Attending the rehearsal, there were more than 80 officials and information technology experts of the Department of Information Technology and Customs Statistics, representatives of the local Customs Departments.

Implementing the security of information under the four-layer model, the 2020 exercise for Customs officials and experts choosing two scenarios. One is the drill to respond to incidents that attack the customs information technology application system through malicious sources via email and USB. The second is the incident response drills Portal of the General Department of Customs (www.customs.gov.vn) attacked to modify the content.

Experts participating in the drill are trained in skills, then rehearsed under a secret scenario for a day. Details of rehearsal scripts are designed by VNIST and NCSC to closely follow practical contents that hackers often take advantage of, simulating 100% similar to the technical systems operating at the General Department of Customs. Experts attending the drill experience the most accurate risks and information security threats that may occur.

Mr. Ngo Huy Hoang, director of VNIST Joint Stock Company, said that experts simulated the exploit to gaps "Telerik UI" flaw, a type of attack conducted by the Ministry of Public Security and specialized agencies of the Ministry of Information and Communications alert hackers are taking advantage of attacks on the State Agency Web Portal in early June to update, apply immediately to the content of training and drills Customs 2020.

The results show that rehearsals are of high practical significance, should be conducted regularly, updated with many different attack techniques, expanding the scope of personnel involved to raise awareness, enhance skills for all staffs in the agency, not just the information security staffs.