Slow Scan Attack Detection Based on Communication Behavior

We present a novel method for detecting slow scan attacks. Attackers collect information about vulnerabilities in hosts by scan attacks and then penetrate the systems based on the collected information. Detection of scan attacks is therefore useful to avoid the following attacks. The intrusion detection system (IDS) has been proposed for detecting scan attacks. However, it cannot detect slow scan attacks that are executed slowly over a long period. In this paper, we introduce novel features that are useful to distinguish the difference in the communication behavior between the scanning hosts and the benign hosts. Then, we propose the detection method using the features. Furthermore, through the experiments, we confirm the effectiveness of our method for detecting a slow scan attack.