/usr/share/moodle/mod/assignment/ is in wims-moodle 4.0-18.
This file is owned by root:root, with mode 0o755.
..
/usr/share/moodle/mod/assignment/type/
/usr/share/moodle/mod/assignment/type/wims/
/usr/share/moodle/mod/assignment/type/wims/all.php
/usr/share/moodle/mod/assignment/type/wims/assignment.class.php
/usr/share/moodle/mod/assignment/type/wims/backup/
/usr/share/moodle/mod/assignment/type/wims/backup/moodle1/
/usr/share/moodle/mod/assignment/type/wims/backup/moodle1/lib.php
/usr/share/moodle/mod/assignment/type/wims/closing.php
/usr/share/moodle/mod/assignment/type/wims/file.php
/usr/share/moodle/mod/assignment/type/wims/getcsv.php
/usr/share/moodle/mod/assignment/type/wims/getsheetsource.php
/usr/share/moodle/mod/assignment/type/wims/lang/
/usr/share/moodle/mod/assignment/type/wims/lang/en/
/usr/share/moodle/mod/assignment/type/wims/lang/en/assignment_wims.php
/usr/share/moodle/mod/assignment/type/wims/lang/fr/
/usr/share/moodle/mod/assignment/type/wims/lang/fr/assignment_wims.php
/usr/share/moodle/mod/assignment/type/wims/twoframes.php
/usr/share/moodle/mod/assignment/type/wims/version.php
/usr/share/moodle/mod/assignment/type/wims/wims_raw.php
/usr/share/moodle/mod/assignment/type/wims/wimsclass.php
/usr/share/moodle/mod/assignment/type/wims/wimsconf.php