I've decided to try out Defender, prompted at least partly because I think one of my sites has been hacked. I've attached two files which I found in /wp-content.
There are lots more files like this in /wp-content/uploads and /wp-content/uploads/sites.
I've installed Defender, run a scan, and Defender has told me:
"0 issues found. Congratulations! Everything is just fine."
It's just not looking fine from my perspective.
Happily, this site is currently running from WP Engine, so I've asked those folks to look into this and clean up if they need to.
Just wondered if you had any response to this?