/usr/lib/libeXosip2.so.4 is in libexosip2-4 3.3.0-1.1ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/libeXosip2.so.4.2.0
/usr/lib/libeXosip2.so.4.2.0