/usr/lib/x86_64-linux-gnu/libcares.so is in libc-ares-dev 1.9.1-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libcares.so.2.0.0
/usr/lib/x86_64-linux-gnu/libcares.so.2.0.0