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Also: The End of an Era at Mandiant and Privacy and Ethics Concerns Related to LLMsIn the latest weekly update, ISMG editors discussed the implications of Kevin Mandia stepping down as Mandiant CEO; UnitedHealth Group's responsibility for a massive HIPAA breach at its subsidiary, Change Healthcare; and privacy concerns over large language models.

Telecom Company Also Faces OAIC Investigation and Potentially Millions in FinesThe Australian Communications and Media Authority says it has filed proceedings against Optus in a federal court as the company failed to protect sensitive customer data during a data breach in September 2022. The Office of the Australian Information Commissioner is also investigating the incident.

It's the Latest Hack Reported in Recent Weeks by an Ambulance Services ProviderAn Illinois-based air-ground ambulance company is notifying more than 858,000 individuals that their sensitive information was compromised in a hacking incident that happened about a year ago. The breach is the latest hack on an ambulance company reported to regulators in recent weeks.

Also: Spanish Hacker Alcasec Arrested AgainThis week, Fluent Bit contains a flaw, Microsoft is nuking VBScript, Irish police and the SEC face fines, a man was sentenced for BEC, a flaw was found in Netflix's Genie, an Australia university said it was breached and Black Basta claimed an attack, and hacker Alcasec was arrested again.

Medical Associations Ask HHS to Clarify HIPAA Duties in Change Healthcare HackMore than 100 medical associations and industry groups representing tens of thousands of U.S. doctors and healthcare professionals have banded together to urge federal regulators to hold Change Healthcare responsible for breach notifications related to a massive February ransomware attack.