Abstract
We describe an Internet-based collaborative environment that protects geographically dispersed organizations of a critical infrastructure (e.g., financial institutions, telco providers) from coordinated cyber attacks. A specific instance of a collaborative environment for detecting malicious inter-domain port scans is introduced. This instance uses the open source Complex Event Processing (CEP) engine ESPER to correlate massive amounts of network traffic data exhibiting the evidence of those scans. The paper presents two inter-domain SYN port scan detection algorithms we designed, implemented in ESPER, and deployed on the collaborative environment; namely, Rank-based SYN (R-SYN) and Line Fitting. The paper shows the usefulness of the collaboration in terms of detection accuracy. Finally, it shows how Line Fitting can both achieve a higher detection accuracy with a smaller number of participants than R-SYN, and exhibit better detection latencies than R-SYN in the presence of low link bandwidths (i.e., less than 3Mbit/s) connecting the organizations to Esper.
This research is partially funded by the EU project CoMiFin (Communication Middleware for Financial Critical Infrastructures [10]).
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Aniello, L., Di Luna, G.A., Lodi, G., Baldoni, R. (2011). A Collaborative Event Processing System for Protection of Critical Infrastructures from Cyber Attacks. In: Flammini, F., Bologna, S., Vittorini, V. (eds) Computer Safety, Reliability, and Security. SAFECOMP 2011. Lecture Notes in Computer Science, vol 6894. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-24270-0_23
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DOI: https://doi.org/10.1007/978-3-642-24270-0_23
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