/usr/lib/x86_64-linux-gnu/libugS3.so is in libug-dev 3.11.0-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libugS3-3.11.0.so
/usr/lib/x86_64-linux-gnu/libugS3-3.11.0.so