Iranian retaliation would be costly to Iran and those involved. A federal website was offline Sunday after a hacker uploaded photos to the site that included an Iranian flag and an image depicting a bloodied President Donald Trump being punched in the face. The images appeared on the Federal Depository Library Program program's website late Saturday before the site was taken offline. The Cybersecurity and Infrastructure Security Agency, a division of the Department of Homeland Security, said it was monitoring the situation.
"We are aware the website of the Federal Depository Library Program was defaced with pro-Iranian, anti-US messaging," the cybersecurity agency said in a statement. "At this time, there is no confirmation that this was the action of Iranian state-sponsored actors. The website was taken offline and is no longer accessible." The statement added that "in these times of increased threats" all organizations should increase cyber monitoring, back up IT systems, implement secure authentication and have an incident response plan ready should a hack take place.
DHS also issued a two-week National Terrorism System advisory noting the U.S. drone strike in Iraq last week that killed Iran commander Qasem Soleimani. That led Iran and several affiliated extremist organizations to publicly state they intend to retaliate against the United States.