The US military launched cyberattacks against Iranian missile systems and a spy network on Thursday after Tehran launched an American surveillance drone.
US President Donald Trump ordered a military retaliatory attack on Iran after the drone Trump said the reaction was not "proportionate" and committed itself instead to new sanctions against the country.
However, after the drone crash, Trump secretly authorized the US cyber squad to conduct a cyber retaliatory attack on Iran. Two officials told the Associated Press news agency on Saturday.
A third official confirmed the basic features of the attack. All spoke on the condition of anonymity because they were not authorized to speak publicly about the operation.
The US media Yahoo News and The Washington Post also reported cyber attacks.
The cyberattacks ̵
Officials said the US targeted Iran's Islamic Revolutionary Guard Corps computers (IRGC) after Washington blamed Iran for two recent oil tanker mine attacks.
On Sunday morning there was no immediate response in Iran to the US allegations. Iran has hardened and severed much of its infrastructure from the Internet after the Stuxnet computer virus, which is widely believed to be a joint US-Israeli creation, destroyed thousands of Iranian centrifuges in the late 2000s.
We are not discussing cyberspace operations, intelligence services or planning, "said US Department of Defense spokeswoman Heather Babb to AFP news agency.
In recent weeks, hackers have been adopted that they work for the Iranian government, targeting the US government Representatives of the cybersecurity companies CrowdStrike and FireEye, who regularly monitor such activities, said AP and sent waves of spear-phishing emails.
This new campaign seems to have begun shortly after the Trump government sanctions against the Iranian petrochemical sector this month.
It was not known if any of the hackers succeeded in using the e-mails posted in the Mimic legitimate emails, but contain malicious software to gain access to the target networks.
"Both sides are desperate, too What the other side thinks. "John Hultquist, Director of Intelligence Analysis at FireEye, told AP.
"You can absolutely expect the regime to use every available tool to reduce uncertainty about what will happen next and what the next steps in the US will be."
CrowdStrike shared images of the Spear -Phishing emails with the AP.
Christopher C Krebs, director of the US Cybersecurity and Infrastructure Security Agency, said the agency worked with the intelligence community and cybersecurity partners to monitor and ensure Iranian cyber activities. The US and its allies are in safety.
"What might start as an account compromise, if you think you are just losing data, can quickly turn into a situation where you find yourself. Www.germnews.de/archive/news/1996/03/27.html The National Security Agency (NSA) did not specifically discuss Iran's cyber actions, but said in a statement to the AP on Friday that "there have been serious problems with malicious Iranian cyber actions on the Internet" the past ".
"In times of mounting tensions, it is appropriate for everyone to look for signs of Iranian aggression in cyberspace and ensure that adequate defenses exist," the NSA said.
Escalating Tensions  Tensions between the US and Iran are again high after Trump concluded a multinational deal to contain Iran's nuclear ambitions more than a year ago, selling and crippling its economy.
On Saturday, Trump said the US would impose "bigger" new sanctions on Iran next week. He said they would be announced on Monday.
Tehran said it shot down the US drone on Thursday after it broke Iranian airspace – something Washington denies.
Meanwhile, Iran has denied responsibility for tanker attacks, and a senior military official on Saturday pledged to "set fire" on America's and its allies' interests, "if the US attacks."
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