Kootenai Health sends notifications for 464,088 people after February attack

Kootenai Health disclosed a major breach affecting 464,088 patients, employees, and dependents after unusual activity on March 2, 2024 disrupted IT systems; investigation found an unknown actor accessed data around February 22, 2024, potentially exposing names, DOBs, SSNs, IDs, medical and insurance details. The ThreeAM (3am) group listed Kootenai on its leak site and allegedly dumped 9.5 GB of data, while Kootenai reports no known misuse to date; key questions remain about encryption, negotiations, HHS notification, and the breakdown of affected individuals.