Botnet Protection targets command-and-control behavior, including known C2 destinations, suspicious command traffic, and unknown C2 patterns detected through analytics or AI/ML. IPS and YARA-style content analysis are used to identify C2-like traffic and malicious patterns, not general malware categories alone. Option B (Connections to known C & C servers, Command traffic (sending / receiving), Unknown C & C using AI/ML) is correct because Command and Control traffic is the botnet behavior being protected against.
Why the other options are incorrect:
A. Malicious file downloads, Command traffic (sending / receiving), Data exfiltration: Malicious-file downloads and data exfiltration are important protections, but Botnet Protection specifically focuses on C2 destinations and command traffic.
C. Connections to known C & C servers, Detection of phishing sites, Access to spam sites: Phishing starts with social engineering: fake messages, links, or login pages. The question describes a legitimate common website being seeded with malicious JavaScript.
D. Vulnerabilities in web server applications, Unknown C & C using AI/ML, Vulnerable ActiveX controls: C2/botnet controls detect hosts communicating with known or suspected command-and-control infrastructure.