Staint source identification method, taint source identification device, electronic equipment and medium

The invention provides a stain source identification method, a stain source identification device, electronic equipment and a medium. The method comprises the steps that similarity calculation is conducted on a behavior feature vector corresponding to each function in target firmware and a target feature matrix, the similarity score of each function is determined, and the behavior feature vector corresponding to each function is determined based on a binary program in the target firmware; the target feature matrix is constructed based on a behavior feature vector corresponding to a memory operation function; based on the similarity score of each function, an objective function serving as a stain source is determined, and the objective function is used for stain analysis. According to the taint source identification method provided by the invention, the taint source in the custom function can be determined for the binary program in the target firmware, and taint analysis is carried out, so that the safety defe