What does the tool Dependency Walker do within an executable file?

The tool Dependency Walker is designed to analyze executable files and list all the modules that the executable depends on. It creates a comprehensive view by building a tree diagram that visually represents these relationships, which can include DLL files and other linked resources necessary for the executable to run. This functionality is particularly useful for developers and researchers in understanding how an application is constructed and identifying potential issues related to missing modules or incompatibilities. Understanding module dependencies can also aid in the context of digital forensics where analyzing how malware operates might involve assessing which components it relies upon. The tree diagram simplifies this complex structure, making it easier to analyze the dependencies.

Other options, on the other hand, imply functions that are not part of Dependency Walker's purpose. The tool does not perform any form of encryption, execute any code, or act to remove malicious code. Its specific focus is on providing a detailed overview of module relationships, which makes option B the correct choice.