/usr/bin/syrthes_create_case is in syrthes 3.4.3-dfsg1-5.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/bin/../lib/syrthes/bin/syrthes_create_case
/usr/bin/../lib/syrthes/bin/syrthes_create_case