Netinfo Security ›› 2020, Vol. 20 ›› Issue (6): 90-95.doi: 10.3969/j.issn.1671-1122.2020.06.011

Previous Articles     Next Articles

Cyber Threat Intelligence Propagation Based on Conformal Prediction

ZHANG Yongsheng1, WANG Zhi2(), WU Yijie2, DU Zhenhua3   

  1. 1. East China Regional Air Traffic Management Bureau, CAAC, Shanghai 200335, China
    2. College of Cyber Science, Nankai University, Tianjin 300350, China
    3. National Computer Virus Emergency Response Center, Tianjin 300457, China
  • Received:2020-04-06 Online:2020-06-10 Published:2020-10-21
  • Contact: WANG Zhi E-mail:zwang@nankai.edu.cn

Abstract:

The ability to acquire and utilize unknown threat intelligence is the core competitiveness of the current cyberspace security. The threat intelligence has the characteristics of short-lived, fast mutation, large quantity and so on. Therefore, the detection method based on static threshold cannot fully utilize known threat intelligence. This paper proposes an approach of threat intelligence propagation method based on conformal prediction. By introducing the credibility and confidence from statistical learning, this approach could propagate unknown threat intelligence from known ones with selectable maximum error probability. The experimental results show that the average F1 score of DGA domain names detected by this approach is above 90%, meanwhile, the error rate of DGA domain name after propagation is under 2.5%.

Key words: threat intelligence, malicious domain, domain generation algorithm, conformal prediction

CLC Number: