The FBI was a customer of a private company Team Cymru, a contract shows. The company is in the business of harvesting NetFlow – network protocol for collecting IP traffic information and monitoring network flow – data from ISPs in return for threat intelligence, and then selling it on.
The contract became public knowledge thanks to a Freedom of Information Act (FOIA) request filed by Motherboard which reveals that the federal agency's Cyber Division spent “tens of thousands” of dollars to get its hands on this data.
The deal was worth $76,450 and was made in 2017.