/usr/bin/syrthes4ensight is in syrthes-tools 4.3.0-dfsg1-2build1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/bin/../lib/syrthes/bin/syrthes4ensight
/usr/bin/../lib/syrthes/bin/syrthes4ensight