Ad“This is a sophisticated actor who did their best to hide their tracks,” she told reporters at the White House.
It will take us some time to uncover this layer by layer.”U.S. authorities have said the breach, disclosed in December, appeared to be the work of Russian hackers.
“This isn’t the only case of malicious cyber activity of likely Russian origin, either for us or for our allies and partners,” Neuberger added.
Intelligence agencies did not detect the breach because they largely have "no visibility into private-sector networks," and it was launched within the U.S., Neuberger said.
The Biden administration supports changes to “culture and authorities” that prevented the hack from being detected on the federal civilian systems, she added.