The company is moving the product build to a more secure and robust infrastructure to prevent any such future security incidents. None of the Android devices running the software were compromised. It appears that users with 32 bit Windows machines were specifically affected. Piriform urged all CCleaner users to update to the new version, while themselves automatically updating all users of CCleaner Cloud. Most of which seems to have been targeting technology giants like Samsung, Intel, and VMware. Of these 2.27 million users, 40 received a second-stage payload. Piriform worked with law enforcement officials to shut down the server and claimed that over 2.27 million users were affected. The malware in question was collecting data such as the computer name, IP address, list of installed software, list of active software and list of network adapters from infected machines and transmitting this information to an unknown third party server in USA. These versions of the software had been modified illegally before it was released to the public. On September 12th, 2017, Piriform revealed in a blog post that CCleaner version and CCleaner Cloud version had been compromised. If you are unsure of some of the options, especially the ones pertaining to the registry settings, it’s best left untouched. Using CCleaner is not necessarily a bad idea, but most of its functionalities are redundant, given they are already built into the Windows operating system.

Since these tools are already built into Windows, most users don’t exploit these functionalities anyway. CCleaner also provides a startup manager, an uninstaller, and a System restore interface. Also, CCleaner cleans up files that have been created by background processes (like cookies and cache) which users do not manually delete. Since anyone with access to these files gains immense information about the user, deleting these files is the easiest way to prevent this.

As such, CCleaner can assist in getting rid of cache files and browser cookies which store private data. This is hardly a concern nowadays, given that hard disks come cheaper with greater storage capabilities. The first use case this definition brings to mind is freeing up memory from the hard disk. CCleaner is a utility program which helps in getting rid of potentially unwanted files and invalid Windows registry entries from a computer.

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