/usr/lib/ is in libinsighttoolkit3-dev 3.20.1+git20120521-6build1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/libITKEXPAT.so
/usr/lib/libitkv3p_netlib.so
/usr/lib/libitkv3p_lsqr.so
/usr/lib/InsightToolkit/
/usr/lib/InsightToolkit/ITKConfig.cmake
/usr/lib/InsightToolkit/UseITK.cmake
/usr/lib/InsightToolkit/ITKLibraryDepends.cmake
/usr/lib/libITKSpatialObject.so
/usr/lib/libITKBasicFilters.so
/usr/lib/libitkjpeg16.so
/usr/lib/libitktiff.so
/usr/lib/libITKCommon.so
/usr/lib/libITKMetaIO.so
/usr/lib/libITKTransformIOReview.so
/usr/lib/libITKAlgorithms.so
/usr/lib/libitkNetlibSlatec.so
/usr/lib/libITKznz.so
/usr/lib/libITKniftiio.so
/usr/lib/libitkjpeg12.so
/usr/lib/libitkvnl_inst.so
/usr/lib/libITKDICOMParser.so
/usr/lib/libitkvnl_algo.so
/usr/lib/libITKIOReview.so
/usr/lib/libitkvcl.so
/usr/lib/libitkopenjpeg.so
/usr/lib/libITKIO.so
/usr/lib/libITKNrrdIO.so
/usr/lib/libitkjpeg8.so
/usr/lib/libITKStatistics.so
/usr/lib/libITKQuadEdgeMesh.so
/usr/lib/libitksys.so
/usr/lib/libITKNumerics.so
/usr/lib/libITKFEM.so
/usr/lib/libitkvnl.so