The insurance regulatory support group says most operations have returned to normal, but investment designations remain suspended and online invoice payments are unavailable.
The city says malicious activity disrupted network connections and online services, but it has not identified the attack type or a full restoration date.
In April 2025, Esse Health, one of the largest independent physician groups in the St. Louis, Missouri metropolitan area, suffered a cyberattack that severely disrupted operations across its 45 clinic