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Trojan.BPlug.1074

Added to the Dr.Web virus database: 2016-04-22

Virus description added:

SHA1:

  • 71b1c32f89dcd3c2cbdb9f0e50685025f6f5f59b
  • 75c24cc6bbfa89f5f4a622913f762b76dd7a24af

A malicious plug-in for Google Chrome that consists of three scripts written in JavaScript. If the user whose browser already contains this extension logs on to Facebook, this plug-in checks for “location.hostname”. If the value is not facebook.com, the script is terminated.

The Trojan retrieves uid from cookies and CSRF token from the social network webpage. Every 10 microseconds, it removes blocks with the following classes from the Facebook web interface:

  • _5ce
  • uiToggle wrap
  • logoutMenu
  • uiPopover
  • UFICommentCloseButton

Then the Trojan creates a group named randomly. Using the group ID, the victim’s profile photo and the address of the webpage retrieved from a configuration file, the Trojan generates a “share a link” post and publishes it on the wall in specified intervals. What is more, in this post, the Trojan mentions all the victim’s friends on Facebook so this message is published on their walls too.

If the user follows the specified link, they are redirected to some webpage whose appearance is identical to the Facebook web design. Yet, if another website is used to follow this link, the user is redirected to a blank webpage. The webpage contains an allegedly standard video player. If the victim uses Chrome and tries to watch the video, they are prompted to download and install a browser plug-in. Trojan.BPlug.1074 can use this method to spread either its own copy or other plug-ins for Google Chrome.

screen #drweb

News about the Trojan

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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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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