Incident Score: Analysis & Impact (UNI1769031536)
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Rankiteo Score Impact Analysis
Key Highlights From The Incident Analysis
- Timeline of UnitedHealth Group's Cyber Attack 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 UnitedHealth Group 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 UnitedHealth Group breach identified under incident ID UNI1769031536.
The analysis begins with a detailed overview of UnitedHealth Group's information like the linkedin page: https://www.linkedin.com/company/unitedhealth-group, the number of followers: 1681191, the industry type: Hospitals and Health Care and the number of employees: 91204 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 629 and after the incident was 402 with a difference of -227 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 UnitedHealth Group and their customers.
On 21 February 2024, Change Healthcare disclosed Ransomware issues under the banner "Ransomware Attack on Change Healthcare Disrupts U.S. Healthcare Network".
A ransomware attack on Change Healthcare, a key subsidiary of UnitedHealth Group, has severely disrupted U.S.
The disruption is felt across the environment, affecting Prescription processing, insurance claims, payment systems, and exposing 6 terabytes of sensitive data.
In response, moved swiftly to contain the threat with measures like Systems taken offline, while recovery efforts such as Ongoing, full recovery uncertain continue.
The case underscores how Ongoing, with advisories going out to stakeholders covering Federal intervention urged.
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 attack on Change Healthcare, a key subsidiary with widespread systems and Valid Accounts (T1078) with moderate confidence (60%), supported by evidence indicating systems taken offline suggest possible compromised credentials. Under the Execution tactic, the analysis identified User Execution: Malicious File (T1204.002) with moderate to high confidence (70%), supported by evidence indicating ransomware attack attributed to BlackCat/ALPHV group. Under the Persistence tactic, the analysis identified Valid Accounts (T1078) with moderate confidence (60%), supported by evidence indicating systems taken offline imply prolonged unauthorized access. Under the Privilege Escalation tactic, the analysis identified Valid Accounts (T1078) with moderate confidence (60%), supported by evidence indicating compromised systems suggest escalated privileges. 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 by BlackCat/ALPHV known for evasion tactics and Impair Defenses: Disable or Modify Tools (T1562.001) with moderate to high confidence (80%), supported by evidence indicating systems taken offline to contain the attack. Under the Credential Access tactic, the analysis identified OS Credential Dumping (T1003) with moderate confidence (60%), supported by evidence indicating 6 terabytes of sensitive data exfiltrated, including billing info. Under the Discovery tactic, the analysis identified Account Discovery (T1087) with moderate confidence (60%), supported by evidence indicating patient records and billing information targeted and File and Directory Discovery (T1083) with moderate to high confidence (70%), supported by evidence indicating 6 terabytes of data exfiltrated, suggesting extensive discovery. Under the Collection tactic, the analysis identified Data from Local System (T1005) with high confidence (90%), supported by evidence indicating patient records, billing information, personal details compromised. Under the Command and Control tactic, the analysis identified Application Layer Protocol (T1071) with moderate to high confidence (70%), supported by evidence indicating ransomware group BlackCat/ALPHV likely used C2 channels. Under the Exfiltration tactic, the analysis identified Exfiltration Over C2 Channel (T1041) with high confidence (90%), supported by evidence indicating 6 terabytes of sensitive data allegedly stolen. Under the Impact tactic, the analysis identified Data Encrypted for Impact (T1486) with high confidence (90%), supported by evidence indicating ransomware attack with data encryption confirmed and Inhibit System Recovery (T1490) with moderate to high confidence (70%), supported by evidence indicating systems taken offline, full recovery uncertain. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.
Sources & References
- UnitedHealth Group Rankiteo Cyber Incident Details: https://www.rankiteo.com/company/unitedhealth-group/incident/UNI1769031536
- UnitedHealth Group CyberSecurity Rating page: https://www.rankiteo.com/company/unitedhealth-group
- UnitedHealth Group Rankiteo Cyber Incident Blog Article: https://blog.rankiteo.com/uni1769031536-unitedhealth-group-cyber-attack-february-2024/
- UnitedHealth Group CyberSecurity Score History: https://www.rankiteo.com/company/unitedhealth-group/history
- UnitedHealth Group CyberSecurity Incident Source: https://biz.chosun.com/en/en-industry/2026/01/22/L4M2SGNYPRDKJNFUBODHPEZIJY/
- 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