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Added to the Dr.Web virus database: 2015-07-16

Virus description added:

SHA1: db7309d40faa32fb8c40b66659155ad3bedb009d

A Trojan written in JavaScript and implemented as a plug-in for Mozilla Firefox. It is distributed under the name of NetFilterPro and is presented as “additional security for safe browsing experience”. The Trojan consists of three JS files. The file responsible for performing main malicious functions is encrypted. Other two files serve the purpose of injecting the first file into webpages.

The main objective of this malicious program is to embed arbitrary content into webpages loaded in browser windows. The Trojan has a list of about 200 website addresses hard-coded in his body.

The malicious program can imitate mouse clicks of Megafon (“Мегафон”) and Beeline (“Билайн”) clients to confirm various subscriptions. If the user opens webpages of Yandex (“Яндекс”), Youtube or of such social networking websites as Vkontakte (“ВКонтакте”), Odnoklassniki (“Одноклассники”), and Facebook in the browser window, the Trojan will download a corresponding script from the remote server and execute it. As a result, the user will be redirected to some file-sharing resource employed to generate income by means of paid subscriptions. Moreover, when the victim runs a search using one of the popular search engines, the Trojan processes results and, based on them, embeds advertising banners into webpages whose addresses are displayed. To Facebook webpages, this malicious program adds an iframe element (in order to set internal variables), which allows Trojan.Ormes.186 to automatically “like” specified webpages.

If the user opens a webpage of an online casino whose address is stored in the Trojan's body, such a compromised resource will offer to download an application for a social networking website automatically redirecting the user to the Internet resource with the application. Once the victim finds themselves on that webpage, Trojan.Ormes.186 will imitate a click to confirm installation. Thus, the application will be installed without user intervention.

Curing recommendations

  1. If the operating system (OS) can be loaded (either normally or in safe mode), download Dr.Web Security Space and run a full scan of your computer and removable media you use. More about Dr.Web Security Space.
  2. If you cannot boot the OS, change the BIOS settings to boot your system from a CD or USB drive. Download the image of the emergency system repair disk Dr.Web® LiveDisk , mount it on a USB drive or burn it to a CD/DVD. After booting up with this media, run a full scan and cure all the detected threats.
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Use Dr.Web Anti-virus for macOS to run a full scan of your Mac.

After booting up, run a full scan of all disk partitions with Dr.Web Anti-virus for Linux.

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  1. If the mobile device is operating normally, download and install Dr.Web for Android. Run a full system scan and follow recommendations to neutralize the detected threats.
  2. If the mobile device has been locked by Android.Locker ransomware (the message on the screen tells you that you have broken some law or demands a set ransom amount; or you will see some other announcement that prevents you from using the handheld normally), do the following:
    • Load your smartphone or tablet in the safe mode (depending on the operating system version and specifications of the particular mobile device involved, this procedure can be performed in various ways; seek clarification from the user guide that was shipped with the device, or contact its manufacturer);
    • Once you have activated safe mode, install the Dr.Web for Android onto the infected handheld and run a full scan of the system; follow the steps recommended for neutralizing the threats that have been detected;
    • Switch off your device and turn it on as normal.

Find out more about Dr.Web for Android

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