CCleaner hacked – over 2.27 million computers affected

CCleaner1

Although, computer-optimization softwares are supposed to keep your computer running smoothly, this case says alot more different. The company that makes CCleaner, announced recently that their free software was infected with malware.

This malware gathers information like your IP address, computer name, a list of active and installed software on your computer and a list of network adapters, it then sends it to a third-party computer server. Other info such as your credit card numbers, social security number and others seem to be safe.

“Working with US law enforcement, we caused this server to be shut down on the 15th of September before any known harm was done,” said the company in the announcement.

According to Piriform, around 3% (roughly 2.27 million computers) used the infected software. Specifically, computers running 32-bit Windows 10. Versions affected are CCleaner v5.33.6162 or CCleaner Cloud v1.07.3191 for 32-bit Windows PCs. The Android version for phones doesn’t seem to be affected.

Users who updated their software since September 12 wont be affected. This is when the new, uncorrupted version was released. For those who have the Cloud version, it should have automatically updated itself by now to the clean version.

Those who use the non-cloud version you may have the corrupted software. Piriform recommends deleting your current version and downloading a clean version from their website. After download, It is advised to run a check on your system using malware protection software to be sure malicious software isn’t left behind.

Users are expected not to panic though, the company believes that they were able to disarm the malware before any harm was done.


CCleaner, developed by Piriform, is a utility program used to clean potentially unwanted files (including temporary internet files, where malicious programs and code tend to reside) and invalid Windows Registry entries from a computer.

In September 2017, CCleaner v5.33 (Windows) was compromised by cybercriminals who inserted a backdoor into the software, enabling remote access of infected machines. On September 13, Piriform released CCleaner 5.34 and CCleaner Cloud 1.07.3191 that do not contain the malicious code.



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