A complicated persistent threat (APT) is a complicated, sustained cyberattack by which an intruder establishes an undetected existence within a network to be able to steal delicate details about a protracted stretch of time. IT security, However, is restricted to preserving information as well as other assets only in a https://www.researchgate.net/publication/365308473_Development_of_Cyber_Attack_Model_for_Private_Network