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Profile

Android.Backdoor.685

Added to the Dr.Web virus database: 2018-02-04

Virus description added:

Technical information

Malicious functions:
Executes code of the following detected threats:
  • Android.Backdoor.190.origin
Removes its shortcut from the home screen.
Gains access to the ITelephony private interface.
Modified file system:
Creates the following files:
  • /data/anr/traces.txt
  • /system/app/<Package>
  • /system/bin/.sudd
  • /system/bin/clock_service
  • /system/bin/su4100
  • /system/etc/install-recovery.sh
  • /system/lib/libwatch.so
  • <Package Folder>/annotation.jar
  • <Package Folder>/app_asset/about.png
  • <Package Folder>/app_asset/droid.png
  • <Package Folder>/app_asset/help.png
  • <Package Folder>/app_asset/help2.png
  • <Package Folder>/app_asset/help3.png
  • <Package Folder>/app_asset/help4.png
  • <Package Folder>/app_asset/id.txt
  • <Package Folder>/app_asset/logo.png
  • <Package Folder>/app_asset/splash
  • <Package Folder>/app_bin/busybox_g1
  • <Package Folder>/app_bin/help4.png
  • <Package Folder>/app_bin/su
  • <Package Folder>/app_bin/toor.sh
  • <Package Folder>/app_bin/toor2.sh
  • <Package Folder>/databases/config.db-journal
  • <Package Folder>/files/about.png
  • <Package Folder>/files/daemon.r
  • <Package Folder>/files/daemon.sh
  • <Package Folder>/files/help.png
  • <Package Folder>/files/help2.png
  • <Package Folder>/files/help3.png
  • <Package Folder>/files/help4.png
  • <Package Folder>/files/id.txt
  • <Package Folder>/files/imei.tmp
  • <Package Folder>/files/setting.prop
  • <Package Folder>/files/sys1000.ini
  • <Package Folder>/files/sys101.ini
  • <Package Folder>/files/version.tmp
  • <Package Folder>/shared_prefs/Parameter.xml
Miscellaneous:
Executes next shell scripts:
  • /system/bin/sh <Package Folder>/app_bin/busybox_g1 grep GoogleService
  • /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
  • app_process /system/bin com.android.commands.am.Am startservice -n <Package>/android.app.Application --user 0
  • chmod
  • chmod 666 /system/lib/libwatch.so
  • chmod 6777 /system/app/<Package>
  • chmod 700 <Package Folder>/files/about.png
  • chmod 755 /system/bin/clock_service
  • chmod 755 <Package Folder>/app_bin/busybox_g1
  • chmod 755 <Package Folder>/files/daemon.sh
  • chmod 777 <Package Folder>/files/about.png
  • chmod 7777 /system/bin/.sudd
  • chmod 7777 /system/bin/su4100
  • dd if=/data/app-lib/<Package>-1/libwatch.so of=/system/lib/libwatch.so
  • dd if=/data/app/<Package>-1.apk of=/system/app/<Package>
  • getprop ro.build.version.release
  • mount -o remount system /system
  • mount -o remount,rw /system
  • mv /system/app/<Package> /system/app/<Package>-1.apk
  • ps
  • rm -r /system/app/<Package>
  • 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 &
  • su -c <Package Folder>/app_bin/toor.sh
Loads the following dynamic libraries:
  • watch
Uses elevated priveleges.
Gains access to interfaces of audio/video data writing.
Gains access to geolocation.
Gains access to telephone information (number, imei, etc.).
Gains access to information about APN settings.
Gains access to information about running applications.
Adds tasks to the system scheduler.
Gains access to information about incoming/outgoing calls.
Gains access to information about sent/received SMS messages.

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