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Android.Packed.53549

Added to the Dr.Web virus database: 2020-07-26

Virus description added: 2020-07-26

Technical information

Malicious functions:

Executes code of the following detected threats:

Android.DownLoader.122.origin
Android.DownLoader.348.origin
Android.DownLoader.396.origin
Android.DownLoader.455.origin

Network activity:

Connects to:

UDP(DNS) <Google DNS>
TCP(HTTP/1.1) ff.t####.com.####.com:80
TCP(HTTP/1.1) f.you####.com:80
TCP k1.yo####.com:7801
TCP p3.i####.com:7803
TCP k1.yo####.com:7802
TCP f.you####.com:7802

DNS requests:

ap.ga####.com
ap1.ga####.com
ap2.ga####.com
api.appgen####.com
f.you####.com
ff.t####.com
int.d####.s####.####.cn
k1.yo####.com
p1.i####.com
p2.i####.com
p3.i####.com
s1.u####.com
www.androi####.com

HTTP GET requests:

f.you####.com/cdn?id=####
ff.t####.com.####.com/d/44z6.png

File system changes:

Creates the following files:

/data/data/####/.md5
/data/data/####/.sec_version
/data/data/####/1595760687333q.dex
/data/data/####/1595760688004u.dex
/data/data/####/1595760688427cu.dex
/data/data/####/classes.dex
/data/data/####/classes.jar
/data/data/####/com.fmwl.sfzxxcx
/data/data/####/com.fmwl.sfzxxcx.art
/data/data/####/com.fmwl.sfzxxcx_preferences.xml
/data/data/####/container.apk
/data/data/####/container.dex
/data/data/####/container.pre_global_config
/data/data/####/dbmOPF
/data/data/####/dbmOPF-journal
/data/data/####/device_id.xml.xml
/data/data/####/fcut_appInfo_pre.xml
/data/data/####/fcut_conf_pre.xml
/data/data/####/libcpu
/data/data/####/libsecexe.x86.so
/data/data/####/libsecmain.x86.so
/data/data/####/libsecpreload.x86.so
/data/data/####/webview.db
/data/data/####/webview.db-journal
/data/data/####/yo_download.db
/data/data/####/yo_download.db-journal
/data/data/####/yo_fac_pre.xml
/data/data/####/yo_fconf_pre.xml
/data/data/####/yo_finfo_pre.xml
/data/data/####/yoappInfo_pre.xml
/data/data/####/yoappInfo_pre.xml.bak (deleted)
/data/data/####/yoconf_pre.xml
/data/data/####/yop_download.db
/data/data/####/yop_download.db-journal
/data/data/####/yotrategy_pre.xml
/data/media/####/1595760687333q.jar
/data/media/####/1595760688004u.jar
/data/media/####/1595760688427cu.jar
/data/media/####/44z6.png.data

Miscellaneous:

Executes the following shell scripts:

<Package> <Package> -1829446472 0 /data/app/<Package>-1.apk 41 <Package> 50 51
<Package> <Package> -1829446472 0 /data/app/<Package>-1.apk 46 <Package> 55 56
chmod 755 <Package Folder>/.cache/<Package>
chmod 755 <Package Folder>/.cache/<Package>.art
chmod 775 <Package Folder>/app_bangcleplugin/libcpu
getprop ro.product.cpu.abi
sh -c <Package Folder>/app_bangcleplugin/libcpu /storage/emulated/0/.732c2ff4-8242-3b10-81d6-23262f019c28 18 1 <Package>
sh -c chmod 775 <Package Folder>/app_bangcleplugin/libcpu

Loads the following dynamic libraries:

libsecexe.x86

Uses the following algorithms to encrypt data:

DES-CBC-PKCS5Padding

Uses special library to hide executable bytecode.

Gets information about network.

Gets information about phone status (number, IMEI, etc.).

Gets information about installed apps.

Gets information about running apps.

Adds tasks to the system scheduler.

Displays its own windows over windows of other apps.

Curing recommendations

Android

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.
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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