Black Hat Briefings, Usa 2007 [audio] Presentations From The Security Conference.

The web browser is ever increasing in its importance to many organizations. Far from its origin as an application for fetching and rendering HTML, today?s web browser offers an expansive attack surface to exploit. All the major browsers now include full-featured runtime engines for a variety of interpreted scripting languages, including the popular JavaScript. The web experience now depends more than ever on the ability of the browser to dynamically interpret JavaScript on the client. The authors present a software framework for the automated collection of JavaScript from the wild, the subsequent identification of malicious code, and characteristic analysis of malicious code once identified. Building on the work of several existing client honeypot implementations, our goal is to largely automate the painstaking work of malicious software collection. Our focus is on attacks using JavaScript for obfuscation or exploitation. The authors will present findings based on the deployment of a distributed network