Based on the Attacks Risk Report, DNS is associated with a high number of impact events (16). DNS traffic is critical for network operations but can also be exploited for malicious activities such as DNS tunneling, DDoS attacks, and data exfiltration. To improve security, the security engineer should focus on inspecting DNS traffic. This involves deploying DNS security solutions and monitoring DNS traffic for anomalies to detect and mitigate potential threats.

Steps:

Implement DNS security tools such as DNS filtering, DNSSEC, and DNS anomaly detection.

Configure the firewall to inspect DNS traffic for malicious activities.

Regularly analyze DNS logs to identify and respond to threats.

This action addresses a significant risk identified in the report and helps to mitigate potential attacks exploiting DNS.

Change Reconciliation records snapshots whenever users save system-configuration changes and combines those snapshots into a detailed report covering the previous 24 hours. Under System > Configuration > Change Reconciliation, the administrator enables the feature, selects the daily execution time, and specifies management’s recipient email addresses. The administrator can also include policy-configuration changes and enable the full change history instead of receiving only a consolidated view. An email relay host must be configured so that Management Center can deliver the report. Sending audit logs to an HTTP or syslog server streams audit events to an external collector; it does not generate the required daily email summary. STIG Compliance applies security-hardening settings and is unrelated to scheduled change reporting. Cisco Change Reconciliation documentation

Disseminate: The dissemination phase publishes the results of the investigation or threat hunt. This information is disseminated with a focus on the receivers of the information. At the tactical level, this information feeds back into the beginning of the F3EAD model, Find. Figure 3 illustrates the F3EAD model.