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Extending YARA Language
Kender, Tomáš ; Zobal, Lukáš (referee) ; Regéciová, Dominika (advisor)
This thesis is focused at improvements for a tool called YARA, which is used for describing malware patterns and finding these patterns in files that are subject for scanning. We will add new syntactic features and improve the scanning process of behavioral files generated by Cuckoo Sandbox. During the process of adding these features, we will extend lexical and syntactic rules of the language, introduce a dynamic array type, optimize bytecode and implement a new command for it. The output of this thesis is going to be a new version of YARA that simplifies rule writing for malware analysts and aims to improve scanning performance of behavioral data.
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Java Bytecode Size Optimization
Poncová, Vendula ; Smrčka, Aleš (referee) ; Kočí, Radek (advisor)
This paper deals with the Java bytecode size optimization. It describes the Java Virtual Machine and the Java class file format. It also presents some tools for the bytecode manipulation. Using these tools, I have analyzed selected data and found sequences of instructions, that could be optimized. Based on the results of the analysis, I have designed and implemented methods for bytecode size optimization. The bytecode size of the selected data was reduced by roughly 25%.
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A Comparison of CACAO Virtual Machine and HotSpot JVM
Malík, Nikolaj ; Janoušek, Vladimír (referee) ; Kočí, Radek (advisor)
The aim of this thesis is introduction of Java platform and two chosen representants of Java Virtual Machine (JVM) implementations. At first JVM HotSpot as widespread one and on the other side JVM CACAO as an alternative option. This thesis describes implementation of chosen areas of both machines. It provides useful information for everybody who deals with runtime program optimalization. Final part presents benchmark results of the match between abovementioned machines by memory and time complexity.
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A Comparison of CACAO Virtual Machine and HotSpot JVM
Malík, Nikolaj ; Janoušek, Vladimír (referee) ; Kočí, Radek (advisor)
The aim of this thesis is introduction of Java platform and two chosen representants of Java Virtual Machine (JVM) implementations. At first JVM HotSpot as widespread one and on the other side JVM CACAO as an alternative option. This thesis describes implementation of chosen areas of both machines. It provides useful information for everybody who deals with runtime program optimalization. Final part presents benchmark results of the match between abovementioned machines by memory and time complexity.
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Java Bytecode Size Optimization
Poncová, Vendula ; Smrčka, Aleš (referee) ; Kočí, Radek (advisor)
This paper deals with the Java bytecode size optimization. It describes the Java Virtual Machine and the Java class file format. It also presents some tools for the bytecode manipulation. Using these tools, I have analyzed selected data and found sequences of instructions, that could be optimized. Based on the results of the analysis, I have designed and implemented methods for bytecode size optimization. The bytecode size of the selected data was reduced by roughly 25%.
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Generic Decompilation of Bytecode into High-Level Representation
Mrázek, Petr ; Zemek, Petr (referee) ; Křoustek, Jakub (advisor)
The work describes methods and principles of decompilation, basic information about reverse engineering and its use in both software engineering and engineering in general. Furthermore, it introduces the decompiler developed within the Lissom project at BUT FIT. The goal of the work is to design and implement a retargetable decompiler for bytecode, which extends the original decompiler.
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