St. John's Riverside Hospital Breach Incident Score: Analysis & Impact (ST.1767031285)

In this Rankiteo incident briefing, we review the St. John's Riverside Hospital breach identified under incident ID ST.1767031285.

The analysis begins with a detailed overview of St. John's Riverside Hospital's information like the linkedin page: https://www.linkedin.com/company/st.-john's-riverside-hospital, the number of followers: 7343, the industry type: Hospitals and Health Care and the number of employees: 1206 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 766 and after the incident was 691 with a difference of -75 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 St. John's Riverside Hospital and their customers.

On 14 November 2025, St. John’s Riverside Hospital disclosed Data Breach issues under the banner "St. John’s Riverside Hospital Data Breach".

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The disruption is felt across the environment, affecting Employee email accounts, and exposing PII and PHI, with nearly 2238 records at risk.

In response, teams activated the incident response plan, moved swiftly to contain the threat with measures like Password changes, Session token revocation and Multifactor authentication reset, and began remediation that includes Unauthorized activity contained and remediated, and stakeholders are being briefed through Official notice to consumers.

The case underscores how Completed, with advisories going out to stakeholders covering If you believe your personal information may have been compromised in this breach, please take appropriate steps to protect your information.

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 (T1566) with high confidence (95%), with evidence including phishing emails and an attempt to reroute payment funds, and attack vector such as Phishing and Valid Accounts: Local Accounts (T1078.003) with high confidence (90%), supported by evidence indicating unauthorized access to a limited number of employee email accounts. Under the Credential Access tactic, the analysis identified Brute Force: Password Guessing (T1110.001) with moderate to high confidence (70%), supported by evidence indicating password changes as containment measure and Unsecured Credentials: Email Account (T1552.007) with moderate to high confidence (80%), supported by evidence indicating unauthorized access to employee email accounts. Under the Collection tactic, the analysis identified Email Collection: Remote Email Collection (T1114.002) with high confidence (90%), supported by evidence indicating compromised accounts contained sensitive data (PII/PHI). Under the Exfiltration tactic, the analysis identified Exfiltration Over Alternative Protocol (T1048) with moderate to high confidence (70%), supported by evidence indicating pII and PHI exposed with no encryption mentioned. Under the Defense Evasion tactic, the analysis identified Impair Defenses: Disable or Modify Tools (T1562.001) with moderate confidence (60%), supported by evidence indicating suspicious activity detected post-compromise. Under the Impact tactic, the analysis identified Data Encrypted for Impact (T1486) with lower confidence (30%), supported by evidence indicating no ransomware mentioned, but data breach implies impact and Data Manipulation: Stored Data Manipulation (T1565.001) with moderate confidence (50%), supported by evidence indicating attempt to reroute payment funds. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.