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Android.Packed.28361

Added to the Dr.Web virus database: 2017-08-31

Virus description added:

Technical information

Malicious functions:
Executes code of the following detected threats:
  • Android.Locker.441.origin
Network activity:
Connecting to:
  • UDP(DNS) <Google DNS>
  • TCP(GCM) <Google Host>
  • TCP(HTTP/1.1) app.ifen####.com:80
  • TCP(HTTP/1.1) a####.u####.com:80
  • TCP(HTTP/1.1) api.mobilea####.com.####.com:80
  • TCP(HTTP/1.1) a.appj####.com:80
DNS requests:
  • a####.u####.com
  • a.appj####.com
  • api.mobilea####.com
  • app.ifen####.com
  • lo####.mobilea####.com
HTTP GET requests:
  • api.mobilea####.com.####.com/api/GetMessage?platforms=####&imie=####&isf...
  • api.mobilea####.com.####.com/api/Update?AppId=####&PackageName=####&Vers...
  • app.ifen####.com/api/GetXJLVersion?ChannelName=####&DeviceType=####&IMEI...
HTTP POST requests:
  • a.appj####.com/ad-service/ad/mark
  • a.appj####.com/jiagu/check/upgrade
Modified file system:
Creates the following files:
  • /data/<Package>/####/MESSAGE.db
  • /data/anr/traces.txt
  • /system/app/key.bat
  • /system/app/time.apk
  • /system/lib/libStarEngine.so
  • <Package Folder>/.jiagu/libjiagu.so
  • <Package Folder>/app_a/k.bat
  • <Package Folder>/app_a/key.bat
  • <Package Folder>/app_a/libStarEngine.so
  • <Package Folder>/app_jgls/.log.lock
  • <Package Folder>/app_jgls/.log.ls
  • <Package Folder>/databases/MESSAGE.db
  • <Package Folder>/databases/MESSAGE.db-journal
  • <Package Folder>/databases/webview.db
  • <Package Folder>/databases/webview.db-journal
  • <Package Folder>/files/####/.jg.ic
  • <Package Folder>/files/.imprint
  • <Package Folder>/files/elfinject
  • <Package Folder>/files/port
  • <Package Folder>/files/scanmem
  • <Package Folder>/files/script.atc
  • <Package Folder>/files/script.cfg
  • <Package Folder>/files/script.lc
  • <Package Folder>/files/script.prop
  • <Package Folder>/files/script.rtd
  • <Package Folder>/files/script.ui
  • <Package Folder>/files/start_eventsrv
  • <Package Folder>/files/umeng_it.cache
  • <Package Folder>/shared_prefs/CookiePrefsFile.xml
  • <Package Folder>/shared_prefs/jg_app_update_settings_random.xml
  • <Package Folder>/shared_prefs/mobclick_agent_online_setting_<Package>.xml
  • <Package Folder>/shared_prefs/umeng_general_config.xml
  • <Package Folder>/shared_prefs/umeng_general_config.xml.bak
Miscellaneous:
Executes next shell scripts:
  • /system/bin/sh
  • /system/bin/sh <Package Folder>/files/start_eventsrv
  • chmod 000 /system/app/Launcher2.apk
  • chmod 0644 /system/app/time.apk
  • chmod 0644 /system/lib/libStarEngine.so
  • chmod 0777 /system/app/key.bat
  • chmod 666 /dev/input/event0 /dev/input/event1 /dev/input/event2 /dev/input/event3 /dev/input/event4 /dev/input/event5 /dev/input/event6 /dev/input/mice /dev/input/mouse0
  • chmod 755 <Package Folder>/.jiagu/libjiagu.so
  • chmod 755 <Package Folder>/files/start_eventsrv
  • cp <Package Folder>/app_a/key.bat /system/app/
  • cp <Package Folder>/app_a/libStarEngine.so /system/lib/
  • ls -l /system/bin/su
  • ls -l /system/xbin/su
  • ls data
  • mount -o rw,remount /system
  • mv /system/app/key.bat /system/app/time.apk
  • sh
  • su
Loads the following dynamic libraries:
  • libjiagu
  • mqm
Uses the following algorithms to decrypt data:
  • AES
Uses elevated priveleges.
Uses special library to hide executable bytecode.
Gains access to network information.
Gains access to telephone information (number, imei, etc.).
Displays its own windows over windows of other applications.

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.

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