Malicious GenAI Browser Extension C2 and PAC Redirection (via proxy)

ATT&CK techniques

Persistence → C2

Recon
Resource Dev
Initial Access
Execution
Persistence
- T1176Software Extensions
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
- T1071.001Web Protocols
- T1090Proxy
Exfiltration
Impact

What it detects

This rule detects web traffic to the command-and-control WebSocket endpoint, proxy auto-config file, and data-exfiltration API used by high-risk generative-AI browser extensions reported by Unit 42. These extensions hijack browser proxy settings and read user email and session data, exfiltrating it to attacker infrastructure.

Reporting behind it

Related detections9 linkedT1071.001 — drag to rearrange

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Malicious GenAI Browser Extension C2 and PAC Redirection (via proxy)

Pivot detection · T1071.001 · 9 related

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.

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