Conifer Health Solutions Breach Incident Score: Analysis & Impact (CONCON1766160151)

In this Rankiteo incident briefing, we review the Conifer Health Solutions breach identified under incident ID CONCON1766160151.

The analysis begins with a detailed overview of Conifer Health Solutions's information like the linkedin page: https://www.linkedin.com/company/conifer-health-solutions, the number of followers: 91935, the industry type: Hospitals and Health Care and the number of employees: 7666 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 723 and after the incident was 670 with a difference of -53 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 Conifer Health Solutions and their customers.

On 18 December 2025, Conifer Value-Based Care, LLC disclosed Data Breach issues under the banner "Conifer Value-Based Care Business Email Compromise and Data Breach".

Conifer Value-Based Care, LLC discovered that an unauthorized third party had gained access to an employee’s Microsoft Office 365-hosted business email account, exposing personally identifiable information (PII) and protected health information of pediatric patients, their par...

The disruption is felt across the environment, affecting Microsoft Office 365-hosted business email account, and exposing Personally identifiable information (PII) and protected health information (PHI).

In response, teams activated the incident response plan, moved swiftly to contain the threat with measures like Immediate containment of the threat, and began remediation that includes Enhanced security controls and monitoring practices, while recovery efforts such as Completion of investigation and notification process continue, and stakeholders are being briefed through Notification to affected providers, health plans, and individuals; posting of Notice of Data Breach on dedicated website.

The case underscores how Completed (2025-11-10), teams are taking away lessons such as Importance of securing business email accounts and enhancing monitoring practices to prevent unauthorized access, and recommending next steps like Sign up for free IDX identity theft protection services, Monitor credit reports and financial accounts for unusual activity and Be alert for phishing emails or phone calls, with advisories going out to stakeholders covering Notification to affected providers and health plans (2025-11-14).

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 Phishing: Spearphishing Link (T1566.002) with moderate to high confidence (80%), supported by evidence indicating unauthorized access to an employee’s Microsoft Office 365-hosted business email account and Valid Accounts: Cloud Accounts (T1078.004) with moderate to high confidence (70%), supported by evidence indicating business Email Compromise (BEC) via Office 365 email account. Under the Credential Access tactic, the analysis identified Brute Force: Password Guessing (T1110.001) with moderate confidence (60%), supported by evidence indicating unauthorized access to an employee’s business email account (implied) and Unsecured Credentials: Cloud Credentials (T1552.006) with moderate to high confidence (70%), supported by evidence indicating exploitation of Office 365-hosted email account. Under the Collection tactic, the analysis identified Email Collection: Remote Email Collection (T1114.002) with high confidence (90%), supported by evidence indicating exposed PII/PHI in compromised email account; isolated to email. Under the Exfiltration tactic, the analysis identified Exfiltration Over Alternative Protocol: Exfiltration Over Unencrypted/Obfuscated Non-C2 Protocol (T1048.003) with moderate to high confidence (70%), supported by evidence indicating data breach involving PII/PHI; no evidence of encryption. Under the Impact tactic, the analysis identified Data Manipulation: Stored Data Manipulation (T1565.001) with moderate confidence (50%), supported by evidence indicating exposure of sensitive pediatric patient data (implied risk) and Data Destruction (T1485) with lower confidence (30%), supported by evidence indicating no evidence of misuse, but high-risk data exposed. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.