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Adware.Gexin.20201

Added to the Dr.Web virus database: 2020-04-30

Virus description added: 2020-04-30

Technical information

Malicious functions:

Executes code of the following detected threats:

Adware.Gexin.2.origin

Network activity:

Connects to:

UDP(DNS) <Google DNS>
TCP(HTTP/1.0) tcms-a####.wan####.ta####.com:443
TCP(HTTP/1.0) tcms-a####.wan####.ta####.com:80
TCP(HTTP/1.1) sdk-ope####.g####.com:80
TCP(HTTP/1.1) d####.c####.l####.####.com:80
TCP(HTTP/1.1) sdk.o####.amp.####.com:80
TCP(HTTP/1.1) c-h####.g####.com:80
TCP(HTTP/1.1) ti####.c####.l####.####.com:80
TCP sdk.o####.t####.####.com:5224
TCP cm-1####.g####.com:5225
TCP i####.wan####.ta####.com:443

DNS requests:

7j####.c####.z0.####.com
c-h####.g####.com
cm-1####.g####.com
cm-1####.g####.com
cm-1####.g####.com
hotp####.wan####.ta####.com
i####.wan####.ta####.com
sdk-ope####.g####.com
sdk.c####.g####.com
sdk.o####.amp.####.com
sdk.o####.t####.####.com
sdk.o####.t####.####.com
sdk.o####.t####.####.com
sdk.o####.t####.####.net
tcms-a####.wan####.ta####.com

HTTP GET requests:

d####.c####.l####.####.com/config/hzv9.conf
tcms-a####.wan####.ta####.com:443/imlogingw/tcp60login?devid=####&ver=####
ti####.c####.l####.####.com/tdata_imh016

HTTP POST requests:

c-h####.g####.com/api.php?format=####&t=####
sdk-ope####.g####.com/api.php?format=####&t=####
sdk.o####.amp.####.com/api.htm?format=####&t=####

File system changes:

Creates the following files:

/data/data/####/.jg.ic
/data/data/####/04-30_11_10_com.ckjr.context_2152
/data/data/####/04-30_11_10_com.ckjr.context_2199
/data/data/####/04-30_11_10_com.ckjr.context_TcmsService_2273
/data/data/####/1c383f2eef0f0bd5cc1420b25c62e2cd261d767326d052f....0.tmp
/data/data/####/MultiDex.lock
/data/data/####/cc.db
/data/data/####/cc.db-journal
/data/data/####/com.ckjr.context_preferences.xml
/data/data/####/getui_sp.xml
/data/data/####/init.pid
/data/data/####/init_c1.pid
/data/data/####/journal.tmp
/data/data/####/libjiagu2143526148.so
/data/data/####/lock_dm
/data/data/####/lock_gt
/data/data/####/mobclick_agent_cached_com.ckjr.context375180717
/data/data/####/multidex.version.xml
/data/data/####/notification_config.xml
/data/data/####/push.pid
/data/data/####/pushsdk.db-journal
/data/data/####/run.pid
/data/data/####/tcms_istied.xml
/data/data/####/tcms_setting_sp.xml
/data/data/####/tray.db-journal
/data/data/####/umeng_general_config.xml
/data/data/####/umeng_general_config.xml.bak
/data/media/####/2_20200430_r
/data/media/####/app.db
/data/media/####/com.ckjr.context.bin
/data/media/####/com.ckjr.context.db
/data/media/####/com.igexin.sdk.deviceId.db

Miscellaneous:

Executes the following shell scripts:

chmod 755 <Package Folder>/.jiagu/libjiagu2143526148.so
getprop ro.product.cpu.abi
sh

Loads the following dynamic libraries:

getuiext2
inet.2.0
libjiagu2143526148
tqb

Uses the following algorithms to encrypt data:

AES-ECB-PKCS5Padding
RSA-NONE-OAEPWithSHA1AndMGF1Padding
RSA-NONE-PKCS1Padding

Uses the following algorithms to decrypt data:

AES-ECB-NoPadding
AES-ECB-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

If the operating system (OS) can be loaded (either normally or in safe mode), download Dr.Web Security Space and run a full scan of your computer and removable media you use. More about Dr.Web Security Space.
If you cannot boot the OS, change the BIOS settings to boot your system from a CD or USB drive. Download the image of the emergency system repair disk Dr.Web® LiveDisk , mount it on a USB drive or burn it to a CD/DVD. After booting up with this media, run a full scan and cure all the detected threats.

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Use Dr.Web Anti-virus for macOS to run a full scan of your Mac.

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Download by serial number

Download on App Store

After booting up, run a full scan of all disk partitions with Dr.Web Anti-virus for Linux.

Download Dr.Web

Download by serial number

If the mobile device is operating normally, download and install Dr.Web for Android. 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 for Android 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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