Web Canary: A Virtualized Web Browser to Support Large-Scale Silent Collaboration in Detecting Malicious Web Sites

Abstract. Malicious Web content poses a serious threat to the Inter-net, organizations and users. Current approaches to detecting malicious Web content employ high-powered honey clients to scan the Web for potentially malicious pages. These approaches, while effective at detect-ing malicious content, have the drawbacks of being few and far between, presenting a single snapshot in time of very dynamic phenomena, and having artificial test data. To address these problems, we developed a virtualized Web browser that uses large-scale collaboration to identify URLs that host malicious content on a continuing basis by building in an elective reporting system. The system, which we call a Web canary, runs a standard Web browser in a known, pristine OS every time the browser starts. Users not only report malicious URLs but also benefit from protection against malicious content. Experimental results show that it can detect the malicious Web pages effectively with acceptable overhead