[MAIL] A massive suspected Russian cyber campaign is being called the biggest breach in American history and a 'grave threat' to the government and private companies, with the Senate's No. 2 Democrat demanding a 'response in kind.'The sprawling attack, which targeted critical government infrastructure using a Trojan horse hidden in network management software from SolarWinds Corp, also compromised broad swathes of the private sector, including Microsoft and likely most of the Fortune 500, it emerged on Thursday.
Officials say the attack went undetected for nearly nine months, allowing the hackers free range in the affected networks, including at the Pentagon, FBI, Treasury, State Department and nuclear security agencies, and that the true scale of the stolen information may never be known.