Incident Score: Analysis & Impact (ONCKRO1779972089)
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Rankiteo Score Impact Analysis
Key Highlights From The Incident Analysis
- Timeline of Kroll Cyber and Data Resilience'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 Kroll Cyber and Data Resilience 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 Kroll Cyber and Data Resilience breach identified under incident ID ONCKRO1779972089.
The analysis begins with a detailed overview of Kroll Cyber and Data Resilience's information like the linkedin page: https://www.linkedin.com/company/kroll-cyber, the number of followers: 6058, the industry type: Computer and Network Security and the number of employees: None 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 754 and after the incident was 692 with a difference of -62 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 Kroll Cyber and Data Resilience and their customers.
On 03 November 2025, The Oncology Institute (TOI) disclosed Data Breach issues under the banner "Cybersecurity Incident at The Oncology Institute Exposes Patient Data via Third-Party Vendor".
The Oncology Institute (TOI), a U.S.-based cancer treatment provider, disclosed that patient data was compromised in a 2025 cybersecurity incident involving a third-party software vendor.
The disruption is felt across the environment, affecting Fee-for-service collections systems, patient information systems, and exposing Patient data.
In response, and began remediation that includes Collaboration with vendor to provide credit monitoring and protection for impacted patients, and stakeholders are being briefed through SEC filing, public disclosure.
The case underscores how Ongoing, with advisories going out to stakeholders covering Credit monitoring and protection for impacted patients.
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 Supply Chain Compromise (T1195) with high confidence (90%), supported by evidence indicating patient data was compromised in a 2025 cybersecurity incident involving a third-party software vendor and Compromise Software Supply Chain (T1195.002) with moderate to high confidence (80%), with evidence including third-party software vendor, and kroll, the vendor’s third-party administrator. Under the Credential Access tactic, the analysis identified Steal Application Access Token (T1528) with moderate confidence (60%), with evidence including third-party vendor breach, and accessed systems containing patient information. Under the Collection tactic, the analysis identified Data from Local System (T1005) with moderate to high confidence (80%), with evidence including patient data was compromised, and systems containing patient information and Data from Information Repositories (T1213) with moderate to high confidence (70%), with evidence including healthcare data was exposed, and fee-for-service collections systems affected. Under the Exfiltration tactic, the analysis identified Exfiltration Over C2 Channel (T1041) with moderate to high confidence (70%), supported by evidence indicating threat actors accessed systems containing patient information and Transfer Data to Cloud Account (T1537) with moderate confidence (50%), with evidence including third-party vendor involvement, and data breach via vendor systems. Under the Impact tactic, the analysis identified Defacement (T1491) with lower confidence (40%), supported by evidence indicating disruption in fee-for-service collections and Data Manipulation: Transmitted Data Manipulation (T1565.002) with moderate confidence (50%), supported by evidence indicating disruption in fee-for-service collections systems. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.
Sources & References
- Kroll Cyber and Data Resilience Rankiteo Cyber Incident Details: https://www.rankiteo.com/company/kroll-cyber/incident/ONCKRO1779972089
- Kroll Cyber and Data Resilience CyberSecurity Rating page: https://www.rankiteo.com/company/kroll-cyber
- Kroll Cyber and Data Resilience Rankiteo Cyber Incident Blog Article: https://blog.rankiteo.com/onckro1779972089-kroll-the-oncology-institute-breach-january-2025/
- Kroll Cyber and Data Resilience CyberSecurity Score History: https://www.rankiteo.com/company/kroll-cyber/history
- Kroll Cyber and Data Resilience CyberSecurity Incident Source: https://www.teiss.co.uk/news/oncology-institute-says-third-party-vendor-breach-compromised-patient-data-17561
- 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