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Android application permission overflow vulnerability detection and malicious behavior identification method

An application and vulnerability detection technology, applied in character and pattern recognition, program code conversion, decompilation/disassembly, etc., can solve the problems of code obfuscation, difficulty in effectively extracting typical features, and new unknown malware without killing, etc. Achieve the effect of reducing false positive rate, easy extraction and analysis

Inactive Publication Date: 2018-05-25
XIAN UNIV OF SCI & TECH
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AI Technical Summary

Problems solved by technology

This method relies on the analysis and extraction of historical malicious programs, and has almost no ability to detect and kill new unknown malware
In addition, many malicious programs use code obfuscation and encryption in order to evade detection, which makes it difficult to effectively extract typical features.

Method used

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  • Android application permission overflow vulnerability detection and malicious behavior identification method
  • Android application permission overflow vulnerability detection and malicious behavior identification method
  • Android application permission overflow vulnerability detection and malicious behavior identification method

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Embodiment Construction

[0033] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0034] In a specific embodiment, the detection method specifically includes the following steps:

[0035] Step 1: Use APKTool and Dare to decompile the APK file to be tested to obtain a Java bytecode program, which is the basis for all subsequent analysis. Among them, APKTool translates the Android dex file into a smali file, and Dare converts the smali file format into a Java bytecode format for subsequent analysis.

[0036] Step 2: Use string search to find all sensitive API calls in the program. "Sensitive API" refers to class methods that require permissions in the Android framework. Examples of sensitive APIs are shown in Table 1.

[0037] Table 1 Sensitive API and dependent permissions

[0038]

[0039] Step 3: The sending point of the Intent object refers to the code fragment in the program that sends the Intent object. The re...

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Abstract

The invention discloses an Android application permission overflow vulnerability detection and malicious behavior identification method. According to the method, a static analysis method and a stringanalysis method are adopted, program points which use permissions in an APP are taken full account of, and an upper bound of an actual permission using set of an Android APP is accurately and effectively extracted to reduce permission overflow false positive rate; actual using permissions are taken as characteristics to describe behavioral characteristics of the APP more accurately, and an APP malicious behavior classifier with high accuracy and low false positive rate is constructed on the basis.

Description

technical field [0001] The invention relates to the field of software security, and mainly relates to a method for detecting the overflow vulnerability of an Android mobile application program through a static analysis method, and identifying its malicious behavior through the permission characteristics of the application program. Background technique [0002] Due to the flaws in Android's own security mechanism, a large number of Android applications with security vulnerabilities or even malicious behaviors have been produced and widely disseminated through a large number of uneven third-party application markets in China, and personal and public private data are frequently stolen and abused. , a serious threat to personal privacy, and even national economic and political security. Therefore, it is of great significance to study the malicious behavior detection method of Android application program (hereinafter referred to as APP) and develop the detection system for the pr...

Claims

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Application Information

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IPC IPC(8): G06F21/56G06F21/57G06K9/62G06F8/53
CPCG06F8/53G06F21/56G06F21/577G06F18/24
Inventor 刘晓建雷倩
Owner XIAN UNIV OF SCI & TECH
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