Please validate the update to your CCleaner installations immediately.  An automatic patch was distributed to disarm the threat, but in some cases, internal security controls may have prevented distribution.

https://www.infosecurity-magazine.com/news/hackers-inserted-malware-popular/

https://blog.knowbe4.com/the-ccleaner-app-designed-for-good-cyber-hygiene-was-itself-infected-with-a-backdoor