Digitalization brings about the development of online scenarios and also causes a new round of growth in the black market, which further widens the information gap between attack and defense, and makes the defender in an unfavorable position. How to timely grasp the attacker's strategy has become the first line of security guarantee. According to the World Economic Forum's Global Risks Report 2020, cybercrime will be the second most concerned risk in global business over the next decade (to 2030). By 2021, Internet black market will cause a global loss of up to 6 trillion US dollars.