摘要

Nowadays, the threats industrial control systems face from the inside and outside are becoming more and more serious. However, there are very few works describing industrial control system network attacks, which in turn make it very essential for industrial control system network attack researches to describe and model such attacks. This paper proposes an approach to describe the procedure of industrial control system network attacks using the object Petri net, and takes a case study of smart substation attack as example to help introduce this method of description and modeling. This method adopts a hierarchical form of Petri net to describe the entire process of a network attack, which can control the scale of the Petri net model effectively and can describe the attack process in more detail and accurately at the same time.