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U.S. struck Iranian military computers after downing of drone

FILE - In this Thursday, Aug. 31, 2017, file photo, a flame burns at the Shell Deer Park oil refiner
The Shell Deer Park oil refinery in Texas on Aug. 31, 2017. Hackers believed to be working for the Iranian government have targeted U.S. agencies, as well as sectors of the economy, including oil and gas.
(Gregory Bull / Associated Press)

U.S. military cyberforces launched a strike against Iranian military computer systems on Thursday as President Trump backed away from plans for a more conventional military strike in response to Iran’s downing of a U.S. surveillance drone, U.S. officials said Saturday.

Two officials told the Associated Press that the strikes were conducted with approval from Trump. A third official confirmed the broad outlines of the strike. All spoke on condition of anonymity because they were not authorized to speak publicly about the operation.

The cyberattacks — a contingency plan developed over weeks amid escalating tensions — disabled Iranian computer systems that controlled rocket and missile launchers, the officials said. Two of the officials said the attacks, which specifically targeted Iran’s Islamic Revolutionary Guard Corps computer system, were provided as options after Iranian forces blew up two oil tankers this month.

The Revolutionary Guard, which was designated a foreign terrorist group by the Trump administration this year, is a branch of the Iranian military.

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The action by U.S. Cyber Command was a demonstration of the U.S.'s increasingly mature cybermilitary capabilities and its more aggressive cyberstrategy under the Trump administration. Over the last year U.S. officials have focused on persistently engaging with adversaries in cyberspace and undertaking more offensive operations.

Tensions have escalated between the two countries ever since the U.S. withdrew last year from the 2015 nuclear deal with Iran and began a policy of “maximum pressure.” Iran has since been hit by multiple rounds of sanctions. Tensions increased this past week after Iran shot down an unmanned U.S. drone — an incident that nearly led to a U.S. military strike against Iran on Thursday evening.

The cyberattacks are the latest chapter in the U.S. and Iran’s ongoing cyberoperations targeting the other. Yahoo News first reported the cyberstrike.


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