Cloud computing stands as a dynamic domain within technology and research, facilitating organizational decision-making and aiding individuals in problem-solving by linking one or more data centers installed in the premises of the cloud service providers for data exchange between clients and servers. In today’s environments, many organizations and individuals are now relying on cloud computing for storing and processing data in the cloud landscape, which has quadrupled the risk and potential threat of data security in organizations. This paper not only explores ATAC: Analysis of Threats and Attacks in Cloud Computing but also provides an in-depth examination of two major attacks: Account Hijacking and User Account Compromise, demonstrating their simulations using CloudSim.