CCleaner compromised by malware infection
CCleaner, the system maintenance tool purchased by Avast, has been hit by a serious malware infection, according to Cisco Talos.
Would recommend that you uninstall this app if you have it on your computer, or at least make sure you don't have the compromised version.
https://www.forbes.com/sites/thomasbrewster/2017/09/18/ccleaner-cybersecurity-app-infected-with-backdoor/