What is an IFrame Injection? Mass IFrame Attack Tutorial

Recently 90000 webpages infected by Iframe Injection attack.  Here i am going to explain what  IFrame Injection is.

What is an IFrame Injection?

Using IFrame tag, The Attackers injects the malware contain website(links) using Cross site Scripting in popular websites.  So if the usual visitors of that popular sites opens the website, it will redirect to malware contain website.  Malware  will be loaded to your computer, now you are infected