![]() Of the millions of infected PCs, only a few received the truly nasty second-stage payload that handed the computer over to miscreants. The shutdown happened three days after Israeli security firm Morphisec alerted CCleaner owner Avast to the scandal. ![]() The compromised CCleaner builds, such as v5.33, were distributed from August 2, and CCleaner Cloud from August 11, until August 25, and connected to a command-and-control server, used to orchestrate the malware, until September 15 when the box was taken down. The software gets rid of temporary files that eat up disk space and invalid Windows registry keys. This was absolutely a highly targeted espionage caper, it appears. Answer (1 of 2): CCleaner Malware CCleaner is a utility program designed to delete unwanted files from a computer. ![]() Nearly 2.3 million computers ended up installing the dodgy version of the tool, and 40 – within companies such as Intel, VMware, Samsung, NEC and Sony – were instructed to download malicious code to commandeer the boxes. ![]() The widely used utility, which removes unwanted temporary files and registry keys on Windows machines, was backdoored with malicious code in August, as in, miscreants tampered with the software's downloads to introduce a means to remotely control PCs running the code. VB2017 Avast staffers spoke at the Virus Bulletin International Conference in Madrid, Spain, on Thursday to shed more light on their postmortem of the CCleaner fiasco – and urge developers to protect their software's toolchain and distribution systems from hackers. ![]()
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