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Android.RemoteCode.445

Added to the Dr.Web virus database: 2018-05-26

Virus description added: 2018-05-26

Technical information

Malicious functions:

Executes code of the following detected threats:

Android.RemoteCode.155.origin

Network activity:

Connecting to:

UDP(DNS) <Google DNS>
TCP(HTTP/1.1) ads.w####.cn:80
TCP(HTTP/1.1) c####.z####.com:80
TCP(HTTP/1.1) a####.u####.com:80
TCP(HTTP/1.1) wap####.w####.cn.####.net:80
TCP(HTTP/1.1) a.appj####.com:80
TCP(HTTP/1.1) app.w####.cn:80

DNS requests:

a####.u####.com
a.appj####.com
ads.w####.cn
app.w####.cn
c####.z####.com
img.safetys####.mobi
wap####.w####.cn

HTTP GET requests:

ads.w####.cn/action/ad/show?app_id=####&udid=####&imsi=####&net=####&bas...
ads.w####.cn/action/pop_ad/ad?app_id=####&udid=####&imsi=####&net=####&b...
app.w####.cn/action/connect/active?app_id=####&udid=####&imsi=####&net=#...
c####.z####.com/1607/res_g.bin
wap####.w####.cn.####.net/appfile/offer/js/jquery.min.js

HTTP POST requests:

a####.u####.com/app_logs
a.appj####.com/ad-service/ad/mark
a.appj####.com/jiagu/check/upgrade
app.w####.cn/action/user_info

Modified file system:

Creates the following files:

/data/data/####/.engine.apk
/data/data/####/.imprint
/data/data/####/.jg.ic
/data/data/####/.key.apk
/data/data/####/0000
/data/data/####/0001
/data/data/####/0002
/data/data/####/AppSettings.xml
/data/data/####/CacheTime.dat
/data/data/####/ShowAdFlag.xml
/data/data/####/android_pre.xml
/data/data/####/data.xml
/data/data/####/data_0
/data/data/####/data_1
/data/data/####/data_2
/data/data/####/data_3
/data/data/####/f_000001
/data/data/####/gx
/data/data/####/index
/data/data/####/jg_app_update_settings_random.xml
/data/data/####/libcrypt.so
/data/data/####/libjiagu.so
/data/data/####/libloader.so
/data/data/####/shell_pre.xml
/data/data/####/temp.jar
/data/data/####/umeng_general_config.xml
/data/data/####/umeng_it.cache
/data/data/####/webview.db-journal
/data/data/####/webviewCookiesChromium.db-journal
/data/media/####/AppPackage.dat
/data/media/####/CacheTime.dat
/data/media/####/UnPackage.dat
/data/media/####/android
/data/media/####/sys_nicholas.txt

Miscellaneous:

Executes next shell scripts:

cat /proc/version
cat /sys/class/net/wlan0/address
chmod 755 <Package Folder>/files/libjiagu.so
chmod 777 <Package Folder>/files/gxTmp
chmod 777 <Package Folder>/files/gxTmp/gx

Loads the following dynamic libraries:

crypt
libjiagu
libloader

Uses the following algorithms to encrypt data:

DES-CBC-PKCS5Padding

Uses the following algorithms to decrypt data:

AES-ECB-PKCS5Padding
DES
DES-CBC-PKCS5Padding

Uses special library to hide executable bytecode.

Gains access to network information.

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

Gains access to information about installed applications.

Displays its own windows over windows of other applications.

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.

Find out more about Dr.Web for Android

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