Which of the following types of threat attribution deals with the identification of the specific person, society, or a country sponsoring a well-planned and executed intrusion or attack over its target?

Tyrion, a professional hacker, is targeting an organization to steal confidential information. He wants to perform website footprinting to obtain the following information, which is hidden in the web page header.
Connection status and content type
Accept-ranges and last-modified information
X-powered-by information
Web server in use and its version
Which of the following tools should the Tyrion use to view header content?