Soongsil University

Sunjun Lee

Jeong Hyun Yi

Minseong Choi

A method for evaluating the risk of data leakage in an application includes the steps of: extracting a DEX (Dalvik Executable) file and a so (Shared Object) file by decompressing an APK file of a mobile application; extracting DEX code information from the DEX file by parsing the DEX file; translating a content of the so file into IR (Intermediate Representation); extracting IR code information from the translated IR; generating a call-reference structure between the DEX file and the so file by processing the extracted DEX code information and the extracted IR code information; and outputting weakness information according to a risk designated in advance based on the generated call-reference structure. Accordingly, it is possible to extend the call-reference coverage of an android application.

Method for evaluating risk of data leakage in application, recording medium and device for performing the method

Provided is a method for bypassing an analysis evasion technique, which includes: loading a dummy DEX file; parsing a dummy method containing a dummy code from the dummy DEX file; a bypass point identifying step of determining whether a function to be currently called is a bypass target function to which the analysis evasion technique is applied; a branch target point changing step of changing information according to the determination result so that the dummy code is executed instead of the call target function; and a dummy code executing step of transmitting the dummy code to a framework of the application, so that a modulated framework is executed with a bypass code.

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Seoul, South Korea

Sunjun Lee