Traditional security detection methods face three key challenges: inadequate data collection that misses critical security events, resource-intensive monitoring systems, and poor detection algorithms with high false positive rates. We present FEAD (Focus-Enhanced Attack Detection), a framework that addresses these issues through three innovations: (1) an attack model-driven approach that extracts security-critical monitoring items from online attack reports for comprehensive coverage; (2) efficient task decomposition that optimally distributes monitoring across existing collectors to minimize overhead; and (3) locality-aware anomaly analysis that leverages the clustering behavior of malicious activities in provenance graphs to improve detection accuracy. Evaluations demonstrate FEAD achieves 8.23% higher F1-score than existing solutions with only 5.4% overhead, confirming that focus-based designs significantly enhance detection performance.