/usr/share/check_mk/web/plugins/wato/ is in check-mk-multisite 1.2.8p16-1ubuntu0.1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/check_mk/web/plugins/wato/active_checks.py
/usr/share/check_mk/web/plugins/wato/auth.py
/usr/share/check_mk/web/plugins/wato/backup_domains.py
/usr/share/check_mk/web/plugins/wato/bi.py
/usr/share/check_mk/web/plugins/wato/builtin_attributes.py
/usr/share/check_mk/web/plugins/wato/builtin_modules.py
/usr/share/check_mk/web/plugins/wato/check_mk_configuration.py
/usr/share/check_mk/web/plugins/wato/check_parameters.py
/usr/share/check_mk/web/plugins/wato/datasource_programs.py
/usr/share/check_mk/web/plugins/wato/globals_notification.py
/usr/share/check_mk/web/plugins/wato/inventory.py
/usr/share/check_mk/web/plugins/wato/nagvis_auth.py
/usr/share/check_mk/web/plugins/wato/notifications.py
/usr/share/check_mk/web/plugins/wato/user_attributes.py