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This is a well-worn approach in which malware distributors find vulnerable blogs or other sites with high Google search-engine rankings, compromise them, and add a redirection mechanism that bounces through a number of affiliate links – ultimately redirecting users to a fake Flash Player landing page. In the latest campaign, to lure victims in, its operators are using poisoned search results – specifically within Google Search. Previous versions also acted as installers for second-stage malware, and spread via fake apps. Shalyer last year made its way to the top of the heap when it comes to Mac’s most common threat - It made up 29 percent of all attacks on macOS devices in Kaspersky’s telemetry for 2019, making it the No.
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“This newly re-engineered malware purports to be a legitimate Flash Player installer, but it has the capability to surreptitiously download and install additional unwanted packages containing adware or spyware,” Long said. The hidden malware can from there lurk on the machine, ready to download any other Mac malware or adware package from a command-and-control (C2) server, whenever the operators feel like it.
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ZIP file, and to hide that within a bash shell script, is a novel idea-and it is also extremely clear evidence that the developers are trying to evade detection by antivirus software,” Long noted. “The developers’ decision to hide the Mac. APP bundle in turn downloads a legitimate, Adobe-signed Flash Player installer, which acts as a cover for the hidden, malicious Mac app operating in the background. For a victim, nothing will seem amiss.Īdding to the verisimilitude, the Mac. This activity happens in a “split second” in order to evade user notice, according to the firm. APP bundle, which the installer places into a hidden temporary folder and then launches, before quitting Terminal.
The bash shell sets about running itself in the Terminal app, where it extracts a self-embedded, password-protected. This app comes with a Flash Player icon and looks like a normal Mac app – but it’s actually a bash shell script. If a user gets past this and follows the instructions, the fake installer app launches.
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Therefore, novice Mac users may not know how to do the Mac equivalent of a right-click, and therefore may not understand how to run the malware installer script.”
“Unlike typical Windows PCs, there is no obvious right-side button on Apple mice and trackpads. But this “may be a bit puzzling to many casual Mac users,” Long pointed out. Oddly, the instructions tell users to first right-click on the Flash Installer and select “Open,” and then to click Open in the resulting dialog box. “After the deceptive Flash Player installer is downloaded and opened on a victim’s Mac, the disk image will mount and display instructions on how to install it,” explained Joshua Long, chief security analyst at Intego, in a posting on Monday. DMG disk image, according to Intego’s analysis. To start with, the masquerading “installer” is downloaded as a. However, it has its own unique characteristics: It takes a crafty road to infection once it’s downloaded, all in the name of evading detection.
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A fresh variant of the Shlayer Mac OSX malware with advanced stealth capabilities has been spotted in the wild, actively using poisoned Google search results in order to find its victims.Īccording to researchers at Intego, the malware, like many malware samples before it, is purporting to be an Adobe Flash Player installer.
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