Healthcare Giant McKesson Investigates Data Breach Incident

McKesson, a major US healthcare distributor, is investigating a breach tied to unauthorized access and data exfiltration from third‑party applications; threat actors claiming responsibility (ShinyHunters) allege up to 284 million records were taken and a $55M ransom demand made, with the incident reportedly stemming from social engineering against employees and affecting Oncology & Multispecialty and Medical‑Surgical customer subsets.