/usr/share/xfe/icons/gnomeblue-theme/warningbig.png is in xfe-themes 1.37-4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/xfe/icons/gnomeblue-theme/../gnome-theme/warningbig.png
/usr/share/xfe/icons/gnomeblue-theme/../gnome-theme/warningbig.png