FBI seems to consider seriously the list of IP addresses involved in the hack of US CENTCOM social media accounts and provided by members of Anonymous. FBI is investigating on IP addresses released by the Anonymous collective in a wake of the hijacking of the U.S. CENTCOM accounts. Anonymous members have collected the IP addresses of the alleged hackers who breached the accounts. The US Army confirmed that hackers have had access only to social media account by that havent had access to internal system to spread malicious code or to conduct other malicious activities.”]
Source: http://securityaffairs.co/wordpress/32403/cyber-crime/anonymous-fbi-us-centcom-hack.html