i viewed many tutorials about dns spoofing and many videos about ettercap and how it works

i want to know how to edit the dns spoof plugin in bt4 i at videos explaining that it says that the plugin file called etter.dns

i searched this file can't be found and when i tried to check the ettercap -NG plugins already loaded they all .so and .lo not etter.dns at all

when i tried to edit the .so file or the .lo file it look weird not like the etter.dns

any help ?