How do you verify that one of your hosts is potentially compromised based on their communication destinations?

Cisco Talos maintains a continuously updated threat intelligence database of malicious IP addresses and domains. Searching a suspected host's communication destinations against Talos directly reveals whether it is contacting known command-and-control servers or other threat infrastructure, which is a primary indicator of compromise.

Traffic volume analysis identifies bandwidth anomalies but does not reveal whether the communication destinations are known malicious endpoints.

Stealthwatch alarms are focused on internal network behavioral anomalies and lateral movement, not on evaluating the reputation of external communication destinations.

Firepower inspects files transiting the network for malware signatures but does not assess whether the IP addresses or domains a host is communicating with are malicious.