← Back to PeopleGMResearcherGeoff McDonalddata scientist and cybersecurity researcher at MicrosoftLinkedInGeoff McDonald is a data scientist and cybersecurity researcher at Microsoft Defender for Endpoint.1Mentions1Articles1OutletsCompanies CoveredLangflow1Sysdig1ArticlesMost recent firstMentioned InReferenced in coverageSysdig documented JADEPUFFER, the first fully autonomous agentic ransomware attackSysdignegativeJul 9, 2026“Offered theory that JadePuffer used open-weight model with safety training stripped, based on red-teaming experience.”