Cybernetics and programming
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Publications of Velizhanin Anatolii Sergeevich
Cybernetics and programming, 2019-2
Revnivykh A.V., Velizhanin A.S. - Methods for automated formation of a disassembled listing structure pp. 1-16


Abstract: The subject of the research is the method of splitting a disassembled code into logical blocks in automatic mode, searching for software vulnerabilities without using source code (using a binary file or its equivalent, obtained by reverse engineering).The object of the research is the existing code analyzers and features of their functionality.The aim of the study is to consider the possibility of splitting a disassembled code into logical blocks in automatic mode and some of the possible difficulties associated with this.Formulation of the problem. The complexity of analyzing large software products at the level of machine code necessitates the automation of this process. The research methodology is based on a combination of theoretical and empirical approaches using the methods of static and dynamic analysis, comparison, generalization, algorithmization, modeling, synthesis. Key findings. Splitting the code into blocks by sequential in line-by-line analysis of machine code in some cases can lead to misinterpretation. In addition, the analysis of the code according to the conclusions of the functions also does not guarantee the correctness of the determination of the boundaries of the functions. However, in general, the matrix method can be applied to analyze the dependencies of functions on the blocks of code thus selected.The scientific novelty is connected with the determination of promising vectors for the study of software code for vulnerability, the rationale for the approach (building the transition matrix from integer values), which may be the initial stage of preparation for the automated analysis of the disassembled code.
Cybernetics and programming, 2018-6
Revnivykh A.V., Velizhanin A.S. - The method of automated research of the structure of disassembled representation of software code with a buffer overflow vulnerability using the matrix approach pp. 11-30


Abstract: The subject of the research is the optimization algorithms for automated dependency search on disassembled code. The object of the research is the dependent code blocks on the x64 architecture of Intel processors manufactured by the company and listings obtained as a result of reverse engineering software by compilers with different settings in Windows and Linux.Purpose of the study. The purpose of the study is to consider the possibility of using mathematical matrices to build a machine code map, and also to review possible problems for automatic analysis, to search for the paths of information flows. Research methods. We used the Visual C ++ compiler. We consider the architecture in which the transfer of information can be carried out in the following ways: register-memory, memory-register, register-register. For the analysis, the method of forming the list of functions called up to the potentially dangerous block of code under investigation, chosen for each considered path to the block under study, was chosen. Methods for implementing the matrix approach are described and developed. Novelty and key findings. Mathematical matrix method can be used to build a machine code map. However, determining the reachability paths of individual code blocks may require a significant amount of resources. In addition, the machine code can be exposed to packers and obfuscators, which also introduces additional complexity. A number of potentially dangerous functions of the standard library of the C / C ++ programming language were identified.
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