A system for malicious code detection includes a front-end processor, multiple scanning computer systems, and a detection management system. During operation, the multiple scanning computer systems scan content for malicious code and generate an alarm when the content contains malicious code. The front-end processor receives a flow of content from an external network and distributes copies of the flow to each of the multiple scanning computer systems in parallel for scanning. The detection management system employs a countermeasure on the flow if at least one of the scanning computer systems generates the alarm.