Compromised websites are an integral part of the cybercrime ecosystem. They are used by cybercriminals to host a wide range of malicious content, including phishing sites, exploit kits, redirects to other malicious sites, and other tools needed to carry out attacks. Why? One reason is because there is an abundance of insecure websites around the world that can be easily compromised. Another reason is because legitimate sites that have only been recently compromised are less likely to be blacklisted by internet browsers and other security measures.