/usr/share/pam-configs/winbind is in libpam-winbind 2:4.7.6+dfsg~ubuntu-0ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 | Name: Winbind NT/Active Directory authentication
Default: yes
Priority: 192
Auth-Type: Primary
Auth:
	[success=end default=ignore]	pam_winbind.so krb5_auth krb5_ccache_type=FILE cached_login try_first_pass
Auth-Initial:
	[success=end default=ignore]	pam_winbind.so krb5_auth krb5_ccache_type=FILE cached_login
Account-Type: Primary
Account:
	[success=end new_authtok_reqd=done default=ignore]	pam_winbind.so
Password-Type: Primary
Password:
	[success=end default=ignore]	pam_winbind.so use_authtok try_first_pass
Password-Initial:
	[success=end default=ignore]	pam_winbind.so
Session-Type: Additional
Session:
	optional			pam_winbind.so
 |