/usr/ is in ruby-attr-encrypted 1.3.4-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/
/usr/lib/ruby/
/usr/lib/ruby/vendor_ruby/
/usr/lib/ruby/vendor_ruby/attr_encrypted/
/usr/lib/ruby/vendor_ruby/attr_encrypted/adapters/
/usr/lib/ruby/vendor_ruby/attr_encrypted/adapters/sequel.rb
/usr/lib/ruby/vendor_ruby/attr_encrypted/adapters/data_mapper.rb
/usr/lib/ruby/vendor_ruby/attr_encrypted/adapters/active_record.rb
/usr/lib/ruby/vendor_ruby/attr_encrypted/version.rb
/usr/lib/ruby/vendor_ruby/attr_encrypted.rb
/usr/share/
/usr/share/rubygems-integration/
/usr/share/rubygems-integration/all/
/usr/share/rubygems-integration/all/specifications/
/usr/share/rubygems-integration/all/specifications/attr_encrypted-1.3.4.gemspec
/usr/share/doc/
/usr/share/doc/ruby-attr-encrypted/
/usr/share/doc/ruby-attr-encrypted/copyright
/usr/share/doc/ruby-attr-encrypted/changelog.Debian.gz