Optir-SBERT: Cross-Architecture Binary Code Similarity Detection Based on Optimized LLVM IR

Cross-architecture binary code similarity detection plays an important role in different security domains. In view of the low accuracy and poor scalability of existing cross-architecture detection technologies, we propose Optir-SBERT, which is the first technology to detect cross-architecture binary code similarity based on optimized LLVM IR. At the same time, we design a new data set BinaryIR, which is more diverse and provides a benchmark data set for subsequent research work based on LLVM IR. In terms of cross-architecture binary code similarity detection, the accuracy of Optir-SBERT reaches 94.38%, and the contribution of optimization is 3.99%. In terms of vulnerability detection, the average accuracy of Optir-SBERT reach 93.9%, and the contribution of optimization is 7%. The results are better than existing state-of-the-art (SOTA) cross-architecture detection technologies. In order to improve the efficiency of vulnerability detection in realistic scenarios, we introduced a file-level vulnerability identification mechanism on the basis of Optir-SBERT. The new model Optir-SBERT-F saved 45.36% of the detection time on the premise of a slight decrease in detection F value, which greatly improves the efficiency of vulnerability detection.