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Added to the Dr.Web virus database: 2018-02-16

Virus description added:

Technical information

Malicious functions:
Executes code of the following detected threats:
  • Android.SmsBot.439.origin
Removes its shortcut from the home screen.
Intercepts incoming SMS messages and terminates the process of their transmission to handlers of other applications.
Network activity:
Connecting to:
  • UDP(DNS) <Google DNS>
  • TCP(HTTP/1.1)
DNS requests:
HTTP POST requests:
Modified file system:
Creates the following files:
  • <Package Folder>/databases/bugly_db_lejiagu-journal
  • <Package Folder>/files/local_crash_lock
  • <Package Folder>/files/native_record_lock
  • <Package Folder>/files/security_info
  • <Package Folder>/mix.dex
  • <Package Folder>/shared_prefs/config.xml
  • <Package Folder>/shared_prefs/legu_900015015.xml
  • <Package Folder>/tx_shell/
Executes next shell scripts:
  • /system/bin/sh -c getprop ro.board.platform
  • /system/bin/sh -c type su
  • chmod 700 <Package Folder>/tx_shell/
  • getprop ro.board.platform
  • getprop ro.yunos.version
Loads the following dynamic libraries:
  • Bugly
  • libshella-2.4.2
Uses the following algorithms to encrypt data:
  • AES-GCM-NoPadding
  • RSA-ECB-PKCS1Padding
Uses the following algorithms to decrypt data:
  • AES-GCM-NoPadding
Uses administrator priveleges.
Uses special library to hide executable bytecode.
Gains access to telephone information (number, imei, etc.).
Gains access to information about active device administrators.
Displays its own windows over windows of other applications.
Parses information from SMS messages.
Gains access to information about sent/received SMS messages.

Curing recommendations


  1. If the mobile device is operating normally, download and install Dr.Web for Android Light. 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 для Android Light 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