Incident Score: Analysis & Impact (ANT1778581440)

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 Drive-by Compromise (T1189) with moderate confidence (60%), supported by evidence indicating malicious Chrome extensions...hijack Claude and exfiltrate sensitive data and Supply Chain Compromise: Compromise Software Dependencies and Development Tools (T1195.002) with lower confidence (40%), supported by evidence indicating flaw in Anthropic’s *Claude in Chrome* browser extension. Under the Execution tactic, the analysis identified User Execution: Malicious File (T1204.002) with moderate confidence (50%), supported by evidence indicating malicious Chrome extensions...inject scripts into the *claude.ai* context and Command and Scripting Interpreter: JavaScript (T1059.007) with moderate to high confidence (80%), supported by evidence indicating inject scripts into the *claude.ai* context and issue privileged commands. Under the Privilege Escalation tactic, the analysis identified Abuse Elevation Control Mechanism: Bypass User Account Control (T1548.002) with moderate to high confidence (70%), supported by evidence indicating bypassing confirmation dialogs through approval looping and Valid Accounts: Cloud Accounts (T1078.004) with moderate confidence (60%), supported by evidence indicating mimicking legitimate traffic using Claude’s public extension ID. Under the Defense Evasion tactic, the analysis identified Subvert Trust Controls: Code Signing (T1553.002) with moderate to high confidence (70%), supported by evidence indicating fails to verify the actual sender, enabling any extension to inject scripts, Masquerading: Match Legitimate Name or Location (T1036.005) with moderate to high confidence (80%), supported by evidence indicating mimicking legitimate traffic using Claude’s public extension ID, and Hide Artifacts: Hidden Window (T1564.003) with moderate confidence (60%), supported by evidence indicating manipulating the DOM to deceive Claude into performing malicious actions. Under the Collection tactic, the analysis identified Email Collection: Remote Email Collection (T1114.002) with high confidence (90%), supported by evidence indicating summarizing emails, forwarding them to an attacker, Data from Information Repositories: Sharepoint (T1213.002) with moderate to high confidence (80%), supported by evidence indicating exfiltrate sensitive data from Gmail, Google Drive, and GitHub, and Data from Local System (T1005) with moderate to high confidence (70%), supported by evidence indicating exfiltrate sensitive data from Gmail, Google Drive, and GitHub. Under the Exfiltration tactic, the analysis identified Exfiltration Over C2 Channel (T1041) with high confidence (90%), supported by evidence indicating exfiltrate sensitive data from Gmail, Google Drive, and GitHub and Exfiltration Over Web Service: Exfiltration to Cloud Storage (T1567.002) with moderate to high confidence (70%), supported by evidence indicating forwarding emails to an attacker. Under the Impact tactic, the analysis identified Data Destruction (T1485) with moderate confidence (60%), supported by evidence indicating deleting traces and Data Manipulation: Stored Data Manipulation (T1565.001) with moderate confidence (50%), supported by evidence indicating manipulating the DOM to deceive Claude into performing malicious actions. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.