SECURING NETWORKS AGAINST SPEAR PHISHING ATTACKS

The disclosed embodiments provide a system that secures a network. During operation, the system obtains a request for a resource from a client connected to the network. Next, the system uses a domain name from the request to obtain one or more properties associated with the domain name and assesses a level of risk associated with the domain name based on the one or more properties. Finally, the system processes the request based on the assessed level of risk.