/usr/lib/ruby/vendor_ruby/ is in ruby-fog-atmos 0.1.0-3.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/ruby/vendor_ruby/fog/
/usr/lib/ruby/vendor_ruby/fog/bin/
/usr/lib/ruby/vendor_ruby/fog/bin/atmos.rb
/usr/lib/ruby/vendor_ruby/fog/storage/
/usr/lib/ruby/vendor_ruby/fog/storage/atmos.rb
/usr/lib/ruby/vendor_ruby/fog/storage/atmos/
/usr/lib/ruby/vendor_ruby/fog/storage/atmos/requests/
/usr/lib/ruby/vendor_ruby/fog/storage/atmos/requests/get_namespace.rb
/usr/lib/ruby/vendor_ruby/fog/storage/atmos/requests/delete_namespace.rb
/usr/lib/ruby/vendor_ruby/fog/storage/atmos/requests/head_namespace.rb
/usr/lib/ruby/vendor_ruby/fog/storage/atmos/requests/put_namespace.rb
/usr/lib/ruby/vendor_ruby/fog/storage/atmos/requests/post_namespace.rb
/usr/lib/ruby/vendor_ruby/fog/storage/atmos/models/
/usr/lib/ruby/vendor_ruby/fog/storage/atmos/models/files.rb
/usr/lib/ruby/vendor_ruby/fog/storage/atmos/models/directory.rb
/usr/lib/ruby/vendor_ruby/fog/storage/atmos/models/directories.rb
/usr/lib/ruby/vendor_ruby/fog/storage/atmos/models/file.rb
/usr/lib/ruby/vendor_ruby/fog/atmos.rb
/usr/lib/ruby/vendor_ruby/fog/atmos/
/usr/lib/ruby/vendor_ruby/fog/atmos/storage.rb
/usr/lib/ruby/vendor_ruby/fog/atmos/version.rb