Incident Score: Analysis & Impact (RET1783010603)
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Rankiteo Score Impact Analysis
Key Highlights From The Incident Analysis
- Timeline of Rethink's Ransomware 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 Rethink 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 Rethink breach identified under incident ID RET1783010603.
The analysis begins with a detailed overview of Rethink's information like the linkedin page: https://www.linkedin.com/company/rethink, the number of followers: 56066, the industry type: Advertising Services and the number of employees: 412 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 755 and after the incident was 601 with a difference of -154 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 Rethink and their customers.
On 25 September 2025, Medical Computer Business Services (MCBS) disclosed Data Breach, Ransomware issues under the banner "MCBS Data Breach Exposes Over 300,000 Patients’ Sensitive Information in Ransomware Attack".
Medical billing firm Medical Computer Business Services (MCBS) confirmed a September 2025 data breach affecting at least 309,309 individuals.
The disruption is felt across the environment, and exposing 3.3 TB, with nearly 309,309 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 Exploit Public-Facing Application (T1190) with moderate confidence (50%), supported by evidence indicating unauthorized access occurred between September 22 and 26, 2025 and Valid Accounts (T1078) with moderate confidence (60%), supported by evidence indicating network intrusions detected on September 25. Under the Credential Access tactic, the analysis identified Unsecured Credentials (T1552) with moderate to high confidence (70%), supported by evidence indicating social Security numbers, medical histories, health insurance info compromised and OS Credential Dumping (T1003) with moderate confidence (50%), supported by evidence indicating 3.3 TB of data stolen, including sensitive credentials. Under the Collection tactic, the analysis identified Data from Local System (T1005) with high confidence (90%), supported by evidence indicating names, SSNs, medical histories, treatment details compromised and Data from Information Repositories (T1213) with moderate to high confidence (80%), supported by evidence indicating 3.3 TB of data exfiltrated from billing systems. Under the Exfiltration tactic, the analysis identified Exfiltration Over C2 Channel (T1041) with moderate to high confidence (80%), supported by evidence indicating pEAR claimed responsibility for stealing 3.3 TB of data and Exfiltration Over Web Service (T1567) with moderate confidence (60%), supported by evidence indicating data extortion-focused ransomware group PEAR. Under the Impact tactic, the analysis identified Data Encrypted for Impact (T1471) with lower confidence (20%), supported by evidence indicating pEAR relies solely on threatening to leak stolen information and Defacement (T1491) with lower confidence (30%), supported by evidence indicating pEAR claimed attack publicly on September 30, 2025. Under the Defense Evasion tactic, the analysis identified Obfuscated Files or Information (T1027) with moderate confidence (50%), supported by evidence indicating attack vector and vulnerability exploited remain unknown and Hide Artifacts (T1564) with moderate confidence (60%), supported by evidence indicating unauthorized access occurred over 4 days before detection. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.
Sources & References
- Rethink Rankiteo Cyber Incident Details: https://www.rankiteo.com/company/rethink/incident/RET1783010603
- Rethink CyberSecurity Rating page: https://www.rankiteo.com/company/rethink
- Rethink Rankiteo Cyber Incident Blog Article: https://blog.rankiteo.com/ret1783010603-think-big-health-care-solutions-ransomware-september-2025/
- Rethink CyberSecurity Score History: https://www.rankiteo.com/company/rethink/history
- Rethink CyberSecurity Incident Source: https://www.comparitech.com/news/medical-billing-firm-mcbs-warns-300000-patients-of-data-breach/
- 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