Yes it also like suspicious or malware for me too, i am sure and i have proof. These guys supply malware i guess. i installed this plugin, it create folder in my root called “S”.
I uninstall all plugins except this one as my doubt. i got proof. but suspicious folder creation process not stopping. after some time i also removed this plugin, now this suspicious activities gone stop forever. i tried same process more than 3 sites. now i am decided it is suspicious plugin. Never use it guys.