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Android.Backdoor.2311

Added to the Dr.Web virus database: 2019-05-23

Virus description added:

Technical information

Malicious functions:
Executes code of the following detected threats:
  • Android.Backdoor.190.origin
Removes app icon from the screen.
Network activity:
Connects to:
  • UDP(DNS) <Google DNS>
  • TCP(HTTP/1.1) gd.a.s####.com:80
  • TCP(TLS/1.0) 1####.217.17.78:443
  • TCP www.r####.net:5000
DNS requests:
  • pv.s####.com
  • www.r####.net
HTTP GET requests:
  • gd.a.s####.com/cityjson?ie=####
File system changes:
Creates the following files:
  • /data/anr/traces.txt
  • /data/data/####/Parameter.xml
  • /data/data/####/about.png
  • /data/data/####/busybox_g1
  • /data/data/####/config.db-journal
  • /data/data/####/daemon.r
  • /data/data/####/daemon.sh
  • /data/data/####/data.41
  • /data/data/####/data.dat
  • /data/data/####/data.dat_d
  • /data/data/####/data0.41
  • /data/data/####/data1.41
  • /data/data/####/data2.41
  • /data/data/####/data3.41
  • /data/data/####/droid.jar
  • /data/data/####/droid.png
  • /data/data/####/droidwall.sh
  • /data/data/####/help.png
  • /data/data/####/help2.png
  • /data/data/####/help3.png
  • /data/data/####/help4.png
  • /data/data/####/i
  • /data/data/####/imei.tmp
  • /data/data/####/iptables_armv5
  • /data/data/####/k
  • /data/data/####/logo.png
  • /data/data/####/setting.prop
  • /data/data/####/setting.prop.tmp
  • /data/data/####/splash
  • /data/data/####/su
  • /data/data/####/sys1000.ini
  • /data/data/####/sys101.ini
  • /data/data/####/sys103.ini
  • /data/data/####/sys105.ini
  • /data/data/####/sys109.ini
  • /data/data/####/sys117.ini
  • /data/data/####/sys118.ini
  • /data/data/####/toor.sh
  • /data/data/####/toor2.sh
  • /data/data/####/version.tmp
  • /system/bin/.sudd
  • /system/bin/clock_service
  • /system/bin/su4100
  • /system/etc/install-recovery.sh
Miscellaneous:
Executes the following shell scripts:
  • /system/bin/sh /system/bin/su4100 -c ls /data
  • /system/bin/sh <Package Folder>/app_bin/busybox_g1 grep GoogleService
  • /system/bin/sh <Package Folder>/app_bin/busybox_g1 tr -d
  • /system/bin/sh <Package Folder>/app_bin/toor.sh
  • /system/bin/sh <Package Folder>/files/daemon.sh
  • app_process /system/bin com.android.commands.am.Am broadcast -a android.intent.action.START_GOOGLE_SERVICE
  • chmod
  • chmod 700 <Package Folder>/files/about.png
  • chmod 755 <Package Folder>/app_bin/busybox_g1
  • chmod 755 <Package Folder>/app_bin/toor.sh
  • chmod 755 <Package Folder>/files/daemon.sh
  • chmod 777 <Package Folder>/app_bin/droidwall.sh
  • getprop ro.build.version.release
  • ps
  • sh
  • sh -c chmod 700 <Package Folder>/files/about.png
  • sh -c chmod 755 <Package Folder>/app_bin/busybox_g1
  • sh -c chmod 755 <Package Folder>/app_bin/busybox_g1;chmod 755 <Package Folder>/app_bin/toor.sh
  • sh -c echo -n > <Package Folder>/files/daemon.r;chmod 755 <Package Folder>/files/daemon.sh;<Package Folder>/files/daemon.sh &
  • sh /system/bin/su4100 -c <Package Folder>/app_bin/droidwall.sh
  • su -c <Package Folder>/app_bin/toor.sh
  • su4100 -c <Package Folder>/app_bin/droidwall.sh
Loads the following dynamic libraries:
  • e
  • watch
Uses elevated priveleges.
Accesses the ITelephony private interface.
Accesses audio/video recording interfaces.
Gets information about location.
Gets information about phone status (number, IMEI, etc.).
Gets information about APN settings.
Gets information about installed apps.
Gets information about running apps.
Adds tasks to the system scheduler.
Gets information about incoming/outgoing calls.
Gets information about sent/received SMS.

Curing recommendations


Android

  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