/usr/lib/x86_64-linux-gnu/libsss_sudo.so is in libsss-sudo-dev 1.8.2-0ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libsss_sudo.so.0.0.0
/usr/lib/x86_64-linux-gnu/libsss_sudo.so.0.0.0