/usr/lib/x86_64-linux-gnu/libunshield.so is in libunshield-dev 1.4.2-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libunshield.so.0
/usr/lib/x86_64-linux-gnu/libunshield.so.0