/usr/lib/x86_64-linux-gnu/ is in libzeroc-ice35-dev 3.5.1-6+b3.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/libIceBox.so
/usr/lib/x86_64-linux-gnu/libIceStormService.so
/usr/lib/x86_64-linux-gnu/libIceGridSqlDB.so
/usr/lib/x86_64-linux-gnu/libIcePatch2.so
/usr/lib/x86_64-linux-gnu/libIce.so
/usr/lib/x86_64-linux-gnu/libIceUtil.so
/usr/lib/x86_64-linux-gnu/libSlice.so
/usr/lib/x86_64-linux-gnu/libIceGridFreezeDB.so
/usr/lib/x86_64-linux-gnu/libIceSSL.so
/usr/lib/x86_64-linux-gnu/libIceStormFreezeDB.so
/usr/lib/x86_64-linux-gnu/libIceStormSqlDB.so
/usr/lib/x86_64-linux-gnu/libIceXML.so
/usr/lib/x86_64-linux-gnu/libFreeze.so
/usr/lib/x86_64-linux-gnu/libGlacier2.so
/usr/lib/x86_64-linux-gnu/libIceGrid.so
/usr/lib/x86_64-linux-gnu/libIceStorm.so
/usr/lib/x86_64-linux-gnu/libIceDB.so