CCleaner had been targeted by cybercriminals, in order to distribute malware via the CCLeaner installation file. The altered installation file was downloaded by 2.27 million CCleaners worldwide. The first stage of the malware was designed to collect non-sensitive information. The second stage was used to download a second stage binary onto just 40 PCs out of the millions of devices infected with stage one, making it a highly targeted attack. We dont have any evidence that a third stage binary has been downloaded onto the affected computers. However, we have found evidence of activity that could indicate what the intended third stage could have looked like.”]