/usr/lib/libevocosm.so is in libevocosm-dev 4.0.2-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/libevocosm-4.0.so.4.0.0
/usr/lib/libevocosm-4.0.so.4.0.0