Which Trojan family uses vulnerable service protocols such as VNC, HTTP/HTTPS, and ICMP to attack the victim's machine?

• A. VNC Trojan
• B. HTTP RAT
• C. Service Protocol Trojans
• D. ICMP Trojans

Answer: (C)

Service Protocol Trojans are defined by their use of standard network service channels to reach, control, or exfiltrate from a victim machine. They exploit vulnerabilities or misconfigurations in commonly exposed services and transport their payloads or commands over those protocols. The example protocols—VNC, HTTP/HTTPS, and ICMP—represent a range of everyday services an attacker can abuse to establish covert communication or remote control. Because this Trojan family centers on leveraging multiple service protocols rather than a single one, it best fits a category that encompasses using vulnerable protocols like these to attack or manage the compromised host. Narrower options that name a single protocol describe specific variants, but they don’t capture the multi-protocol approach described in the question.