A Multi-Layer Threat Intelligence Framework for Real- Time Web Security with Splunk Enterprise Integration

The evolving sophistication of web-based cyber threats necessitates innovative security approaches that operate at the browser level while maintaining seamless integration with enterprise security infrastructure. This research presents WebShield Pro, an intelligent browser extension framework that combines real-time threat intelligence, behavioral analysis, and machine learning-powered detection capabilities with enterprise Security Information and Event Management (SIEM) systems. The proposed architecture creates a bidirectional security ecosystem where client-side threat detection enhances organizational visibility while centralized threat intelligence strengthens individual user protection. WebShield Pro employs a multilayered detection approach integrating URL reputation analysis, Document Object Model (DOM) structural examination, JavaScript behavior monitoring, and heuristic pattern recognition to identify sophisticated phishing campaigns, malicious website exploitation, and zero-day browser-based attacks. Through Splunk HTTP Event Collector (HEC) integration, the framework transmits structured security telemetry to centralized monitoring platforms, enabling correlation analysis, threat hunting, and automated incident response. Comprehensive evaluation across 850 enterprise endpoints over eight months demonstrated 96.3% accuracy in malicious website detection, 73% reduction in mean time to threat identification, and 58% improvement in security analyst response efficiency. The system successfully identified 127 previously undetected phishing campaigns while maintaining a false positive rate below 1.8%. This research advances browser security methodology and establishes a blueprint for integrating client-side protection mechanisms with enterprise security operations.