3D-RORI is an automated tool for the selection of security countermeasures against cyber attacks. It combines a cost sensitive metric (Return On Response Investment or RORI for short) and a 3D geometrical model. As a result, the tool may guide operators to evaluate, rank and select security countermeasures against complex cyber attacks, as well as simulating the impact of such attacks and the selected countermeasures on a given system. See here for further details about 3D-RORI.