Fake Microsoft Updates pages Used in Attacks Targeting Firefox on Windows

Cyber criminals are now using fake Microsoft update website to launch fake Antivirus attack targeted at users of FireFox on Windows.  Chester Wisniewski, a Senior Security Advisor at Sophos Canada is warning of the new “distribution model” of a fake antivirus which attempts to fool customers into thinking they’re actually downloading and installing a security solution from Microsoft Update. 
Cyber crimials have created a fake page which looks like original Microsoft update page but the property of this web page is that it only comes when you are surfing on firefox on windows. This type of social engineering has been used many times to launch this type of attacks. In this attack a warning is shown to users with a message that Critical update is needed.
Users update their system to protect from attackers but they are actually infecting their system with a malicious software.