The real Iranian threat: Cyberattacks

Iran's quest for a nuclear weapon has been the subject of much debate this election season, but the presidential candidates rarely discuss the most imminent danger Iran poses to the United States: cyberwarfare.

Iran is believed to be behind a slew of massive attacks in September that took down a string of U.S. banks' websites. The country is also thought to have launched a devastating cyber time bomb on Saudi Oil company Aramco in August and to have coordinated a similar attack on Qatar's RasGas, an Exxon Mobil subsidiary. The bank attacks were 10 to 20 times bigger than a typical denial of service attack, and doubled the previous record for traffic maliciously directed at a particular site, according to CrowdStrike, a security firm that investigated the attacks. The Aramco attack, set to go off on an Islamic holy night, unleashed a virus that destroyed about 30,000 corporate computers -- three-quarters of the company's PCs. It's a show of muscle the United States and its allies are unaccustomed to seeing from Iran.