Secretary of the Treasury Steven Mnuchin, March 13, 2020, outside of the West Wing of the White House. The department was among the entities breached in a malicious supply chain attack using the SolarWinds IT management platform. (Official White House Photo by Keegan Barber)

The Department of Homeland Security's cybersecurity agency is demanding drastic action of federal agencies, after the Department of Treasury and National Telecommunications and Information Administration were breached in a malicious supply chain attack using the SolarWinds IT management platform.

The Cybersecurity and Infrastructure Security Agency released Emergency Directive 21-01 Sunday evening, following a Reuters report that hackers had exfiltrated information from NTIA and Treasury. The Washington Post later tied those attacks to last week's FireEye attacks and all three to Russian intelligence, specifically APT 29.

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