/usr/lib/linux-tools/4.15.0-44-lowlatency/usbipd is in linux-tools-4.15.0-44-lowlatency 4.15.0-44.47.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/linux-tools/4.15.0-44-lowlatency/../../linux-tools-4.15.0-44/usbipd