A new phishing campaign has been detected by security researchers at Microsoft that uses custom 404 pages to display a fake Office 365 login form. A single domain is used in this campaign and a custom 404 page is created that displays the fake Office 365 login form. The custom 404 page is displayed when any visitor to the website attempts to visit a non-existent web page. Since any URL could be entered to generate the 404 page, the attackers have an endless supply of phishing URLs to use in their campaign. The landing pages used in this phishing campaign are virtually indistinguishable from genuine...