/usr/lib/x86_64-linux-gnu/kamailio/libkamailio_ims.so.0 is in kamailio-ims-modules 4.4.4-2+deb9u3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/kamailio/libkamailio_ims.so.0.1