/usr/share/perl5/Excel/Writer/ is in libexcel-writer-xlsx-perl 0.86-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/perl5/Excel/Writer/XLSX/
/usr/share/perl5/Excel/Writer/XLSX.pm
/usr/share/perl5/Excel/Writer/XLSX/Chart/
/usr/share/perl5/Excel/Writer/XLSX/Chart.pm
/usr/share/perl5/Excel/Writer/XLSX/Chart/Area.pm
/usr/share/perl5/Excel/Writer/XLSX/Chart/Bar.pm
/usr/share/perl5/Excel/Writer/XLSX/Chart/Column.pm
/usr/share/perl5/Excel/Writer/XLSX/Chart/Doughnut.pm
/usr/share/perl5/Excel/Writer/XLSX/Chart/Line.pm
/usr/share/perl5/Excel/Writer/XLSX/Chart/Pie.pm
/usr/share/perl5/Excel/Writer/XLSX/Chart/Radar.pm
/usr/share/perl5/Excel/Writer/XLSX/Chart/Scatter.pm
/usr/share/perl5/Excel/Writer/XLSX/Chart/Stock.pm
/usr/share/perl5/Excel/Writer/XLSX/Chartsheet.pm
/usr/share/perl5/Excel/Writer/XLSX/Drawing.pm
/usr/share/perl5/Excel/Writer/XLSX/Examples.pm
/usr/share/perl5/Excel/Writer/XLSX/Format.pm
/usr/share/perl5/Excel/Writer/XLSX/Package/
/usr/share/perl5/Excel/Writer/XLSX/Package/App.pm
/usr/share/perl5/Excel/Writer/XLSX/Package/Comments.pm
/usr/share/perl5/Excel/Writer/XLSX/Package/ContentTypes.pm
/usr/share/perl5/Excel/Writer/XLSX/Package/Core.pm
/usr/share/perl5/Excel/Writer/XLSX/Package/Packager.pm
/usr/share/perl5/Excel/Writer/XLSX/Package/Relationships.pm
/usr/share/perl5/Excel/Writer/XLSX/Package/SharedStrings.pm
/usr/share/perl5/Excel/Writer/XLSX/Package/Styles.pm
/usr/share/perl5/Excel/Writer/XLSX/Package/Table.pm
/usr/share/perl5/Excel/Writer/XLSX/Package/Theme.pm
/usr/share/perl5/Excel/Writer/XLSX/Package/VML.pm
/usr/share/perl5/Excel/Writer/XLSX/Package/XMLwriter.pm
/usr/share/perl5/Excel/Writer/XLSX/Shape.pm
/usr/share/perl5/Excel/Writer/XLSX/Utility.pm
/usr/share/perl5/Excel/Writer/XLSX/Workbook.pm
/usr/share/perl5/Excel/Writer/XLSX/Worksheet.pm