FBI declares suspected Chinese hack of U.S. surveillance system a ‘major cyber incident’

The FBI last week deemed a recent China-linked cyber intrusion into a sensitive agency surveillance system a “major incident,” meaning it poses significant risks to U.S. national security, according to one congressional aide and two U.S. officials with knowledge of the matter.

The bureau first told Congress on March 4 that it was investigating suspicious activity on an internal agency system that contained “law enforcement sensitive information.” The FBI did not publicly identify who was behind the activity at the time, but POLITICO previously reported that China is suspected.

The FBI determined the intrusion meets the definition of a major incident under a federal data security statute known as FISMA, said the three people. Congress was informed of the decision earlier this week, according to the aide. This person, like others in this report, was granted anonymity because they were not authorized to speak publicly on the investigation.

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