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Virus Checking Module for Thunderbird
Ďurfina, Lukáš ; Rychnovský, Lukáš (referee) ; Peringer, Petr (advisor)
This bachelor thesis deals with development of virus checking module for e-mail client Thunderbird. The module checks e-mail content using AVG tools. It is accomplished by scanning attachments in incoming and outgoing e-mails. The module is implemented by using technologies XUL, XPCOM, JavaScript and DOM. It works successfully with protocols POP3 and IMAP, and provides execution of several actions with infected message.
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System for Pattern Recognition in Binary Files
Milkovič, Marek ; Kolář, Dušan (referee) ; Matula, Peter (advisor)
Malicious software spreads really fast in the age of the Internet and it harms users and their data. Therefore, it is necessary to improve methods of how we deal with its analysis, so we can protect potential victims. This thesis deals with design and implementation of system for generating patterns out of executable files in cooperation with AVG Technologies. The goal of this work is to create a tool that generates a detection pattern from the set of binary files. This work further proposes new types of analyses for extraction of information out of executable files. Designed and implemented system is used in practice for analysis of new malicious code and it is integrated into the clustering system.
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Valuation of AVG Technologies CZ, s.r.o. and process of acquisition
Milotová, Aneta ; Brabenec, Tomáš (advisor) ; Novotný, Jakub (referee)
This Diploma thesis "Valuation of AVG Technologies CZ, s.r.o. and process of acquisition" is formed as an expert opinion. The goal of this thesis is to find a market value for the needs as at 1 January 2016. Valuation of company is compiled mostly from public available data. As a main valuation method was used DFC entity. The thesis consists of complex strategic analysis, the financial analysis, value drivers, financial plan and a final valuation.
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Decompilation of High-Level Constructions in C++ Binaries
Jakub, Dušan ; Křivka, Zbyněk (referee) ; Matula, Peter (advisor)
The thesis addresses the decompilation of high-level object-oriented C++ language from a machine code. The term reverse engineering is defined and existing decompilers are described with emphasis on their ability to reconstruct C++. AVG decompiler project is introduced, to which this thesis contributes. C++ language is analysed, both on a logical level and in the machine code and existing methods of decompilation are described. On this basis a novel method is introduced, capable of decompiling classes, their hierarchy, constructors, destructors and definitions and usages of virtual methods. The method is implemented, tested and evaluated. In the conclusion, several suggestions for future development of this project are presented.
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Choosing an antivirus program
David, Jan ; Pícka, Marek (advisor) ; Hanzlík, Petr (referee)
This bachelor thesis is focused on choosing a free antivirus software for basic internet usage on a personal computer.
The first part focuses on the issue of malicious software and is divided into categories based on various viewpoints. In addition, several types of prevention are mentioned. This part also explains the history of antivirus software.
The second part contains the actual comparison of five freeware antiviruses. Selection of these five programs is based on a survey. The test consists of five criteria: time of computer deep scan, disc usage, memory usage, user interface and safety rating by AV-Test. These criteria are weighted using Saaty method and the final result is calculated using a weighted sum method.
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Code Structuring in Decompiler Back-End
Porwolik, Tomáš ; Kučera, Jiří (referee) ; Matula, Peter (advisor)
This thesis deals with a decompilation tool which converts low-level binary code to a high-level representation. This tool is being developed by AVG Technologies. The aim of this work is to design and implement a method for code structuring in the decompiler back-end. The designed method works by traversing the control-flow graph with matching of predefined patterns. It is not always possible to structure code using conditional statements and loops. Sometimes also goto statements must be used. The implemented solution is compared with the original solution in the decompiler. According to the results the new solution is faster, better tested, but in greater number of test cases generates invalid code. From the viewpoint of structuring the results are different and sometimes the code is structured better, but sometimes worse.
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Analysis of AVG signals
Janeček, David ; Balogh, Jaroslav (referee) ; Rozman, Jiří (advisor)
This semestral project deals with analytical arteriovelocitogram (AVG). In the first part I a question of collection data AVG curve. Doppler effect and principal of Doppler‘s systems whose assistance data gain is analyzed in this semestral project. In the next part I focus on methods of analytic signals AVG. This means discribing the curve, calculating coefficients or methods for correct evaluation of the signal. These analyzes should categorize the measured data into groups according to pathological changes, of which doctors will determine the next course of treatment. The final chapter deals with the method of cluster analysis to classify data measured by Doppler systems. I deal with the algorithm method and choose the best clustering procedure. In the following section I concern with the practical part. I describe the data which were provided, the program selected for the analysis and the description of the alghoritm. The last chapter describes the results I’ve obtained.
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Profiling of Non-Core Part of Security System
Špaček, Petr ; Michal, Bohumil (referee) ; Kašpárek, Tomáš (advisor)
The thesis is focused on identifying and eliminating performance problems in the security system "AVG Server Edition 8.5 for Linux/FreeBSD", which is used for filtering SMTP traffic. It includes explanation of the principle of SMTP proxy filter and of the interconnection between AVG and the Postfix mail system. It describes methodology of testing, sample designing, measurement and data evaluation. Several performance problems were found and steps to eliminate them were carried out. Suggested optimization was tested and found effective.
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MS-NAP Support for AVG System
Kuchta, Ondřej ; Trchalík, Roman (referee) ; Očenášek, Pavel (advisor)
This bachelor thesis deals with design and implementation of Microsoft NAP technology for AVG antivirus from the AVG Technologies Company. First part describes general architecture and deployment options of NAP technology. The next part describes design and implementation of client-side and server-side NAP support for AVG antivirus. The result is a comprehensive document about design and implementation of NAP for third-parties software solutions.
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