Denton County MHMR Center Breach Incident Score: Analysis & Impact (DEN1767633881)

In this Rankiteo incident briefing, we review the Denton County MHMR Center breach identified under incident ID DEN1767633881.

The analysis begins with a detailed overview of Denton County MHMR Center's information like the linkedin page: https://www.linkedin.com/company/dentonmhmr, the number of followers: 1922, the industry type: Mental Health Care and the number of employees: 290 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 757 and after the incident was 664 with a difference of -93 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 Denton County MHMR Center and their customers.

On 21 February 2025, Denton MHMR Center disclosed Data Breach issues under the banner "Denton MHMR Center Data Breach".

Denton MHMR Center reported a significant data breach involving unauthorized access to its systems, exposing sensitive personally identifiable information of 108,967 individuals.

The disruption is felt across the environment, affecting Denton MHMR Center's network systems, and exposing Sensitive personally identifiable information, with nearly 108,967 records at risk.

In response, and stakeholders are being briefed through Notice of Data Breach posted on website and reported to U.S. Department of Health and Human Services.

The case underscores how Ongoing, and recommending next steps like Enroll in free credit monitoring and identity protection services, Monitor financial statements for suspicious activity and Place a fraud alert and request credit reports from major credit bureaus, with advisories going out to stakeholders covering Notice of Data Breach posted on website on 2025-02-21 (Updated 2025-12-30).

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 Valid Accounts (T1078) with moderate to high confidence (70%), supported by evidence indicating unauthorized threat actor accessed the organization’s systems and Exploit Public-Facing Application (T1190) with moderate confidence (50%), supported by evidence indicating unusual network activity detected; attack vector unspecified. Under the Credential Access tactic, the analysis identified Unsecured Credentials (T1552) with moderate confidence (60%), supported by evidence indicating unauthorized access to systems with sensitive data. Under the Exfiltration tactic, the analysis identified Exfiltration Over C2 Channel (T1041) with moderate to high confidence (80%), supported by evidence indicating 108,967 records exposed; data exfiltration not explicitly denied and Automated Exfiltration (T1020) with moderate to high confidence (70%), supported by evidence indicating large volume of data compromised (108,967 individuals). Under the Impact tactic, the analysis identified Data Destruction (T1485) with lower confidence (30%), supported by evidence indicating no evidence of data destruction; included due to high-impact breach and Stored Data Manipulation (T1565.001) with lower confidence (40%), supported by evidence indicating sensitive diagnosis/treatment records compromised. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.