Holy Moly! 430 Suspect Files in WP Core

Help, please. This site is only 1 year old. Where did all these extra files come from?

Also, since they are in WP Core and there should only be official WP Core files in there, is it OK to just mass delete these? (After backing up in case it goes blah-hooey.)

SenseofPlacePress.com

Thanks,
Maggie