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Intrusion prevention system based on Raspberry Pi
Hirš, David ; Gerlich, Tomáš (referee) ; Martinásek, Zdeněk (advisor)
The number of discovered vulnerabilities rapidly increases. For example in 2019 there were discovered 20 362 vulnerabilities. The probability of cyber-attacks realization is high. Therefore it is necessary to propose and implement automated and low-cost Intrusion Prevention or Intrusion Detection Systems (IPS/IDS). This implemetation can focus on home use or small corporate networks. The main goal of the system is to detect or mitigate cyber-attack impact as fast as possible. The master's thesis proposes IPS/IDS based on Raspberry Pi that can detect and prevent various cyber-attacks. Contents of this thesis are focus on description of cyber-attacks based on ISO/OSI model's Link and Network layers. Then there is description of IPS/IDS systems and theirs open source representatives. The practical part is focus on experimental workspace, hardware consumption of choosen detection systems, cyber-attacks scenarios and own implementation of detection program. Detection program is based on these chosen systems and puts them together to be easily manageable.
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Cyber attacks on operating systems
Holasová, Eva ; Komosný, Dan (referee) ; Člupek, Vlastimil (advisor)
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.
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Analýza dopadu počítačových trestných činů na podniky
Belgoziyeva, Ulpan ; Pavlíček, Antonín (advisor) ; Böhmová, Lucie (referee)
Global networks enable businesses to operate beyond the geographical boundaries and to make their processes more efficient. However, with digitalization, there also comes threats for businesses and sometimes companies are underestimating the risks associated with cyber-attacks. As the topic is relatively new, there are not many studies that took a deep look at the impact of cyber-attacks on the businesses and analyze those impacts from different angles. The key objective of the thesis was to cover key aspects of the impacts that cyber crimes can have on businesses, taking into account the various types of cyber-attacks, no matter the size and the sector of activity in which the company operates. To achieve this, I used synthesis analysis of real cyber-attacks cases, and I have split each effect into various categories using classification analysis. Furthermore, to study deeply the consequences that cyber incidents can have on businesses, I have analyzed in depth two large corporations that have suffered such attacks, and I have interviewed 15 experts working in the field of cyber-security. This analysis helped to achieve a complete and segmented picture of the impacts that cyber incidents had on businesses and showed how significantly these could affect business.
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Cyberattack Generator
Gregr, Filip ; Smékal, David (referee) ; Hajný, Jan (advisor)
This thesis is focused on developing a tool that is capable of generating cyber attacks. In the opening there are introduced some attacks using the ISO/OSI application layer protocols. Specifically, these are attacks known as Slowloris, RUDY, Slow Read, HTTP flood, and dictionary attack on the SSH. These attacks are implemented into an existing DoSgen Linux tool that already contains several famous network attacks. The main part of the thesis is devoted to the description of the tool and to the implementation of its own extension. The created tool is practically tested in an experimental enviroment against the Apache web server. Part of the thesis is the documentation for the improved DoSgen tool.
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Modern cyber attacks
Hodes, Vojtěch ; Hajný, Jan (referee) ; Malina, Lukáš (advisor)
This bachelor's thesis deals with contemporary cyber attacks with an emphasis on denial of service attacks. In the theoretical part the thesis focuses on an analysis and description of the cyber attacks. It monitors trends in cyber attacks and also describes generators of denial of service attacks based on software and hardware platform. The practical part uses the information from the theoretical one to design tests of network devices against cyber attacks, their practical realization and a comparison between used cyber attacks. At the very end the thesis offers possible countermeasures against them.
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