/usr/lib/x86_64-linux-gnu/libevt.so is in libevt-dev 20170120-1+deb9u1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libevt.so.1.0.0
/usr/lib/x86_64-linux-gnu/libevt.so.1.0.0