/usr/share/live/build/hooks/ is in live-build 4.0.3-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/live/build/hooks/0010-disable-kexec-tools.hook.chroot
/usr/share/live/build/hooks/0020-create-mtab-symlink.hook.chroot
/usr/share/live/build/hooks/0100-remove-adjtime-configuration.hook.chroot
/usr/share/live/build/hooks/0110-remove-backup-files.hook.chroot
/usr/share/live/build/hooks/0120-remove-dbus-machine-id.hook.chroot
/usr/share/live/build/hooks/0130-remove-gnome-icon-cache.hook.chroot
/usr/share/live/build/hooks/0140-remove-log-files.hook.chroot
/usr/share/live/build/hooks/0150-remove-mdadm-configuration.hook.chroot
/usr/share/live/build/hooks/0160-remove-openssh-server-host-keys.hook.chroot
/usr/share/live/build/hooks/0170-remove-python-py.hook.chroot
/usr/share/live/build/hooks/0180-remove-systemd-machine-id.hook.chroot
/usr/share/live/build/hooks/0190-remove-temporary-files.hook.chroot
/usr/share/live/build/hooks/0195-remove-ssl-cert-snakeoil.hook.chroot
/usr/share/live/build/hooks/0200-remove-udev-persistent-cd-rules.hook.chroot
/usr/share/live/build/hooks/0300-remove-udev-persistent-net-rules.hook.chroot
/usr/share/live/build/hooks/0400-update-apt-file-cache.hook.chroot
/usr/share/live/build/hooks/0410-update-apt-xapian-index.hook.chroot
/usr/share/live/build/hooks/0420-update-glx-alternative.hook.chroot
/usr/share/live/build/hooks/0430-update-mlocate-database.hook.chroot
/usr/share/live/build/hooks/0440-update-nvidia-alternative.hook.chroot
/usr/share/live/build/hooks/0910-remove-apt-sources-lists