I wanted to give a rough overview how a Trojan horse is organised in itself and visualise its structure a little. It took me some time and after some hours of work the result is the diagram below. It shows a Trojans install and start routines and the three main modules with its functions.

You can see how the modules depend on each other and how the network communication takes place.

In the case you have questions, criticism or opinions please drop a mail or leave a comment below.