Iranian hackers launching disruptive attacks at U.S. energy, water targets, feds warn

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Iranian government hackers are launching disruptive cyberattacks on American energy and water infrastructure, U.S. government agencies “urgently” warned Tuesday.

The hackers are taking aim at devices and systems that control industrial processes, and have harmed victims in the last month following the onset of U.S.-Israel strikes against Iran, according to the joint alert from the FBI, National Security Agency, Cybersecurity and Infrastructure Security Agency, Environmental Protection Agency, Energy Department and Cyber Command.

“Iran-affiliated advanced persistent threat (APT) actors are conducting exploitation activity targeting internet-facing operational technology (OT) devices, including programmable logic controllers (PLCs) manufactured by Rockwell Automation/Allen-Bradley,” the alert states. “This activity has led to PLC disruptions across several U.S. critical infrastructure sectors through malicious interactions with the project file and manipulation of data on human machine interface (HMI) and supervisory control and data acquisition (SCADA) displays.”

U.S. government agencies have warned before about Iranian hackers going after similar targets with those similar methods. The first such warning came after an Iranian government-linked group took credit for attacking a Pennsylvania water facility in late 2023.

Since March of this year, however, the agencies said they have seen new victims emerge from an advanced persistent threat group tied to Iran.

“The authoring agencies identified (through engagements with victim organizations) an Iranian-affiliated APT-group that disrupted the function of PLCs,” the alert reads. “These PLCs were deployed across multiple U.S. critical infrastructure sectors (including Government Services and Facilities, WWS, and Energy sectors) within a wide variety of industrial automation processes. Some of the victims experienced operational disruption and financial loss.”

The earlier campaign compromised at least 75 devices, the alert states.

The latest disruptions include “maliciously interacting with project files, and manipulating data displayed on HMI and SCADA displays,” according to the agencies’ warning.

After the U.S.-Israel conflict with Iran began, Tehran-connected hackers claimed victims including major medtech company Stryker, local governments and more.

The FBI warned last month that Iranian hackers were deploying malware over the Telegram app, although that campaign also predated the current Iran conflict.

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