Hackers have infiltrated servers used by the popular CCleaner software, which is designed to remove unwanted cookies and improve web privacy, and have infected it with malware.
Two billion users have downloaded CCleaner, and its popularity made it an appealing target for hackers. As a result of the server breach, more than 2.27 million users ended up downloading malware.
According to security researchers, "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." The CCleaner owner claims the organization was able to disable the malware before it harmed any user. Tom Warren "Hackers hid malware in CCleaner software," www.theverge.com (Sept. 18, 2017).