At that, they also registered 478,099 unique IP addresses that requested these servers. This script is responsible for display of advertisements in the browser window and collects the user’s Web search queries of several search engines.ĭoctor Web specialists found that 1,735,730 malicious programs were downloaded from the cybercriminals’ servers. Then it launches a special proxy server that is used to inject a JavaScript script in all opened webpages.
Once .7 is on the computer, the very first thing it does is create a new user account, which is not displayed in the OS X Welcome dialog. And, finally, the Trojan downloads and installs another malicious program- .7. Web detects this plug-in as an unwanted application named .1.
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In addition, applying this script, .4 can download and install a search plug-in for Safari, Chrome, and Firefox. This script is used to set another default search engine-the Trovi server. Among them, we can mention the .4 Trojan and such dangerous and unwanted applications as MacKeeper (), ZipCloud (), and .Īfter .4 is installed on the infected computer, the Trojan downloads a script from the server. At that, the Trojan is set as if the user themselves checked all offered components. However, in fact, it is not the case because the installer skips this step and moves to the next stage prompting the user to specify the installation folder. This dialog usually prompts the user to choose necessary modules from the list. When they click “Continue”, .2 should display a list of components that the user can install in addition to the desired application. Once the installer is launched, the user sees a standard greeting on the screen.
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Users can download it from different websites offering free OS X software. It is spread masquerading as various utilities or software-for instance, as the Nice Player application. The Trojans begin their malicious activity with an application installer that Dr.Web detects as .2. In March, Doctor Web security researchers registered new adware Trojans that belong to the family. Today’s malicious programs for OS X are mainly designed to display annoying advertisements in the browser window. Nevertheless, cybercriminals are still interested in targeting Mac owners. Malware programs for Apple computers are not as widely spread as Trojans for Windows and Android.
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