Analysis system, analysis method, analysis device, and storage medium for analyzing operation of a program executed in an analysis environment

Provided is an analysis system including: an operation analysis unit that analyzes operation of an analysis target program that is a target program to be analyzed, by executing the analysis target program in a second execution environment that is a computing environment for analysis, the second execution environment being configured to emulate at least a partial configuration of a first execution environment that is a computing environment for real operation where the analysis target program is able to be executed; and a configuration unit that builds the second execution environment capable of emulating a specific configuration of the first execution environment, the specific configuration relevant to an operation of the analysis target program, by modifying at least a partial configuration of the second execution environment in accordance with the operation of the analysis target program analyzed by the operation analysis unit.