Ransomware Attack on Oklahoma Medical Center Impacts 133,000

Great Plains Regional Medical Center in Oklahoma is notifying over 133,000 individuals that their personal information was compromised in a ransomware attack.

The public, not-for-profit healthcare system discovered the attack on September 8, 2024, when ransomware was deployed, but the attackers had access to its systems for at least three days prior.

According to the medical center, the attackers accessed and encrypted certain files between September 5 and September 8, and exfiltrated information from its systems.