CCleaner accidentally delivered malware to users PCs for a month by Michael Allison 1 min ago The popular system cleaning app, CCleaner was compromised by currently unknown hackers for over a month in what is known as a supply chain attack. In this time period, the app was used to deliver malware to the computers of unsuspecting PC users who would install the app and infect their PCs in the process This infiltration was discovered by the security research firm Talos Intelligence, who notified Avast once they understood the scope of the attack.”Talos recently observed a case where the download servers used by software vendor to distribute a legitimate software package were leveraged to deliver malware to unsuspecting victims.” Talos researchers explained in a blog post,  “For a period of time, the legitimate signed version of CCleaner 5.33 being distributed by Avast also contained a multi-stage malware payload that rode on top of the installation of CCleaner.

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