Antivirus software powerless against Sony hackers(google.com)

http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=newssearch&cd=2&cad=rja&uact=8&ved=0CCsQqQIoADAB&url=http%3A%2F%2Fwww.usatoday.com%2Fstory%2Ftech%2F2014%2F12%2F06%2Fsony-attack-new-era-nuclear-option%2F19963063%2F&ei=dt6DVMv8FdPmuQSTn4GABg&usg=AFQjCNFNNGW0bavbWCrstSRrALvQ1BufGQ&bvm=bv.80642063,d.c2E