Corewell Health Breach Incident Score: Analysis & Impact (OLECOR1774664850)

In this Rankiteo incident briefing, we review the Corewell Health breach identified under incident ID OLECOR1774664850.

The analysis begins with a detailed overview of Corewell Health's information like the linkedin page: https://www.linkedin.com/company/corewell-health, the number of followers: 66399, the industry type: Hospitals and Health Care and the number of employees: 41961 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 572 and after the incident was 512 with a difference of -60 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 Corewell Health and their customers.

Corewell Health recently reported "Corewell Health Data Breach Exposes Personal Information of 19,000 Patients", a noteworthy cybersecurity incident.

Corewell Health disclosed a 2024 security breach affecting approximately 19,000 patients, following a notification from Pinnacle Holdings LTD, a Colorado-based vendor that previously provided healthcare consulting services.

The disruption is felt across the environment, and exposing Sensitive personal and medical information, including names, addresses, Social Security numbers, driver’s license details, dates of birth, medical diagnoses, prescription records, treatment information, biometric data, and digital signatures, with nearly 19,000 records at risk.

In response, and began remediation that includes Additional security measures implemented by Pinnacle Holdings LTD, and stakeholders are being briefed through Notification letters mailed to affected individuals.

The case underscores how Ongoing, teams are taking away lessons such as Ongoing vulnerabilities in third-party vendor security within the healthcare sector, with advisories going out to stakeholders covering Free credit monitoring and identity protection services offered to affected individuals.

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.

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 Supply Chain Compromise (T1195) with high confidence (90%), with evidence including supply chain such as true, and third-party vendor security vulnerabilities and Compromise Software Supply Chain (T1195.002) with moderate to high confidence (80%), supported by evidence indicating pinnacle Holdings LTD, a Colorado-based vendor. Under the Credential Access tactic, the analysis identified Steal Application Access Token (T1528) with moderate to high confidence (70%), supported by evidence indicating biometric data and digital signatures compromised and OS Credential Dumping (T1003) with moderate confidence (60%), supported by evidence indicating social Security numbers, driver’s license details exposed. Under the Collection tactic, the analysis identified Data from Local System (T1005) with high confidence (90%), supported by evidence indicating medical diagnoses, prescription records, treatment information and Data from Information Repositories (T1213) with moderate to high confidence (80%), supported by evidence indicating healthcare consulting services vendor data compromised. Under the Exfiltration tactic, the analysis identified Exfiltration Over C2 Channel (T1041) with moderate to high confidence (70%), supported by evidence indicating 19,000 patients data exposed via third-party vendor and Transfer Data to Cloud Account (T1537) with moderate confidence (50%), supported by evidence indicating vendor-based breach with no fraudulent activity reported. Under the Impact tactic, the analysis identified Data Destruction (T1485) with lower confidence (40%), supported by evidence indicating no details on malware’s origin or extent of breach and Stored Data Manipulation (T1565.001) with moderate confidence (50%), supported by evidence indicating high identity theft risk for affected individuals. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.