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Trojan.MulDrop7.26387

Added to Dr.Web virus database:2017-04-26
Virus description was added:2017-05-11

SHA1:

  • 2ce5f1de24e5ac0d394ce12919343be2bcf9832f

A multi-purpose backdoor for Microsoft Windows that was distributed in social networks as a free license key for commercial anti-virus products. It is a packed tool called Njrat 0.7 Golden By Hassan Amiri (BackDoor.NJRat.1013). The Trojan contains a keylogger as one of the components.

screenshot #drweb

Once the Trojan is launched, it establishes a connection with the command and control (C&C) server and uploads the following data:

  • Serial number of a hard drive;
  • Operating system version;
  • Operating system bitness;
  • Identify the web camera connected to the computer;
  • Computer name;
  • User name;
  • Version of the installed Service Pack;
  • Version of the installed anti-virus.

The Trojan can execute the following commands of cybercriminals:

  • Replace the Windows Desktop wallpaper;
  • Turn off or restart the computer;
  • Output a system message with the specified text on the screen;
  • Swap the functions of mouse keys;
  • Play a specific phrase using a voice synthesizer and speakers;
  • Hide and then restore the Windows taskbar;
  • Open or close the optical disc drive;
  • Turn a display on and off;
  • Open the specified link in a browser;
  • Read, install or remove the specified value of the system registry;
  • Receive a screenshot and send it to the C&C server;
  • Download and launch the specified executable file;
  • Send data collected by the keylogger to the C&C server;
  • Refresh or remove the Trojan’s executable file;

At the command of cybercriminals it can display frightening SWF videos.

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.
  3. If your OS is locked by malware belonging to the Trojan.Winlock family, use our unlocking service. If you failed to find the unlock code, follow the instructions provided in Section 2.
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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.

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