Like on windows there are exe (compiled from python, C or C++ assembly), VBS, bat extensions to name a few that can be dangerous.
But if Linux malware was to be made that could spread or do damage what would be its source extension? and this very question is why Linux has little malware or least a moderate malware scale. You see malware can be any file extension such as C,C++,Go,python,VBS you name it. but in a actual situation. one that seems discreet just one user happens to run it. now this can come from anything, let me set up a Situation:
User is on a forum and another Linux user made software that can assist in programs ram runtime and memory usage. User wants to try it out so they will download the zip file like another person would do, unzip the file then see the readme license and a few files, and the malware will be in filename Ramctrl.randomextension and they run it.
Okay this sounds funny and very silly and the probability of this happening is very low. but what would that magic file extension be? and how effective would you think it would be?