1. Selecting a CTI service vendor is a critical step in establishing CTI service in any organization. Name and comments critical factors of selecting the most effective vendor. Outline the process of selecting a vendor.

2. Tools and standards in data formatting are important to implement effective information sharing process. Name a few popular standards and comment on their capabilities. Indicate gaps across the standards that needs to be taken into account.

3. MITRE ATT&CK Framework is capable to generate so called Behavioral IOC. Explain what is meant by this kind of IOC. Explain how they are pertinent to a post-compromised stage and what is the specific value of IOCs collected at a post-compromised stage.