A new hacker group called Parastoo has claimed responsibility.
The International Atomic Energy Agency (IAEA) recently acknowleged that information stolen from one of its former servers had been posted online.
The data, published on Pastebin by hacker group Parastoo (which calls the leak "our first public message"), includes more than 150 e-mail addresses. "The leaked email addresses appear to be associated with various academics and government officials across the globe and include one employee in the U.S. Department of Energy’s Office of Science," writes Business Insider's Michael Kelley.
"The IAEA said the theft concerned 'some contact details related to experts working' with the Vienna-based agency but it did not say who might have been behind the action," Reuters reports. "A Western diplomat said the stolen data was not believed to include information related to confidential work carried out by the IAEA. ... IAEA spokeswoman Gill Tudor said the agency 'deeply regrets this publication of information stolen from an old server that was shut down some time ago.'"
"This step by the Parastoo group appears to be in response to the globe’s chief nuclear watchdog’s aggressive investigation into Iranian nuclear enrichment program, which detractors vociferously claim Tehran is undertaking in pursuit of possesing an atom bomb," writes Allvoices' Nina Rai. "The hacker group, in a statement while assuring IAEA that their sensitive information was safe with them, however said they would not guarantee the same 'if a Western-favored element entertains another sip of motorbike & magnetbomb [sic] cocktail,' in an obvious reference to the assassinations allegedly carried out by Israelis against Iranian nuclear scientists."