/usr/lib/ is in ruby-hitimes 1.2.1-3+b3.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/ruby/
/usr/lib/x86_64-linux-gnu/ruby/vendor_ruby/
/usr/lib/x86_64-linux-gnu/ruby/vendor_ruby/2.3.0/
/usr/lib/x86_64-linux-gnu/ruby/vendor_ruby/2.3.0/hitimes/
/usr/lib/x86_64-linux-gnu/ruby/vendor_ruby/2.3.0/hitimes/2.3/
/usr/lib/x86_64-linux-gnu/ruby/vendor_ruby/2.3.0/hitimes/2.3/hitimes.so
/usr/lib/ruby/
/usr/lib/ruby/vendor_ruby/
/usr/lib/ruby/vendor_ruby/hitimes.rb
/usr/lib/ruby/vendor_ruby/hitimes/
/usr/lib/ruby/vendor_ruby/hitimes/metric.rb
/usr/lib/ruby/vendor_ruby/hitimes/mutexed_stats.rb
/usr/lib/ruby/vendor_ruby/hitimes/paths.rb
/usr/lib/ruby/vendor_ruby/hitimes/stats.rb
/usr/lib/ruby/vendor_ruby/hitimes/timed_metric.rb
/usr/lib/ruby/vendor_ruby/hitimes/timed_value_metric.rb
/usr/lib/ruby/vendor_ruby/hitimes/value_metric.rb
/usr/lib/ruby/vendor_ruby/hitimes/version.rb