In one of the most audacious hacks in recent memory, U.S. government agencies were attacked as part of a global campaign that exploited a flaw in the software updates of a U.S. company. The hackers are suspected to be part of a notorious hacking group tied to the Russian government, the Washington Post reported.

The attack included breaches at the U.S. Treasury and Commerce departments and those of other government agencies in an attack that started months ago, the newspaper reported. The same hacking group is also believed to be behind the recent attack on the cyber-security firm FireEye Inc.

“We have identified a global campaign that introduces a compromise into the networks of public and private organizations through the software supply chain,” FireEye said in a blog post late Sunday, without naming a specific group for the breach.

FireEye described a highly sophisticated attack that exploited updates in widely used software from Austin, Texas-based SolarWinds Corp., which sells technology products to a…