For what it is worth, I'd like to report that I updated CCleaner Free with v 5.38.6357 today and ended up with Avast as well.
I use Unchecky which normally unwanted bundled things are not installed and it had never failed me, so I was not paying attention
and may have messed up.
Can someone confirm that Avast came bundled with the above updater and I missed it or if that hack from a few months back has re-surfaced please.