The Certified Ethical Hacker (CEH) Malware Threats module explains that modern malware increasingly uses fileless techniques and living-off-the-land strategies, communicating over legitimate protocols like HTTP and DNS to evade detection.

Because this traffic blends with normal activity, port-based blocking and signature-based antivirus are often ineffective. CEH highlights behavioral analytics and network traffic analysis as the most reliable detection mechanisms for identifying anomalies such as:

Unusual outbound DNS queries

Abnormal HTTP beaconing patterns

Suspicious process behavior

Option C is correct because it focuses on detecting behavioral anomalies, which CEH identifies as essential for combating advanced malware and command-and-control (C2) channels.

Option D may disrupt business operations and does not address DNS-based C2.

Option A is outdated.

Option B cannot detect unknown or fileless malware.

CEH strongly recommends anomaly detection and behavioral monitoring for advanced threats.