The malware was part of the signed installer for CCleaner v5.3 and included code that called back to a command-and-control server as well as a domain-generation algorithm intended to find a new C&C server if the hard-coded IP address of the primary server was lost. Copies of the malicious software installer were distributed to CCleaner users between August 15 and September 12, 2017, using a valid certificate issued to Piriform Ltd by Symantec. This time, the hackers breached Avast's own network, as the company migrated CCleaner to its infrastructure following the 2017 hack. In a blog post this morning, Cisco Talos Intelligence's Edmund Brumaghin, Ross Gibb, Warren Mercer, Matthew Molyett, and Craig Williams reported that Talos had detected the malware during beta testing of a new exploit-detection technology. But today, Avast disclosed a second hack. When successful, they can give malware authors what amounts to the keys to the software developer's kingdom-their compilation tools and signing certificates, as well as access to their workflow for software updates. "Watering hole" attacks, such as the ones used against Facebook, Apple, and Twitter four years ago, are often used to compromise the computers used by software developers. A compromised software update server for Ukraine software vendor M.E.Doc was used to distribute the NotPetya ransomware attack in July. Alison DeNisco Rayome Clifford Colby Rae Hodge. Privacy cleans up cookies, browser history, and temporary internet files from the various browsers on your PC. Tech Services & Software Best Antivirus Software for 2023 Protect your PC from malware and viruses with the best antivirus software around. It removes unused files from your system allowing Windows to run faster. Speed Security The final two categories are only fixable with a Pro subscription to CCleaner, which we'll discuss later. Software updates are increasingly being targeted by distributors of malware, because they provide a virtually unchecked path to infect millions-or even billions-of computers. CCleaner (Crap Cleaner) is a freeware system optimization, privacy, and cleaning tool. By contrast, CCleaner rates 4.5/5 stars with 622 reviews. Avast Endpoint Protection rates 4.4/5 stars with 101 reviews. CCleaner has an extensive and extremely loyal community of tech-savvy users, who need to speed up and optimize their PC and Android experience. CCleaner based on preference data from user reviews. The malware, which was distributed through the update server for the Windows cleanup utility CCleaner, was apparently inserted by an attacker who compromised the software "supply chain" of Piriform, which was acquired by Avast in July. There have been more than 2 billion downloads of CCleaner worldwide, so the potential impact of the malware is huge. Avast-vs-CCleaner Compare Avast Endpoint Protection and CCleaner See this side-by-side comparison of Avast Endpoint Protection vs. However, CCleaner is easier to set up and administer. A software package update for a Windows utility product distributed by antivirus vendor Avast has been spreading an unsavory surprise: a malware package that could allow affected computers to be remotely accessed or controlled with what appears to be a legitimate signing certificate. When assessing the two solutions, reviewers found them equally easy to use.
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