Incident Score: Analysis & Impact (OUTEPIMICUMA1777660615)

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 Phishing: Spearphishing Link (T1566.002) with moderate confidence (60%), supported by evidence indicating fraudulent entities posed as legitimate healthcare providers, Valid Accounts: Cloud Accounts (T1078.004) with moderate to high confidence (80%), supported by evidence indicating exploiting a health information exchange via third-party companies, and Compromise Accounts (T1586) with moderate to high confidence (70%), supported by evidence indicating fake National Provider Identification (NPI) numbers to deceive systems. Under the Credential Access tactic, the analysis identified Gather Victim Identity Information: Credentials (T1589.001) with moderate to high confidence (70%), supported by evidence indicating fraudulent NPI numbers and shell companies used to access records and Forge Web Credentials: SAML Tokens (T1606.002) with moderate confidence (60%), supported by evidence indicating fake websites and shell companies to deceive healthcare systems. Under the Discovery tactic, the analysis identified Account Discovery: Local Account (T1087.001) with moderate to high confidence (70%), supported by evidence indicating unusual activity detected from third-party companies and Account Discovery: Cloud Account (T1087.004) with moderate to high confidence (80%), supported by evidence indicating exploitation of health information exchange systems. Under the Collection tactic, the analysis identified Data from Local System (T1005) with high confidence (90%), supported by evidence indicating demographic details, clinical info, health insurance records compromised and Data from Information Repositories: Sharepoint (T1213.002) with moderate to high confidence (70%), supported by evidence indicating access to Michigan Medicine’s electronic health records. Under the Exfiltration tactic, the analysis identified Exfiltration Over C2 Channel (T1041) with moderate to high confidence (80%), supported by evidence indicating 300,000 medical records compromised, potential sale to lawyers and Transfer Data to Cloud Account (T1537) with moderate confidence (60%), supported by evidence indicating monetized patient data without consent via Health Gorilla’s network. Under the Defense Evasion tactic, the analysis identified Hide Artifacts: Hidden Files and Directories (T1564.001) with moderate to high confidence (70%), supported by evidence indicating inserted false entries into medical records to mask activities and Masquerading: Task Masquerading (T1036.004) with moderate to high confidence (80%), supported by evidence indicating fraudulent entities posed as legitimate healthcare providers. Under the Impact tactic, the analysis identified Data Destruction (T1485) with moderate confidence (50%), supported by evidence indicating false entries inserted into medical records and Data Manipulation: Stored Data Manipulation (T1565.001) with moderate to high confidence (70%), supported by evidence indicating inserted false entries into medical records to mask activities. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.