The Anonymous Hacking Group posted on Twitter that on Christmas day they stole addresses and credit card information from Starfor members.
According to some analysis made for The Guardian by John Bumgarner, expert in computer security at US Cyber Consequences Unit, the hackers stole information about British intelligence officials and United States military personnel.
Regarding the United States, the hackers stole information about 173 people who served in Afghanistan as well as personal data about the former Vice President Dan Quayle and former State Secretary Henry Kissinger.
Around 221 British officials and 242 NATO members were the victims of this hacking attack, as well as Joint Intelligence Organization officials, a institution that handles sensible information for British Prime Minister David Cameron.
Approximately 19,000 email addresses belonging to United States military personnel were published.
The Stratfor agency, located in Texas, is specialized in security problems and foreign policy.
Hackers said that they were able to get the information because Strafor failed to encrypt them.