Williams said that Talos detected the issue at an early stage, when the hackers appeared to be collecting information from infected machines, rather than forcing them to install new programs. CCleaner does not update automatically, so each person who has installed the problematic version will need to delete it and install a fresh version, he said. The nature of the attack code suggests that the hacker won access to a machine used to create CCleaner, Williams said. A new, uncompromised version of CCleaner was released the same day and a clean version of CCleaner Cloud was released on Sept. Piriform said that Avast, its new parent company, had uncovered the attacks on Sept. It advised users of CCleaner v and CCleaner Cloud v to download new versions.Ī spokeswoman said that 2.27 million users had downloaded the August version of CCleaner while only 5,000 users had installed the compromised version of CCleaner Cloud. In a blog post, Piriform confirmed that two programs released in August were compromised. “ There is nothing a user could have noticed,” Williams said, noting that the optimisation software had a proper digital certificate, which means that other computers automatically trust the program. Talos researcher Craig Williams said it was a sophisticated attack because it penetrated an established and trusted supplier in a manner similar to June’s “NotPetya” attack on companies that downloaded infected Ukrainian accounting software. At the time of the acquisition, the company said 130 million people used CCleaner.Ī version of CCleaner downloaded in August included remote administration tools that tried to connect to several unregistered web pages, presumably to download additional unauthorised programs, security researchers at Cisco’s Talos unit said. CCleaner is the main product made by London’s Piriform, which was bought in July by Prague-based Avast, one of the world’s largest computer security vendors. It cleans up junk programs and advertising cookies to speed up devices. The malicious program was slipped into legitimate software called CCleaner, which is downloaded for personal computers and Android phones as often as five million times a week. We'll ask for permission to access this data before using it.San Francisco - Hackers broke into British company Piriform’s free software for optimising computer performance last month potentially allowing them to control the devices of more than two million users, the company and independent researchers said on Monday. Fast, compact and efficient, with low RAM and CPU usageĭisclaimer: Certain battery profiles are automatically triggered based on your device's location, which requires access to location data we'll be using in the background.Simple, intuitive user interface which is easy to navigate.Optimize your Android in just a few clicks.Check out your battery levels and temperature.Master your RAM and internal storage space.Optimize file sizes with Low, Moderate, High, and Aggressive file compression, and move originals into cloud storage.Find and remove similar, old, and poor quality (too bright, dark, or unfocused) photos.Determine the impact of individual apps on your device.Set profiles to auto-adjust battery usage for home, work, or car.App Hibernation feature, to stop apps from running in the background until you manually open them.Quickly stop running tasks and clean memory with Task Killer (RAM Booster).Clear junk, such as obsolete and residual files.Quickly and easily uninstall multiple unwanted applications.Analyze and optimize valuable storage space.Clean application cache, download folders, browser history, clipboard content and more.Speed up your phone and clean junk safely.Quickly and easily remove junk, reclaim space, clean RAM, monitor your system and more, and truly master your device. Is your Android phone or tablet full of junk and running slowly?Ĭlean, optimize and boost the performance of your device with CCleaner for Android!īrought to you from the makers of the world’s most popular PC and Mac cleaning software, CCleaner for Android is the ultimate Android optimizer.
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