A Russian-speaking hacking group obtained access to the email addresses of about 632,000 US federal employees at the departments of Defense and Justice as part of the sprawling MOVEit hack last summer.
Several U.S. federal government agencies have been hit in a global hacking campaign that exploited a vulnerability in widely used file-transfer software, the nation's cyber watchdog agency said on Thursday.
The U.S. State Department was recently targeted by a cyber assault, and the Department of Defense Cyber Command issued warnings about a potential catastrophic compromise.