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Android.Xiny.683

Added to the Dr.Web virus database: 2018-01-25

Virus description added: 2018-01-25

Technical information

Malicious functions:

Executes code of the following detected threats:

Android.Click.219.origin
Android.Xiny.220.origin

Network activity:

Connecting to:

UDP(DNS) <Google DNS>
TCP(HTTP/1.1) adv.google-####.com:80
TCP(HTTP/1.1) url.google-####.com:10000
TCP(HTTP/1.1) f####.cdn.1####.com:80
TCP(HTTP/1.1) na####.sno####.1####.com:8111
TCP(HTTP/1.1) sty.zk####.com:80
TCP(HTTP/1.1) ud.zk####.com:80
TCP(TLS/1.0) a####.k####.a####.top:7078

DNS requests:

a####.k####.a####.top
adv.google-####.com
f####.cdn.1####.com
na####.sno####.1####.com
sty.zk####.com
sub.zk####.com
ud.zk####.com
url.gmsce####.org
url.google-####.com

HTTP GET requests:

f####.cdn.1####.com/20180123202226-nativebd151

HTTP POST requests:

adv.google-####.com/mob/chk
na####.sno####.1####.com:8111/native/api/v1/update
na####.sno####.1####.com:8111/native/sdk/api/ad/client_action
na####.sno####.1####.com:8111/native/sdk/api/regclient
sty.zk####.com/api/v1/sub/offline?sid=####
sty.zk####.com/cc/v1/api?sid=####
ud.zk####.com/stat?sid=####
url.google-####.com:10000/adv_url_v1/mediation
url.google-####.com:10000/mediation

Modified file system:

Creates the following files:

<Package Folder>/app_osdk/adflash_shell.jar
<Package Folder>/app_osdk/t.zip
<Package Folder>/databases/webview.db-journal
<Package Folder>/files/####/ad_native_client_action_log
<Package Folder>/files/####/ad_native_client_action_log-journal
<Package Folder>/files/adflashcore.jar
<Package Folder>/files/system.jar
<Package Folder>/files/system.png
<Package Folder>/files/t.jar
<Package Folder>/shared_prefs/<Package>_preferences.xml
<Package Folder>/shared_prefs/AdvertDomain20171130.xml
<Package Folder>/shared_prefs/AdvertReport20171130.xml
<Package Folder>/shared_prefs/AdvertState20171130.xml
<Package Folder>/shared_prefs/AdvertUnique20171130.xml
<Package Folder>/shared_prefs/DateState.xml
<Package Folder>/shared_prefs/adflash.xml
<Package Folder>/shared_prefs/s_sdk_pro_pref.xml
<Package Folder>/shared_prefs/sharepreference_common_record.xml
<Package Folder>/shared_prefs/sharepreference_url_param.xml
<Package Folder>/xsdatabases/db_s_af.db
<Package Folder>/xsdatabases/db_s_af.db-journal
<SD-Card>/160.010.20180108.01
<SD-Card>/Android/####/.nomedia
<SD-Card>/Android/####/inapp_dev.txt
<SD-Card>/Android/####/s_client.txt
<SD-Card>/Android/####/s_imei.txt
<SD-Card>/ad_native/2017-11-16.txt

Miscellaneous:

Executes next shell scripts:

/system/bin/cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq

Uses the following algorithms to encrypt data:

AES-ECB-PKCS5Padding

Uses the following algorithms to decrypt data:

AES
AES-ECB-PKCS5Padding
DES

Gains access to geolocation.

Gains access to network information.

Gains access to telephone information (number, imei, etc.).

Gains access to information about running applications.

Adds tasks to the system scheduler.

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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