DHS expects Iran’s cyber forces will target US networks after strikes on nuclear sites

Iran has often targeted U.S. digital systems. Last year, Iranian hackers pilfered and distributed sensitive documents from inside President Donald Trump’s 2024 campaign.

Iran-linked hackers and other groups affiliated with Tehran will likely launch cyberattacks against U.S. targets in response to President Donald Trump’s order to strike three of Iran’s nuclear sites, according to a Department of Homeland Security bulletin issued Sunday.

“Low-level cyber attacks against U.S. networks by pro-Iranian hacktivists are likely, and cyber actors affiliated with the Iranian government may conduct attacks against U.S. networks,” said the alert from the National Terrorism Advisory System.

The notice, scheduled to expire Sept. 22, adds that “hacktivists and Iranian government-affiliated actors routinely target poorly secured U.S. networks and internet-connected devices for disruptive cyber attacks.”

Under orders from Trump, U.S. bombers struck the Fordow, Natanz and Isfahan nuclear facilities in Iran on Saturday ...