Incident Score: Analysis & Impact (CARCOLCAR1768343725)
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Rankiteo Score Impact Analysis
Key Highlights From The Incident Analysis
- Timeline of CareOregon'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 CareOregon 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 CareOregon breach identified under incident ID CARCOLCAR1768343725.
The analysis begins with a detailed overview of CareOregon's information like the linkedin page: https://www.linkedin.com/company/careoregon, the number of followers: 15849, the industry type: Insurance and the number of employees: 989 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 726 and after the incident was 643 with a difference of -83 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 CareOregon and their customers.
On 26 December 2024, CareOregon disclosed Data Breach issues under the banner "CareOregon Data Breach".
CareOregon, which serves about 500,000 low-income residents on the Oregon Health Plan, notified more than 5,000 people in December that their information had been ‘viewed’ and could be used to file fake claims.
The disruption is felt across the environment, and exposing Names, dates of birth, Medicaid/Medicare numbers, health plan information, primary care provider details, with nearly 5,473 records at risk.
In response, teams activated the incident response plan, moved swiftly to contain the threat with measures like Investigated and fixed the issue, changed how information can be viewed, and began remediation that includes Re-trained staff, and stakeholders are being briefed through Letter to affected members, public notice via Oregon Department of Justice.
The case underscores how Ongoing, and recommending next steps like Monitor financial information for fraudulent activity, Review health service claims for discrepancies and Obtain free credit reports annually, with advisories going out to stakeholders covering Members advised to monitor for fraudulent activity and report discrepancies in health service claims.
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 Valid Accounts (T1078) with moderate to high confidence (80%), with evidence including unauthorized access to sensitive personal information, and exact cause whether internal or external remains unclear and Exploit Public-Facing Application (T1190) with lower confidence (40%), supported by evidence indicating breach occurred between late May and October 2025, involved unauthorized access. Under the Credential Access tactic, the analysis identified Unsecured Credentials (T1552) with moderate to high confidence (70%), supported by evidence indicating changed how information can be viewed, re-trained staff and Valid Accounts (T1078) with moderate to high confidence (80%), supported by evidence indicating unauthorized access to personal information including Medicaid/Medicare numbers. Under the Collection tactic, the analysis identified Data from Local System (T1005) with high confidence (90%), supported by evidence indicating names, dates of birth, Medicaid/Medicare numbers, health plan information compromised. Under the Exfiltration tactic, the analysis identified Exfiltration Over C2 Channel (T1041) with moderate confidence (60%), supported by evidence indicating data breach affecting 5,473 members, could be used to file fraudulent insurance claims and Data from Cloud Storage (T1530) with moderate confidence (50%), supported by evidence indicating unauthorized access to health-related information. Under the Impact tactic, the analysis identified Defacement (T1491) with lower confidence (30%), supported by evidence indicating public notice via Oregon Department of Justice and Data Manipulation: Stored Data Manipulation (T1565.001) with moderate to high confidence (70%), supported by evidence indicating exposed data could be used to file fraudulent insurance claims. Under the Defense Evasion tactic, the analysis identified Valid Accounts (T1078) with moderate to high confidence (80%), supported by evidence indicating unauthorized access remained undetected for months (May-October 2025) and Hide Artifacts: Hidden Files and Directories (T1564.001) with moderate confidence (50%), supported by evidence indicating exact cause of breach remains unclear. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.
Sources & References
- CareOregon Rankiteo Cyber Incident Details: https://www.rankiteo.com/company/careoregon/incident/CARCOLCAR1768343725
- CareOregon CyberSecurity Rating page: https://www.rankiteo.com/company/careoregon
- CareOregon Rankiteo Cyber Incident Blog Article: https://blog.rankiteo.com/carcolcar1768343725-careoregon-columbia-pacific-jackson-care-connect-breach-october-2025/
- CareOregon CyberSecurity Score History: https://www.rankiteo.com/company/careoregon/history
- CareOregon CyberSecurity Incident Source: https://www.thelundreport.org/content/oregon-medicaid-insurers-data-breach-could-lead-insurance-fraud-0
- 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