Adware.Gexin.3401

Technical information

Malicious functions:

Executes code of the following detected threats:

Adware.Gexin.2.origin

Gains access to the ITelephony private interface.

Network activity:

Connecting to:

UDP(DNS) <Google DNS>
TCP(HTTP/1.1) and####.b####.qq.com:80
TCP(HTTP/1.1) cloud####.fengkon####.com:80
TCP(HTTP/1.1) f####.fengkon####.com:80
TCP(TLS/1.0) 1####.217.17.46:443
TCP(TLS/1.0) et2-na6####.wagbr####.ali####.####.com:443

DNS requests:

and####.b####.qq.com
cloud####.fengkon####.com
f####.fengkon####.com
log.u####.com

HTTP POST requests:

and####.b####.qq.com/rqd/async?aid=####
cloud####.fengkon####.com/v2/device/conf
f####.fengkon####.com/v2/device/profile

Modified file system:

Creates the following files:

/data/data/####/1004
/data/data/####/Alvin2.xml
/data/data/####/ContextData.xml
/data/data/####/bugly_db_-journal
/data/data/####/com.shumei.xml
/data/data/####/core_info
/data/data/####/crashrecord.xml
/data/data/####/disk_entries_list_image_cache_-18825816.xml
/data/data/####/exchangeIdentity.json
/data/data/####/exid.dat
/data/data/####/i==1.2.0&&1.0.0_1538690387032_envelope.log
/data/data/####/info.xml
/data/data/####/libjiagu-350827701.so
/data/data/####/local_crash_lock
/data/data/####/multidex.version.xml
/data/data/####/native_record_lock
/data/data/####/security_info
/data/data/####/share.db-journal
/data/data/####/tbs_download_config.xml
/data/data/####/tbslock.txt
/data/data/####/tracker.db
/data/data/####/tracker.db-journal
/data/data/####/ua.db
/data/data/####/ua.db-journal
/data/data/####/umeng_common_config.xml
/data/data/####/umeng_common_config.xml.bak
/data/data/####/umeng_common_location.xml
/data/data/####/umeng_general_config.xml
/data/data/####/umeng_it.cache
/data/data/####/umeng_socialize.xml
/data/media/####/.nomedia
/data/media/####/Alvin2.xml
/data/media/####/ContextData.xml
/data/media/####/journal.tmp
/data/media/####/shumei.txt
/data/media/####/tbslog.txt

Miscellaneous:

Executes next shell scripts:

/system/bin/cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq
/system/bin/cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_min_freq
/system/bin/sh -c getprop
/system/bin/sh -c type su
chmod 755 <Package Folder>/.jiagu/libjiagu-350827701.so
getprop
getprop ro.product.cpu.abi
ls /sys/class/thermal

Loads the following dynamic libraries:

Bugly
libjiagu-350827701
smsdk

Uses the following algorithms to encrypt data:

AES-CBC-PKCS5Padding
AES-CBC-PKCS7Padding
AES-GCM-NoPadding
RSA-ECB-PKCS1Padding

Uses the following algorithms to decrypt data:

AES-CBC-PKCS5Padding
AES-CBC-PKCS7Padding
AES-GCM-NoPadding
DES-ECB-NoPadding

Uses special library to hide executable bytecode.

Gains access to geolocation.

Gains access to network information.

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

Gains access to information about incoming/outgoing calls.

Gains access to information about sent/received SMS messages.

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 Dr.Web

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Download on App Store

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

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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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