Devereux Breach Incident Score: Analysis & Impact (DEV1768259961)

In this Rankiteo incident briefing, we review the Devereux breach identified under incident ID DEV1768259961.

The analysis begins with a detailed overview of Devereux's information like the linkedin page: https://www.linkedin.com/company/devereux, the number of followers: 24417, the industry type: Mental Health Care and the number of employees: 3869 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 765 and after the incident was 649 with a difference of -116 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 Devereux and their customers.

On 28 November 2025, The Devereux Foundation disclosed Ransomware issues under the banner "Devereux Foundation Ransomware Attack".

The Devereux Foundation, a national behavioral healthcare nonprofit, discovered suspicious activity within its electronic systems on Nov.

The disruption is felt across the environment, affecting Electronic systems, and exposing Sensitive organizational data, including names, demographic details, clinical information, and financial information.

In response, teams activated the incident response plan, moved swiftly to contain the threat with measures like Isolation of affected systems, and began remediation that includes Investigation and restoration of services, while recovery efforts such as Securely restoring full functionality continue, and stakeholders are being briefed through Notifying affected individuals, providing credit monitoring services, and setting up a dedicated call center.

The case underscores how Ongoing, with advisories going out to stakeholders covering Encouraging affected individuals to review account statements, monitor credit reports, and consider fraud alerts or credit freezes.

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 Exploit Public-Facing Application (T1190) with moderate confidence (50%), supported by evidence indicating detected unusual activity in its electronic systems and Valid Accounts (T1078) with moderate confidence (60%), supported by evidence indicating sensitive organizational data...obtained (implies account compromise). Under the Execution tactic, the analysis identified User Execution: Malicious File (T1204.002) with moderate to high confidence (70%), supported by evidence indicating ransomware group *The Gentlemen* claimed responsibility. Under the Credential Access tactic, the analysis identified OS Credential Dumping (T1003) with moderate confidence (60%), supported by evidence indicating names, demographic details, clinical records compromised and Unsecured Credentials: Credentials In Files (T1552.001) with moderate confidence (50%), supported by evidence indicating financial information exposed (implies credential exposure). Under the Collection tactic, the analysis identified Data from Local System (T1005) with moderate to high confidence (80%), supported by evidence indicating sensitive data exfiltrated (names, clinical, financial records). Under the Exfiltration tactic, the analysis identified Exfiltration Over C2 Channel (T1041) with high confidence (90%), supported by evidence indicating threatened to publish stolen data on dark web forum. Under the Impact tactic, the analysis identified Data Encrypted for Impact (T1486) with moderate to high confidence (70%), supported by evidence indicating ransomware attack (implies data encryption) and Inhibit System Recovery (T1490) with moderate confidence (60%), supported by evidence indicating isolated affected systems (implies disruption). Under the Defense Evasion tactic, the analysis identified Obfuscated Files or Information (T1027) with moderate confidence (50%), supported by evidence indicating ransomware group claimed responsibility (implies evasion). These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.