基于回调函数的控制流深度模糊模型

控制流是程序过程的抽象表现, 对控制流进行混淆, 可有效提高代码抗逆向能力. 提出了控制流深度模糊思想:针对循环结构, 利用回调函数构造等价循环模型, 将过程内基本块跳转变更为过程间函数调用, 对抗逆向技术. 综合应用控制流分析和数据流依赖性分析, 建立了基于回调函数的控制流深度模糊模型, 并给出功能一致性证明. 为进...

Deep Control Flow Obfuscation Model Based on Callback Function

Control flow is an abstract expression of the program process, and it''s of critical significance to obfuscate the control flow to effectively reinforce the code''s ability to resist reverse manners. This paper proposes the idea of control flow deepening:as for the loop structure, the callback function is utilized to construct an equivalent loop model, and the basic block in the program process is converted into inter-process function calling to counter reverse technology. This paper comprehensively applies control flow analysis and data flow dependency analysis to establish a control flow deepening model based on callback function and gives proof of functional consistency. To further enhance obfuscation, the function calling fusion algorithm is designed and implemented pertinently to construct a more sophisticated function calling process. Finally, OpenSSL and SPECint-2000 benchmark suite are used as the test set to verify the feasibility and effectiveness of this model.