Cyber attacks on operating systems

This bachelor thesis is focused on cybernetic attacks towards operating systems. In the thesis, there are discussed base security functions of operating systems Windows, Linux and macOS; followed by described cybernetic attacks and its differences. The chapter Malware describes the most harmful software. Next chapter is about common awareness of cybernetic attacks, in which terms antivirus, firewall and IDS/IPS (Intrusion Detection System/Intrusion Prevention System) systems are defined. Following chapter brings scenario of ethics of hacking on operating system of personal computer, server and web server by using penetration tests. The thesis is finished by doing ethics hacking and evaluations. The goal of this thesis is to summarize the problem of cybernetic attacks, methods and tools whose goal is to break the security of the system, the use some of these method to do ethics hacking in virtualized environment