Kettering Health Breach Incident Score: Analysis & Impact (KET5372653112625)

In this Rankiteo incident briefing, we review the Kettering Health breach identified under incident ID KET5372653112625.

The analysis begins with a detailed overview of Kettering Health's information like the linkedin page: https://www.linkedin.com/company/ketteringhealth, the number of followers: 37866, the industry type: Hospitals and Health Care and the number of employees: 8058 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 697 and after the incident was 575 with a difference of -122 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 Kettering Health and their customers.

On 21 May 2025, Kettering Health disclosed ransomware, data breach and cyberattack issues under the banner "Ransomware Attack on Kettering Health Disrupts Patient Care Systems".

Kettering Health, a major hospital network operating 14 medical centers across Ohio, confirmed it has fallen victim to a ransomware attack by the Interlock ransomware group.

The disruption is felt across the environment, affecting electronic health records (EHR), patient care systems and payment systems, and exposing True.

In response, teams activated the incident response plan, moved swiftly to contain the threat with measures like downtime procedures, suspension of payment-related calls and patient advisories on scam calls, and began remediation that includes system restoration in progress, and stakeholders are being briefed through public announcement, coordination with regional healthcare associations (e.g., Greater Dayton Area Hospital Association) and patient advisories on credit monitoring.

The case underscores how ongoing (system restoration and forensic analysis in progress), with advisories going out to stakeholders covering Greater Dayton Area Hospital Association, Premier Health (code yellow declaration) and Greater Miami Valley EMS Council.

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: Cloud Accounts (T1078.004) with moderate to high confidence (70%), supported by evidence indicating remote Desktop Protocol (RDP) used for unauthorized network access and Phishing: Spearphishing Link (T1566.002) with moderate to high confidence (80%), supported by evidence indicating social engineering (ClickFix technique) listed as attack vector. Under the Execution tactic, the analysis identified Command and Scripting Interpreter: PowerShell (T1059.001) with high confidence (90%), supported by evidence indicating malicious PowerShell commands listed as attack vector and Rundll32 (T1085) with high confidence (95%), supported by evidence indicating rundll32.exe execution and malicious DLLs mentioned. Under the Persistence tactic, the analysis identified Remote Desktop Protocol (T1076) with high confidence (90%), supported by evidence indicating lateral movement via RDP and persistent access implied. Under the Privilege Escalation tactic, the analysis identified Process Injection (T1055) with moderate to high confidence (80%), supported by evidence indicating rundll32.exe execution suggests DLL injection for escalation. Under the Defense Evasion tactic, the analysis identified Indicator Removal: File Deletion (T1070.004) with moderate to high confidence (75%), supported by evidence indicating ransomware typically deletes logs; implied by comprehensive IT failure and Obfuscated Files or Information (T1027) with moderate to high confidence (80%), supported by evidence indicating malicious DLLs and PowerShell commands often obfuscated. Under the Credential Access tactic, the analysis identified OS Credential Dumping (T1003) with moderate to high confidence (85%), supported by evidence indicating lateral movement via RDP suggests credential theft/dumping. Under the Discovery tactic, the analysis identified System Information Discovery (T1082) with moderate to high confidence (80%), supported by evidence indicating targeting patient data and payment systems implies network reconnaissance. Under the Lateral Movement tactic, the analysis identified Remote Services: Remote Desktop Protocol (T1021.001) with high confidence (95%), supported by evidence indicating lateral movement via RDP explicitly stated. Under the Collection tactic, the analysis identified Data from Local System (T1005) with high confidence (90%), supported by evidence indicating patient data (potential) and payment information targeted for exfiltration. 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 (85%), supported by evidence indicating data exfiltration confirmed; scam calls suggest stolen data used externally. Under the Impact tactic, the analysis identified Data Encrypted for Impact (T1486) with high confidence (100%), supported by evidence indicating data encryption and ransomware attack explicitly confirmed, Data Destruction (T1485) with moderate to high confidence (70%), supported by evidence indicating comprehensive IT failure suggests potential data destruction, and Endpoint Denial of Service: Application or System Exploitation (T1499.004) with high confidence (90%), supported by evidence indicating disruption of patient care systems and cancellation of elective procedures. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.