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Capturing Fast-Flux Service Networks (FFSNs) by temporal variances is an intuitive way for seeking to identify rapid changes of DNS records. Unfortunately, the features regard to temporal variances would lead to the delay detection (more than one hour) of FFSN which could cause more damages, such as Botnet propagation and malware delivery. In this study, we(More)
Through the rapid evaluation of spam, no fully successful solution for filtering spam has been found. However, the spammers still spread spam by using the same intentions such as advertising and phishing. In this investigation, we propose a mechanism of E-mail Words Social Network (EWSN) for profiling users' intentions related to interesting and(More)
Although there is immense data available from networks and hosts, a very small proportion of this data is labeled due to the cost of obtaining expert labels. This proves to be a significant bottle-neck for developing supervised intrusion detection systems that rely solely on labeled data. In spite of the data being collected from real network environments(More)
What are the patterns that typical network attackers ex-hibit? For a given malicious network behaviors, are its attacks spread uniformly over time? In this work, we develop MalSpot, multi-resolution and multi-linear (Multi 2) network analysis system in order to discover such malicious patterns, so that we can use them later for attack detection , when(More)
Web applications suffer from cross-site scripting (XSS) attacks that resulting from incomplete or incorrect input sanitization. Learning the structure of attack vectors could enrich the variety of manifestations in generated XSS attacks. In this study, we focus on generating more threatening XSS attacks for the state-of-the-art detection approaches that can(More)
We propose a graphical signature for intrusion detection given alert sequences. By correlating alerts with their temporal proximity, we build a probabilistic graph-based model to describe a group of alerts that form an attack or normal behavior. Using the models, we design a pairwise measure based on manifold learning to measure the dis-similarities between(More)