The invention discloses a method for protecting object files The method comprises the steps that after disassembling is conducted on functions needing to be protected in each object file used in software, deformation is conducted on orders of the functions, a junk order is inserted into each function, and therefore each object file is protected and the whole software is protected The invention further discloses a system for protecting the object files The system comprises an analysis module, a disassembling module, a deformation module, a junk order insertion module and a repairing module According to the method and system for protecting the object files, the object files are protected, the protection range can be widened, the difficulty of disassembling and analyzing is increased, and the safety of the software is greatly improved

Method and system for protecting object files

The present invention discloses a binary code anti-obfuscation method based on semanteme, belonging to the field of software security. The method comprises: extracting execution process information of a target program; conducting a taint analysis on the execution process information to obtain a control flow graph; and carrying out instruction tailoring on the target program according to the control flow graph to obtain a concise control flow graph. According to the method provided by the present invention, after it is determined that the target program is an executable file, the target program is executed, all the data during execution period is acquired, key data in all the data and instruction sequences relevant to the key data are labeled, the control flow graph is established by using the instruction sequences with labels, and finally the instruction sequences without labels in the control flow graph are deleted to obtain a concise control flow graph. Anti-obfuscation processing can be performed for the malicious software according to the concise control flow graph, thereby addressing the defect of poor universality of the prior art, improving the application universality that anti-obfuscation processing, and reducing the system overhead to some extent.

Binary code anti-obfuscation method based on semanteme

The invention provides a binary obfuscation method based on a ROP (Return Oriented Programming) attack feature. The method comprises the steps of disassembling an original binary file and dividing basic blocks; carrying out ROP form instrumentation on the basic blocks, thereby obtaining gadget form assembly code ended by a ret instruction; and refactoring recompiled new code and the original binary file, and generating a finally obfuscated executable file. According to the method, through application of a mode of converting a code segment of the binary file into a gadget form, an obfuscation purpose is achieved. The software obfuscation performance loss is low. The deployable performance is high. The dependence on a feature of a special hardware processor is removed.

Binary obfuscation method based on ROP (Return Oriented Programming) attack feature

The invention discloses a code obfuscation method based on two transformations. The method comprises the steps that a to-be-obfuscated code is obtained; the first transformation is conducted, and the to-be-obfuscated code is transformed into an intermediate code in an instruction sequence form; the second transformation is conducted, and the intermediate code is transformed into an obfuscated code. The method is applicable to a computer software program written with the scripting language. Compared with an existing technological means, a procedure code needs to be compiled, and the code obfuscation strength is effectively improved; the code obfuscated by means of the method can run without depending on additional program support, and the requirements for the running environment are effectively reduced.

Code obfuscation method based on two transformations

The invention provides a device and a method for protecting a source code of an application program. The device comprises a splitting module, an arrangement module and a conversion module, wherein the splitting module is used for splitting the source code of the application program into logical units which are arranged in sequence; the arrangement module is used for carrying out random out-of-order arrangement on the logical units which are arranged in sequence and arranging a jump identifier to each logical unit; the jump identifiers are used for identifying the arrangement order of the logical units after random out-of-order arrangement; and the conversion module is used for converting all logical units and jump identifiers into the application program. According to the device and the method for protecting the source code of the application program, which are provided by the invention, a loophole of obtaining the source code of the application program through decompiling of the application program can be effectively avoided, the security of the source code of the application program is improved, and the design thought of the application program is effectively protected.

Device and method for protecting source code of application program

The invention discloses a code morphing-based binary code obfuscation method. The method comprises the following steps: 1, determining a morphing template library; 2, detecting a PE (Portable Execute) file; 3, locating a key code segment; 4, disassembling the key code segment to obtain an assembly instruction sequence, identifying a circular structure in the code segment, and calculating the weight of each instruction in the key code segment; 5, morphing all assembly instructions in the assembly instruction sequence; 6, slicing the assembly instruction sequence and re-sequencing; 7, assembling a new assembly instruction sequence generated in the step 6, and converting into a binary code; 8, reconstructing the PE file. In the method, a computer system is used for obfuscating the executable binary code file under a windows system, so that high protection strength is achieved, and extension becomes easy.

Code morphing-based binary code obfuscation method

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Code morphing-based binary code obfuscation method