/usr/share/kde4/apps/kconf_update/ is in kde-window-manager-common 4:4.11.8-0ubuntu6.
This file is owned by root:root, with mode 0o755.
..
/usr/share/kde4/apps/kconf_update/kwin_fsp_workarounds_1.upd
/usr/share/kde4/apps/kconf_update/kwin_remove_delay_focus.sh
/usr/share/kde4/apps/kconf_update/kwin_remove_delay_focus.upd
/usr/share/kde4/apps/kconf_update/kwin_remove_effects.upd
/usr/share/kde4/apps/kconf_update/kwin_translate_activity_rule.sh
/usr/share/kde4/apps/kconf_update/kwin_translate_activity_rule.upd
/usr/share/kde4/apps/kconf_update/kwin_update_410.upd
/usr/share/kde4/apps/kconf_update/kwin_update_411.upd
/usr/share/kde4/apps/kconf_update/kwin_update_49.upd
/usr/share/kde4/apps/kconf_update/kwin_update_tabbox_qml_settings.upd
/usr/share/kde4/apps/kconf_update/kwin_update_tabbox_settings.upd
/usr/share/kde4/apps/kconf_update/oxygen.upd
/usr/share/kde4/apps/kconf_update/update_oxygen.pl