The company has already updated both the online and downloadable versions of CCleaner. What is Piriform doing to remedy the problem? Piriform says it believes the 32-bit Windows version of CCleaner and version of CCleaner Cloud were modified illicitly before their release to users.Īccording to Avast, the malware attempts to transmit information like computer names, IP addresses, installed software, active running software, network adapter information and more, to a server located in the United States. Which versions of CCleaner have the malware? Regardless, if you’re running any version of CCleaner, you’ll want to ensure you’ve updated to the latest version immediately. But since the free version of the tool doesn’t appear to include automatic updates, it stands to reason that anyone running the free version is significantly more at risk, since these users would need to manually download the update. Am I at risk from malware?Īnyone specifically using the 32-bit Windows version of CCleaner is at risk. “There is no indication or evidence that any additional ‘malware’ has been delivered through the backdoor,” it added. “We believe that these users are safe now as our investigation indicates we were able to disarm the threat before it was able to do any harm,” the company said in a press statement. How many people are at risk?Īvast, the multinational cybersecurity firm that recently bought Piriform, says it believes the compromised software was installed on 2.27 million machines. After investigating further, it determined these versions were modified illicitly before their release to users. Piriform says it first detected a problem on September 12, when it noticed an unknown IP address receiving data from software found in recent versions of the software.

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