Incident Score: Analysis & Impact (MICCOM1786570654)
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Rankiteo Score Impact Analysis
Key Highlights From The Incident Analysis
- Timeline of CommonSpirit Health's Ransomware and lateral movement inside company's environment.
- Overview of affected data sets, including SSNs and PHI, and why they materially increase incident severity.
- How Rankiteo’s incident engine converts technical details into a normalized incident score.
- How this cyber incident impacts CommonSpirit Health Rankiteo cyber scoring and cyber rating.
- Rankiteo’s MITRE ATT&CK correlation analysis for this incident, with associated confidence level.
Full Incident Analysis Transcript
In this Rankiteo incident briefing, we review the CommonSpirit Health breach identified under incident ID MICCOM1786570654.
The analysis begins with a detailed overview of CommonSpirit Health's information like the linkedin page: https://www.linkedin.com/company/commonspirithealth, the number of followers: 163602, the industry type: Hospitals and Health Care and the number of employees: 48010 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 719 and after the incident was 627 with a difference of -92 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 CommonSpirit Health and their customers.
On 30 July 2026, CommonSpirit Health disclosed Ransomware issues under the banner "MicroCode Software Services Discloses Ransomware Breach Affecting CommonSpirit Health Data".
MicroCode Software Services Inc., an IT vendor for CommonSpirit Health, reported a data breach stemming from a ransomware attack that exposed sensitive medical malpractice insurance records.
The disruption is felt across the environment, affecting Server hosting CommonSpirit Health’s database, and exposing Personally identifiable information (PII), medical malpractice insurance records, with nearly 4,096 records at risk.
In response, and began remediation that includes Notification letters mailed to affected individuals, credit monitoring and fraud protection resources provided, and stakeholders are being briefed through Public disclosure to Washington Attorney General, notification letters to affected individuals.
The case underscores how Completed (forensic investigation concluded), teams are taking away lessons such as Highlights ongoing risks in third-party vendor security within the healthcare sector, with advisories going out to stakeholders covering Notification letters with credit monitoring and fraud protection resources.
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.
MITRE ATT&CK® Correlation Analysis
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 unauthorized access to MicroCode’s server hosting CommonSpirit Health’s database and External Remote Services (T1133) with moderate confidence (60%), supported by evidence indicating server hosting CommonSpirit Health’s database accessed between Jan 19-Apr 14, 2026. Under the Persistence tactic, the analysis identified Account Manipulation (T1098) with lower confidence (40%), supported by evidence indicating unauthorized access persisted from Jan 19 to Apr 14, 2026. Under the Privilege Escalation tactic, the analysis identified Exploitation for Privilege Escalation (T1068) with moderate confidence (50%), supported by evidence indicating access to server hosting sensitive medical malpractice insurance records. Under the Defense Evasion tactic, the analysis identified Obfuscated Files or Information (T1027) with moderate to high confidence (70%), supported by evidence indicating ransomware attack on April 14, 2026, compromised the system and Data Encrypted for Impact (T1486) with high confidence (90%), supported by evidence indicating data encryption confirmed in ransomware attack. Under the Credential Access tactic, the analysis identified Adversary-in-the-Middle (T1557) with lower confidence (40%), supported by evidence indicating unauthorized access to server hosting sensitive records. Under the Discovery tactic, the analysis identified Account Discovery (T1087) with moderate confidence (60%), supported by evidence indicating names and dates of birth exposed in breach and File and Directory Discovery (T1083) with moderate to high confidence (70%), supported by evidence indicating medical malpractice insurance records compromised. Under the Collection tactic, the analysis identified Data from Local System (T1005) with moderate to high confidence (80%), supported by evidence indicating pII including names and dates of birth exposed. Under the Impact tactic, the analysis identified Data Encrypted for Impact (T1486) with high confidence (90%), supported by evidence indicating ransomware attack encrypted data on April 14, 2026. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.
Sources & References
- CommonSpirit Health Rankiteo Cyber Incident Details: https://www.rankiteo.com/company/commonspirithealth/incident/MICCOM1786570654
- CommonSpirit Health CyberSecurity Rating page: https://www.rankiteo.com/company/commonspirithealth
- CommonSpirit Health Rankiteo Cyber Incident Blog Article: https://blog.rankiteo.com/miccom1786570654-microcode-software-services-inc-commonspirit-health-ransomware-january-2026/
- CommonSpirit Health CyberSecurity Score History: https://www.rankiteo.com/company/commonspirithealth/history
- CommonSpirit Health CyberSecurity Incident Source: https://www.claimdepot.com/data-breach/commonspirit-health-2026-95150
- Rankiteo A.I CyberSecurity Rating methodology: https://www.rankiteo.com/Images/rankiteo_algo.pdf
- Rankiteo TPRM Scoring methodology: https://static.rankiteo.com/model/rankiteo_tprm_methodology.pdf