Exam 312-85 topic 1 question 41 discussion

Alice, a threat intelligence analyst at HiTech Cyber Solutions, wants to gather information for identifying emerging threats to the organization and implement essential techniques to prevent their systems and networks from such attacks. Alice is searching for online sources to obtain information such as the method used to launch an attack, and techniques and tools used to perform an attack and the procedures followed for covering the tracks after an attack.
Which of the following online sources should Alice use to gather such information?