/usr/lib/x86_64-linux-gnu/libexec/kf5/filesharelist is in libkf5kdelibs4support5-bin 5.28.0-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libexec/kf5/fileshareset
/usr/lib/x86_64-linux-gnu/libexec/kf5/fileshareset