitimate applications and therefore must stay intact. If you are in doubt, please scan the about.dcu file using you regular spyware remover or antivirus program.