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Application displaying the course of cyber attacks
Safonov, Yehor ; Gerlich, Tomáš (referee) ; Martinásek, Zdeněk (advisor)
Nowadays, the safety of end stations is a topical issue. The complexity of the programming equipment of the computing systems brings about a greater probability of creating vulnerabilities, which could be used as a new anchor point for possible attacks aimed at endpoint computers or the whole company infrastructure. One of the main goals of this bachelor thesis is to create an instrument that would allow system administrators to perform more effective analysis and countermeasures directed to prevent the emergence of negative threats. From a theoretical point of view, the bachelor thesis will focus on the most common attacks on modern operating systems with an emphasis on Windows. It will then deal with the problematics of malicious code, especially with the principles of its operation, specific features and current trends. In the practical part, focus will be placed on the implementation of a robust application that will become a part of the project that is currnetly being developed in TrustPort company. In the beginning, the bachelor thesis is going to analyze different use cases of the application. Further it will make comparisons between different graphical representations, which could be displayed. Subsequently, the thesis is going to define the sets of functional, non-functional and critical requirements for the implementation as to create a concept of future application, specifically its architecture and user interface. During the next step a plan of the implementation of the proposed application is going to be presented. This plan is logically divided into several stages for better understanding. According to the implemented parts, the functionality of the application will be tested on the most commonly detected user attacks. At the end of the work, possible expansion, improvements and a concise conclusion will be stated.
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Ransomware Traffic Analysis
Šrubař, Michal ; Grégr, Matěj (referee) ; Ryšavý, Ondřej (advisor)
The focus of this work is crypto-ransomware; a variant of malware, an analysis of this malware’s network communication, and the identification of means by which it may be detected in the network. The thesis describes the methodology and environment in which the malware’s network communications were studied. The first part of the thesis provides a network traffic analysis of this type of malware with a focus on HTTP and DNS communication, including anomalies that can be observed in the network during this malware’s activity. The thesis also includes a discussion of the user behavior of devices infected by this type of malware. The resulting data was used to identify and describe four detection methods that are able to recognize the malware from its network communication using the HTTP protocol. Finally, a description of several signatures that can be used as indicators of a possible infection by this malware are provided.
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