/usr/share/dbus-1/system-services/ is in system-tools-backends 2.10.2-1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/dbus-1/system-services/org.freedesktop.SystemToolsBackends.GroupConfig2.service
/usr/share/dbus-1/system-services/org.freedesktop.SystemToolsBackends.GroupsConfig2.service
/usr/share/dbus-1/system-services/org.freedesktop.SystemToolsBackends.HostsConfig.service
/usr/share/dbus-1/system-services/org.freedesktop.SystemToolsBackends.IfacesConfig.service
/usr/share/dbus-1/system-services/org.freedesktop.SystemToolsBackends.NFSConfig.service
/usr/share/dbus-1/system-services/org.freedesktop.SystemToolsBackends.NTPConfig.service
/usr/share/dbus-1/system-services/org.freedesktop.SystemToolsBackends.Platform.service
/usr/share/dbus-1/system-services/org.freedesktop.SystemToolsBackends.SMBConfig.service
/usr/share/dbus-1/system-services/org.freedesktop.SystemToolsBackends.SelfConfig2.service
/usr/share/dbus-1/system-services/org.freedesktop.SystemToolsBackends.ServiceConfig2.service
/usr/share/dbus-1/system-services/org.freedesktop.SystemToolsBackends.ServicesConfig.service
/usr/share/dbus-1/system-services/org.freedesktop.SystemToolsBackends.TimeConfig.service
/usr/share/dbus-1/system-services/org.freedesktop.SystemToolsBackends.UserConfig2.service
/usr/share/dbus-1/system-services/org.freedesktop.SystemToolsBackends.UsersConfig2.service
/usr/share/dbus-1/system-services/org.freedesktop.SystemToolsBackends.service