"WASHINGTON -- Last year the hacker group Anonymous broke into computer systems of oil companies including Shell, Exxon Mobil and BP as a protest against Arctic drilling. The next month, a different set of hackers infected the computers of Saudi Arabia’s national oil company with a damaging virus that knocked 30,000 workstations offline."
"Security analysts and U.S. government officials say such strikes are just the beginning, and that energy is by far the most attractive industry target for cyberattackers.
'The threat is huge,' said Joseph McClelland, who leads a U.S. federal office created last year in an attempt to blunt attacks on energy infrastructure. 'The activity is already high and it’s increasing.'"