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LONDON – The loose-knit hacking movement "Anonymous" claimed Sunday to have stolen thousands of credit card numbers and other personal information belonging to clients of U.S.-based security think tank Stratfor.
One hacker said the goal was to pilfer funds from individuals' accounts to give away as Christmas donations, and some victims confirmed unauthorized transactions linked to their credit cards.
Anonymous boasted of stealing Stratfor's confidential client list, which includes entities ranging from Apple to the U.S. Air Force to the Miami Police Department, and mining it for more than 4,000 credit card numbers, passwords and home addresses.
"Not so private and secret anymore?" the group taunted in a message on Twitter, promising that the attack on Stratfor was just the beginning of a Christmas-inspired assault on a long list of targets.
Anonymous said the client list it posted was a small slice of the 200 gigabytes worth of plunder it stole from Stratfor and promised more leaks. It said it was able to get the credit details in part because Stratfor didn't bother encrypting them -- an easy-to-avoid blunder which, if true, would be a major embarrassment for any security-related company.
Austin, Texas-based Stratfor provides political, economic and military analysis to help clients reduce risk, according to a description on its YouTube page. It charges subscribers for its reports and analysis, delivered through the web, emails and videos.
Lt. Col. John Dorrian, public affairs officer for the Air Force, said that "for obvious reasons" the Air Force doesn't discuss specific vulnerabilities, threats or responses to them.
"The Air Force will continue to monitor the situation and, as always, take appropriate action as necessary to protect Air Force networks and information," he said in an email.
Miami Police Department spokesman Sgt. Freddie Cruz Jr. said that he could not confirm that the agency was a client of Stratfor, and he said he had not received any information about a security breach involving the police department.
It soon became clear that proprietary information about the companies and government agencies that subscribe to Stratfor's newsletters did not appear to be at any significant risk, and that the main threat was posed to individual employees.
Hours after publishing what it claimed was Stratfor's client list, Anonymous tweeted a link to encrypted files online with the names, addresses and account details.
"Not as many as you expected? Worry not, fellow pirates and robin hoods. These are just the "A"s," read a message posted online that encouraged readers to download a file of the hacked information.
It also linked to images online that it suggested were receipts for charitable donations made by the group manipulating the credit card data it stole.
"Thank you! Defense Intelligence Agency," read the text above one image that appeared to show a transaction summary indicating that an agency employee's information was used to donate $250 to a non-profit.
One receipt -- to the American Red Cross -- had Allen Barr's name on it.
Barr, of Austin, Texas, recently retired from the Texas Department of Banking and said he discovered last Friday that a total of $700 had been spent from his account. Barr, who has spent more than a decade dealing with cybercrime at banks, said five transactions were made in total.
"It was all charities, the Red Cross, CARE, Save the Children. So when the credit card company called my wife she wasn't sure whether I was just donating," said Barr, who wasn't aware until a reporter with the AP called that his information had been compromised when Stratfor's computers were hacked.
"It made me feel terrible. It made my wife feel terrible. We had to close the account."
Stratfor said in an email to members that it had suspended its servers and email after learning that its website had been hacked.
"We have reason to believe that the names of our corporate subscribers have been posted on other web sites," said the email, passed on to The Associated Press by subscribers. "We are diligently investigating the extent to which subscriber information may have been obtained."
The email, signed by Stratfor Chief Executive George Friedman, said the company is "working closely with law enforcement to identify who is behind the breach."
"Stratfor's relationship with its members and, in particular, the confidentiality of their subscriber information, are very important to Stratfor and me," Friedman wrote.
Repeated calls to Stratfor went unanswered Sunday and an answering machine thanked callers for contacting the "No. 1 source for global intelligence." Stratfor's website was down, with a banner saying "site is currently undergoing maintenance."
Wishing everyone a "Merry LulzXMas" -- a nod to its spinoff hacking group Lulz Security -- Anonymous also posted a link on Twitter to a site containing the email, phone number and credit number of a U.S. Homeland Security employee.
The employee, Cody Sultenfuss, said he had no warning before his details were posted.
"They took money I did not have," he told the AP in a series of emails, which did not specify the amount taken. "I think 'Why me?' I am not rich."
One member of the hacking group, who uses the handle AnonymousAbu on Twitter, claimed that more than 90,000 credit cards from law enforcement, the intelligence community and journalists -- "corporate/exec accounts of people like Fox" news -- had been hacked and used to "steal a million dollars" and make donations.
It was impossible to verify where credit card details were used. Fox News was not on the excerpted list of Stratfor members posted online, but other media organizations including MSNBC and Al-Jazeera English appeared in the file.
Anonymous warned it has "enough targets lined up to extend the fun fun fun of LulzXmas through the entire next week."
The group has previously claimed responsibility for attacks on companies such as Visa, MasterCard and PayPal, as well as others in the music industry and the Church of Scientology.