Incident Score: Analysis & Impact (MCK1789021407)
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Rankiteo Score Impact Analysis
Key Highlights From The Incident Analysis
- Timeline of McKesson's Breach and lateral movement inside company's environment.
- Overview of affected data sets, including SSNs and PHI, and why they materially increase incident severity.
- How Rankiteo’s incident engine converts technical details into a normalized incident score.
- How this cyber incident impacts McKesson Rankiteo cyber scoring and cyber rating.
- Rankiteo’s MITRE ATT&CK correlation analysis for this incident, with associated confidence level.
Full Incident Analysis Transcript
In this Rankiteo incident briefing, we review the McKesson breach identified under incident ID MCK1789021407.
The analysis begins with a detailed overview of McKesson's information like the linkedin page: https://www.linkedin.com/company/mckesson, the number of followers: 611876, the industry type: Hospitals and Health Care and the number of employees: 25352 employees
After the initial compromise, the video explains how Rankiteo's incident engine converts technical details into a normalized incident score. The incident score before the incident was 820 and after the incident was 777 with a difference of -43 which is could be a good indicator of the severity and impact of the incident.
In the next step of the video, we will analyze in more details the incident and the impact it had on McKesson and their customers.
McKesson recently reported "McKesson Hit by ShinyHunters Extortion Campaign, 6.4M Emails Leaked", a noteworthy cybersecurity incident.
In a recent cybersecurity incident, healthcare giant McKesson was targeted in an extortion campaign by the threat actor group ShinyHunters last month.
The disruption is felt across the environment, and exposing 6.4 million email addresses, with nearly 6.4 million records at risk.
Formal response steps have not been shared publicly yet.
The case underscores how Ongoing.
Finally, we try to match the incident with the MITRE ATT&CK framework to see if there is any correlation between the incident and the MITRE ATT&CK framework.
The MITRE ATT&CK framework is a knowledge base of techniques and sub-techniques that are used to describe the tactics and procedures of cyber adversaries. It is a powerful tool for understanding the threat landscape and for developing effective defense strategies.
MITRE ATT&CK® Correlation Analysis
Rankiteo's analysis has identified several MITRE ATT&CK tactics and techniques associated with this incident, each with varying levels of confidence based on available evidence. Under the Initial Access tactic, the analysis identified Phishing (T1566) with moderate confidence (50%), supported by evidence indicating 6.4 million email addresses exposed, including marketing campaigns and Exploit Public-Facing Application (T1190) with lower confidence (40%), supported by evidence indicating healthcare giant targeted by ShinyHunters (extortion campaign). Under the Credential Access tactic, the analysis identified Compromise Accounts (T1586) with moderate confidence (60%), supported by evidence indicating 66% of exposed emails linked to LinkedIn profiles and third-party services and Unsecured Credentials: Credentials In Files (T1552.001) with moderate confidence (50%), supported by evidence indicating email addresses from patients, staff, and marketing campaigns leaked. Under the Collection tactic, the analysis identified Data from Local System (T1005) with moderate to high confidence (70%), supported by evidence indicating 6.4 million email addresses compromised and Data from Information Repositories (T1213) with moderate confidence (60%), supported by evidence indicating data from marketing campaigns, patients, and staff exposed. Under the Exfiltration tactic, the analysis identified Exfiltration Over C2 Channel (T1041) with moderate to high confidence (80%), supported by evidence indicating leaked data was subsequently published by ShinyHunters and Exfiltration Over Web Service (T1567) with moderate confidence (60%), supported by evidence indicating 6.4 million email addresses exposed and published. Under the Impact tactic, the analysis identified Data Encrypted for Impact (T1486) with lower confidence (30%), supported by evidence indicating extortion campaign by ShinyHunters (financial gain motivation) and Defacement (T1491) with lower confidence (40%), supported by evidence indicating potential widespread exposure of sensitive information. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.
Sources & References
- McKesson Rankiteo Cyber Incident Details: https://www.rankiteo.com/company/mckesson/incident/MCK1789021407
- McKesson CyberSecurity Rating page: https://www.rankiteo.com/company/mckesson
- McKesson Rankiteo Cyber Incident Blog Article: https://blog.rankiteo.com/mck1789021407-mckesson-breach-august-2026/
- McKesson CyberSecurity Score History: https://www.rankiteo.com/company/mckesson/history
- McKesson CyberSecurity Incident Source: https://www.linkedin.com/feed/update/urn:li:activity:7503692380789760000
- Rankiteo A.I CyberSecurity Rating methodology: https://www.rankiteo.com/Images/rankiteo_algo.pdf
- Rankiteo TPRM Scoring methodology: https://static.rankiteo.com/model/rankiteo_tprm_methodology.pdf