Abnormally Malicious Autonomous Systems and Their Internet Connectivity

11 years 7 months ago

Download www.cs.indiana.edu

—While many attacks are distributed across botnets, investigators and network operators have recently identiﬁed malicious networks through high proﬁle autonomous system (AS) de-peerings and network shut-downs. In this paper, we explore whether some ASes indeed are safe havens for malicious activity. We look for ISPs and ASes that exhibit disproportionately high malicious behavior using ten popular blacklists, plus local spam data, and extensive DNS resolutions based on the contents of the blacklists. We ﬁnd that some ASes have over 80% of their routable IP address space blacklisted. Yet others account for large fractions of blacklisted IP addresses. Several ASes regularly peer with ASes associated with signiﬁcant malicious activity. We also ﬁnd that malicious ASes as a whole differ from benign ones in other properties not obviously related to their malicious activities, such as more frequent connectivity changes with their BGP peers. Overall, we conclude that examining mali...

Craig A. Shue, Andrew J. Kalafut, Minaxi Gupta

Real-time Traffic