Last days my brother site (used joomla CMS) affected by Malicious Iframe in all html, php files
He say while he working in his own site the anti-virus start to complain about HTML/Framer virus every time load his home page, After fast check i find his site was victim of malicious inject
joomla and many other web CMS can be infected with this kind of attack
Example malicious site:
http://internetcountercheck.com
http://thedeadpit.com