One of the most popular PC maintenance and cleaning utilities used by PC and Mac lovers alike may have a nasty surprise hidden in it's code. Which is very bad news because CCleaner has been downloaded more than 2 billion times according to Avast.
Cisco Talos described it, "the legitimate signed version of CCleaner 5.33. . .also contained a multi-stage malware payload that rode on top of the installation of CCleaner." This may affect almost 2.3 million users.
But don't loose hope. The malicious code only seems to affect
1. Users running 32-bit version of the application
2. Users running version 5.33.6162 of CCleaner or 1.07.3191 of CCleaner Cloud.
So how can you tell?
Open up CCleaner and look at the version number right under the CCleaner Free text in the upper left corner of the screen.
if that version is before version 5.33.6162, then you are not affected, and you should manually download the latest version now.
If you do have version 5.33.6162, then the best thing to do is to a system restore before August 15th. Also run an anti-virus against your machine like Malwarebytes.