Android.Backdoor.685

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

Virus description added: 2018-02-04

Malicious functions:

Executes code of the following detected threats:

Removes its shortcut from the home screen.

Gains access to the ITelephony private interface.

Modified file system:

Creates the following files:

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:

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.