mckesson.com Domain Breach Exposure Report
Risk Score
Massive event volume or critical assets compromised.
AI Findings Summary
The telemetry indicates a significant exposure event for McKesson, with over 100,000 recorded incidents between July 2025 and June 2026. The vast majority of these events, over 96,000, are classified as historical data breaches, while approximately 4,100 are active infostealer logs. Employee credentials appear to be the primary target, with 88,985 employee-related events, followed by 11,427 client-related events. Malware families such as Redline, LummaC2, and Rhadamanthys are prevalent in the infostealer logs, suggesting credential harvesting and potential further compromise. The data breaches and infostealer activity are concentrated on McKesson's portal and connection services, including mms.mckesson.com and connect.mckesson.com, primarily impacting users in the United States.
Total Events
Employee Affected Events
Client Affected Events
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12-Month Events Timeline
Event volume by breach date, employee VS client
Infostealers VS Data Breaches
Live stealer logs VS data breaches
88,985 compromised employee accounts pose an infrastructure risk, while 11,427 leaked client credentials create regulatory liability.
Antivirus Distribution
Security Tools on Infected Endpoints
Malware Families Distribution
Distribution of Active Stealer Strains
Top Login URLs
Top exposed services found in the event results
Infostealer By Geography
Shows the distribution of Infostealer-related credential exposure events across different geographic regions. The location is determined by analyzing the metadata of the infected machines associated with each event.
Country Breakdown
Services Classification Distribution
Blast radius - closer to core = more critical infrastructure, size = credential volume
Operating System Distribution
Distribution of compromised endpoint builds
Leak Repository Classification
Where the exposed records currently reside
Disclaimer: This report includes AI-generated content. AI can make mistakes, so verify important findings independently before taking action.