/usr/lib/ is in lightdm-gtk-greeter-settings 1.2.1-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python3/
/usr/lib/python3/dist-packages/
/usr/lib/python3/dist-packages/lightdm_gtk_greeter_settings/
/usr/lib/python3/dist-packages/lightdm_gtk_greeter_settings/IndicatorsEntry.py
/usr/lib/python3/dist-packages/lightdm_gtk_greeter_settings/IndicatorPropertiesDialog.py
/usr/lib/python3/dist-packages/lightdm_gtk_greeter_settings/__init__.py
/usr/lib/python3/dist-packages/lightdm_gtk_greeter_settings/GtkGreeterSettingsWindow.py
/usr/lib/python3/dist-packages/lightdm_gtk_greeter_settings/Config.py
/usr/lib/python3/dist-packages/lightdm_gtk_greeter_settings/installation_config.py
/usr/lib/python3/dist-packages/lightdm_gtk_greeter_settings/IconChooserDialog.py
/usr/lib/python3/dist-packages/lightdm_gtk_greeter_settings/IconEntry.py
/usr/lib/python3/dist-packages/lightdm_gtk_greeter_settings/helpers.py
/usr/lib/python3/dist-packages/lightdm_gtk_greeter_settings/MultiheadSetupDialog.py
/usr/lib/python3/dist-packages/lightdm_gtk_greeter_settings/PositionEntry.py
/usr/lib/python3/dist-packages/lightdm_gtk_greeter_settings/OptionEntry.py
/usr/lib/python3/dist-packages/lightdm_gtk_greeter_settings/OptionGroup.py
/usr/lib/python3/dist-packages/lightdm_gtk_greeter_settings/MonitorsGroup.py
/usr/lib/python3/dist-packages/lightdm_gtk_greeter_settings-1.2.1.egg-info