Incident Score: Analysis & Impact (UNICHA1768835481)
The details regarding individual company incidents & reports gives you full view from every side.
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 UNICHA1768835481.
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 620 and after the incident was 385 with a difference of -235 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 targeted Change Healthcare, a key subsidiary of UnitedHealth Group (UHG), on February 21, 2024, crippling critical payment and claims processing systems across the U.S.
The disruption is felt across the environment, affecting Payment and claims processing systems, and exposing Patient records and financial information, with nearly Millions records at risk.
In response, teams activated the incident response plan, moved swiftly to contain the threat with measures like Isolated affected systems, while recovery efforts such as Partial restoration beginning in early March continue.
The case underscores how Ongoing.
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 to high confidence (80%), supported by evidence indicating exploited vulnerabilities in Change Healthcare’s IT infrastructure. Under the Execution tactic, the analysis identified Exploitation for Client Execution (T1203) with moderate to high confidence (70%), supported by evidence indicating ransomware attack targeted Change Healthcare on February 21, 2024. Under the Persistence tactic, the analysis identified Valid Accounts (T1078) with moderate confidence (60%), supported by evidence indicating crippling critical payment and claims processing systems (implied access). Under the Privilege Escalation tactic, the analysis identified Exploitation for Privilege Escalation (T1068) with moderate to high confidence (70%), supported by evidence indicating vulnerabilities in IT infrastructure exploited for ransomware deployment. Under the Defense Evasion tactic, the analysis identified Execution Guardrails (T1480) with moderate confidence (60%), supported by evidence indicating ransomware attack attributed to BlackCat/ALPHV (known evasion tactics) and Obfuscated Files or Information (T1027) with moderate to high confidence (70%), supported by evidence indicating data encryption and exfiltration by ransomware group. Under the Credential Access tactic, the analysis identified Adversary-in-the-Middle (T1557) with moderate confidence (50%), supported by evidence indicating access to payment/claims systems implies credential compromise. Under the Discovery tactic, the analysis identified Account Discovery (T1087) with moderate confidence (60%), supported by evidence indicating targeted healthcare systems with sensitive data (implied reconnaissance). Under the Lateral Movement tactic, the analysis identified Exploitation of Remote Services (T1210) with moderate to high confidence (70%), supported by evidence indicating widespread disruptions across U.S. healthcare sector (implied lateral spread). Under the Collection tactic, the analysis identified Data from Local System (T1005) with high confidence (90%), supported by evidence indicating patient records and financial information compromised. Under the Command and Control tactic, the analysis identified Application Layer Protocol (T1071) with moderate to high confidence (80%), supported by evidence indicating blackCat/ALPHV ransomware group (known C2 infrastructure). Under the Exfiltration tactic, the analysis identified Exfiltration Over C2 Channel (T1041) with high confidence (90%), supported by evidence indicating data exfiltration confirmed; data surfacing on dark web forums. Under the Impact tactic, the analysis identified Data Encrypted for Impact (T1486) with high confidence (90%), supported by evidence indicating systems encrypted;ransomware strain such as BlackCat/ALPHV, Defacement (T1491) with moderate confidence (50%), supported by evidence indicating disruptions delayed prescriptions, billing, and reimbursements, and Endpoint Denial of Service (T1499) with moderate to high confidence (80%), supported by evidence indicating crippling critical payment and claims processing systems. 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/UNICHA1768835481
- UnitedHealth Group CyberSecurity Rating page: https://www.rankiteo.com/company/unitedhealth-group
- UnitedHealth Group Rankiteo Cyber Incident Blog Article: https://blog.rankiteo.com/unicha1768835481-unitedhealth-group-change-healthcare-cyber-attack-february-2024/
- UnitedHealth Group CyberSecurity Score History: https://www.rankiteo.com/company/unitedhealth-group/history
- UnitedHealth Group CyberSecurity Incident Source: https://www.wnep.com/article/news/local/lycoming-county/lycoming-county-investigating-ransomware-attack-cyber-criminals-department-of-public-safety/523-ef5b7ba5-3741-45e4-84f3-57cd460ca43a
- 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