ClickJacking and Spoofing Attack Example - Trusted User Interface attack. It used to be that the most common operating system and browser being targeted for this kind of attack is Windows and IE. The underlying reason was that Windows has more users and Internet Explorer was basically File Explorer having a different user interface. Today, the attack surface is wider and much more complicated to notice. The screenshot posted here is a combination of a User Interface (UI) spoofing from a ClickJack.