Notorious ransomware group claims responsibility for attacks roiling US pharmacies

ALPHV/BlackCat claimed responsibility for an ongoing ransomware and extortion attack against Change Healthcare (a UnitedHealth Group subsidiary) that disrupted payment processing for thousands of pharmacies and healthcare providers; the group asserted it exfiltrated over 6 TB of sensitive data — including PII, military records, payment and claims data, and source code — while authorities (FBI, DOJ, CISA) and the company investigate and respond.