Design Of Penetration Platform Based On Siemens S7-300

With the continuous development of science and productivity,in the process of continuous transformation and upgrading from traditional industry to modern industry,the introduction of information technology gives a strong boost to this process,and makes industrialization and information closely linked.Based on incomplete statistics,it can be known that industrial control system is not only getting more extensive multi-directional application in many fields such as electricity and oil,but also getting more extensive practical application in diversified core fields,mainly in aerospace.More than 80%of the infrastructure needs to rely on the role of industrial control system to achieve good automation effect,because of this,industrial control system must have excellent security performance.Since the occurren ce of dam overflow in the United States in 2005,the incidents threatening the safety of industrial control system have been increasing year by year.The industrial control system security incident investigation report 2014,according to energy safety accident happened even as high as 32%,because energy existing industrial control system,no matter in terms of information,or for automation were extremely significant,attacks on the control system of the energy industry will bring enormous economic loss,even endanger state security.At present,the research on industrial control system penetration platform is relatively scarce in China,so it is necessary to carry out relevant research.The paper simplifies the industrial control system network which has been put into use and retains its basic components,and designs the penetration platform of virtual industrial control system based on Siemens S7-300.Based on this platform,the article takes the "active defense" measure.We use the Snap7 tool to break through the security defense of the platform from the point of view of the attacker.We modify the data and program of PLC successfully.After which we realize the Replay Attack and show the attack effect.By this mean,we can find security risks and verify the vulnerability of the industrial control system.The text mainly completes the following two parts:1.The design and implementation of the virtual industrial control closed-loop system penetration platform structures based on PLC sim and Matlab.Chose the four capacity tank as the controlled object and connect engineering station,operator station,virtual PLC,virtual controlled object through Ethernet and OPC communication.Control the level of tanks to the specified position through the LQG control.2.Realize the X 2detector to detect the abnormality caused by the inside and outside of the industrial control system in time.Using Snap7 to modify the code and the data of Siemens S7-300 and attack the virtual closed-loop control system by replay attacks,resulting in the failure of the detection of the X 2detector on replay attacks.