Hackers hid malware in CCleaner antivirus software

Hackers have successfully breached CCleaner’s security to inject malware into the antivirus app and distribute it to million of users. Security researchers at Cisco Talos discovered that download servers used by Avast (the company that owns CCleaner) were compromised to distribute malware inside CCleaner. “For a period of time, the legitimate signed version of CCleaner 5.33 being distributed by Avast also contained a multi-stage malware payload that rode on top of the installation of