PhishTime: Continuous Longitudinal Measurement of the Effectiveness of Anti-phishing Blacklists
Abstract: Due to their ubiquity in modern web browsers, anti- phishing blacklists are a key defense against large-scale phishing attacks. However, sophistication in phishing websites—such as evasion techniques that seek to defeat these blacklists—continues to grow. Yet, the effectiveness of blacklists against evasive websites is difficult to measure, and there have been no methodical efforts to make and track such measurements, at the ecosystem level, over time.
We propose a framework for continuously identifying un- mitigated phishing websites in the wild, replicating key as- pects of their configuration in a controlled setting, and generat- ing longitudinal experiments to measure the ecosystem’s pro- tection. In six experiment deployments over nine months, we systematically launch and report 2,862 new (innocuous) phish- ing websites to evaluate the performance (speed and coverage) and consistency of blacklists, with the goal of improving them.