Recent findings from CCleaner APT investigation reveal that attackers entered the Piriform network via TeamViewer | Avast Avast Blog April 17, 2018 April 17, 2018 No Comments on Recent findings from CCleaner APT investigation reveal that attackers entered the Piriform network via TeamViewer | Avast Today, I shared new findings from Avast’s continued investigations of the CCleaner APT (Advanced Persistent Threat) at RSA.