Three reasons that ATP's pose greatest CYBINT threat to nation-state and commercial targets are financial advantage, intelligence gathering, competitive advantage for industry.
Explanation:
An advanced persistent threat (APT) is a prolonged and targeted cyber attack in which an intruder gains access to a network and remains undetected for an period of time. The intention of an APT attack is usually to monitor network activity and steal data rather than to cause damage to the network or organization.
There are some reasons because of which these advanced persistent threat pose threat to nation state and the commercial targets. Those reasons are financial advantage, competitive advantage for the industry which is effective and helps to gain more profit and income over the other.