/usr/share/ettercap/lua/core/ is in ettercap-common 1:0.8.2-2build1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/ettercap/lua/core/base64.lua
/usr/share/ettercap/lua/core/dumper.lua
/usr/share/ettercap/lua/core/ec_string.lua
/usr/share/ettercap/lua/core/eclib.lua
/usr/share/ettercap/lua/core/ettercap.lua
/usr/share/ettercap/lua/core/ettercap_ffi.lua
/usr/share/ettercap/lua/core/ettercap_reg.lua
/usr/share/ettercap/lua/core/hook_points.lua
/usr/share/ettercap/lua/core/http.lua
/usr/share/ettercap/lua/core/packet.lua
/usr/share/ettercap/lua/core/packet_meta.lua
/usr/share/ettercap/lua/core/shortpacket.lua
/usr/share/ettercap/lua/core/shortsession.lua