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How weak passwords and other failings led to catastrophic breach of Ascension


A deep-dive into Active Directory and how “Kerberoasting” breaks it wide open.

Last week, a prominent US senator called on the Federal Trade Commission to investigate Microsoft for cybersecurity negligence over the role it played last year in health giant Ascension's ransomware breach, which caused life-threatening disruptions at 140 hospitals and put the medical records of 5.6 million patients into the hands of the attackers. In a letter sent last week to FTC Chairman Andrew Ferguson, Sen. Ron Wyden (D-Ore.) said an investigation by his office determined that the hack began in February 2024 with the infection of a contractor's laptop after they downloaded malware from a link returned by Microsoft’s Bing search engine. Wyden blasted Microsoft for its continued support of its three-decades-old implementation of the Kerberos authentication protocol that uses an insecure cipher and, as the senator noted, exposes customers to precisely the type of breach Ascension suffered.

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