Dec 9, 2020 2:20 PM PT Cybersecurity firm FireEye, which has been prominent in the fight against nation-state cyberthreats, has been itself attacked by "a highly sophisticated threat actor, one whose discipline, operational security, and techniques," company CEO Kevin Mandia announced Tuesday. This indicates the attack is likely state-sponsored, by a nation "with top-tier offensive capabilities." FireEye is investigating the incident together with the United States Federal Bureau of Investigation and other key partners, including Microsoft. The security vendor joined the Microsoft Intelligent Security Association (MISA) last year, an ecosystem of independent software vendors that have integrated their solutions for improved cybersecurity. FBI Cyber Division assistant director Matt Gorham reportedly said that preliminary indications "show an actor with a high level of sophistication consistent with a nation-state."