Executive Assistant Director for Cybersecurity at CISA Jeff Greene said it would be “impossible for us to predict a time frame” when the hackers will be completely expelled.
Unnamed senior officials said their investigation “might take years to complete,” the Post reported.
An unnamed official working for a federal agency communicated the magnitude of the breach, calling it “broad and significant,” with a “large amount” of information stolen.
The hackers reportedly intercepted phone calls with government officials and politicians, with at least one person who has ties to President-elect Donald Trump being targeted.
Hackers also obtained many records that revealed which phone numbers had communicated with one another, but in those instances they did not access the content of calls or texts. The FBI indicated most of the breaches occurred Washington D.C.