What type of intelligence source should a security analyst review to understand potential attacks on executives?

The correct choice involves leveraging the resources and insights offered by industry information-sharing and collaboration groups. These groups typically consist of professionals from various organizations who share knowledge regarding security threats, attack patterns, and vulnerabilities that are particularly relevant to specific sectors or roles, such as executives in this case.

Security executives are often targeted due to their access to sensitive information and their decision-making power within an organization, making it crucial for security analysts to stay informed about the tactics, techniques, and procedures (TTPs) that attackers might use to exploit these high-value targets. By participating in or reviewing information from these collaboration groups, analysts can gain a broader perspective on emerging threats, understand the context of potential attacks on executives, and develop appropriate defenses.

Considering the other options, while vulnerability feeds provide information about known vulnerabilities that could be exploited, they do not specifically address the types of targeted attacks that may be aimed at executives. Trusted automated exchanges of indicator information are useful for real-time sharing of threat indicators, but they may lack the strategic insights found in collaboration groups. Finally, structured threat information expression (STIX) is a standardized format for sharing cyber threat intelligence, but it also does not focus specifically on the patterns of attacks targeted at executives.