You are a newly-hired threat hunter and are familiarizing yourself with your organization’s network. You must establish a baseline of normal behavior before threat hunting can begin. Which tool would be the most helpful for this purpose?

To establish a baseline of normal behavior in your organization’s network, a tool like “Cisco SIEM” (Security Information and Event Management) would be the most helpful.

SIEM systems are designed to aggregate and analyze data from various sources across the network, including logs from firewalls, network devices, servers, and other critical infrastructure. By correlating and analyzing this data, a SIEM can help you understand normal network patterns and behaviors. This understanding is crucial for baseline establishment, enabling you to later identify deviations or anomalies that could indicate threats.

While the other tools mentioned are useful in their respective areas, they might not be as comprehensive as a SIEM for the specific task of establishing a network behavior baseline:

• Cisco Secure Firewall and Cisco Secure Network Analytics are great for monitoring and analyzing network traffic and threats but might not offer the same level of log aggregation and correlation as a SIEM.
• Cisco Umbrella DNS services provide DNS-layer security and are effective for identifying and blocking malicious DNS requests but do not encompass the broader scope of network behavior analysis that a SIEM provides.