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Adware.Gexin.11791

Added to the Dr.Web virus database: 2019-04-06

Virus description added:

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/1.1) hu####.you####.com:80
  • TCP(TLS/1.0) api.map.b####.com:443
  • TCP(TLS/1.0) loc.map.b####.com:443
DNS requests:
  • api.map.b####.com
  • hu####.you####.com
  • loc.map.b####.com
HTTP POST requests:
  • hu####.you####.com/(unknown)/sys/clientActivation.gy?oh=####&ov=####
  • hu####.you####.com/(unknown)/sys/initApp.gy?oh=####&ov=####
  • hu####.you####.com/sys/log.gy?app=####&log_version=####
File system changes:
Creates the following files:
  • /data/data/####/.jg.ic
  • /data/data/####/account.db
  • /data/data/####/account.db-journal
  • /data/data/####/authStatus_com.youyuan.yhb.xml
  • /data/data/####/authStatus_com.youyuan.yhb;GuardService.xml
  • /data/data/####/authStatus_com.youyuan.yhb;remote.xml
  • /data/data/####/com.youyuan.yhb_dna.xml
  • /data/data/####/com.youyuan.yhb_preferences.xml
  • /data/data/####/com.youyuan.yhb_prefs.xml
  • /data/data/####/du.lock
  • /data/data/####/firll.dat
  • /data/data/####/hst.db
  • /data/data/####/hst.db-journal
  • /data/data/####/libcuid.so
  • /data/data/####/libjiagu748665856.so
  • /data/data/####/multidex.version.xml
  • /data/data/####/p.l
  • /data/data/####/shuzilm.db
  • /data/data/####/ums_agent_online_setting_com.youyuan.yhb.xml
  • /data/data/####/ums_agent_online_setting_com.youyuan.yhb.xml (deleted)
  • /data/data/####/ums_agent_online_setting_com.youyuan.yhb.xml.bak
  • /data/media/####/-223875439-1041998654
  • /data/media/####/._android.dat
  • /data/media/####/._driver.dat
  • /data/media/####/._system.dat
  • /data/media/####/.aio.dat
  • /data/media/####/.cuid
  • /data/media/####/.cuid2
  • /data/media/####/1554557270343
  • /data/media/####/1554557270372
  • /data/media/####/616453885785062757
  • /data/media/####/616453885958191393
  • /data/media/####/_android.dat
  • /data/media/####/_driver.dat
  • /data/media/####/_system.dat
  • /data/media/####/aio.dat
  • /data/media/####/yoh.dat
  • /data/media/####/yol.dat
  • /data/media/####/yom.dat
Miscellaneous:
Executes the following shell scripts:
  • chmod 755 <Package Folder>/.jiagu/libjiagu748665856.so
  • date
  • df
  • id
  • ls /dev/socket
  • ls /system/fonts
  • mkdir -p <SD-Card>/../../../../../..<SD-Card>/Android/Data/System/local/
  • ps
  • service call iphonesubinfo 1
  • sh -c cat
  • sh -c cat /proc/meminfo
  • sh -c cat /proc/sys/kernel/osrelease
  • sh -c cat /proc/sys/kernel/random/boot_id
  • sh -c cat /proc/sys/kernel/random/uuid
  • sh -c cat /sys/block/mmcblk0/device/cid
  • sh -c cat /sys/class/net/eth0/address
  • sh -c cat /sys/class/net/eth1/address
  • sh -c cat /sys/class/net/eth2/address
  • sh -c cat <SD-Card>/../../../../../..<SD-Card>/._android.dat
  • sh -c cat <SD-Card>/../../../../../..<SD-Card>/._driver.dat
  • sh -c cat <SD-Card>/../../../../../..<SD-Card>/._system.dat
  • sh -c cat <SD-Card>/../../../../../..<SD-Card>/.aio.dat
  • sh -c cat <SD-Card>/../../../../../..<SD-Card>/Android/Data/System/local/_driver.dat
  • sh -c cat <SD-Card>/../../../../../..<SD-Card>/Android/Data/System/local/_system.dat
  • sh -c cat <SD-Card>/../../../../../..<SD-Card>/Android/Data/System/local/aio.dat
  • sh -c cd /proc/;cat cpuinfo
  • sh -c cd /proc/net/ && cat arp
  • sh -c cd /proc/self/;cat status
  • sh -c cd /sys/class/net/eth0/ && cat address
  • sh -c cd /sys/class/net/wlan0/ && cat address
  • sh -c echo MzIzQ0E2OEE5OTU0NDdEQTMwQ0U3NERGOTE4Rjk2RjgwMjA3ODQ6MTcwOURFOkI5REREMg== > <SD-Card>/../../../../../..<SD-Card>/._android.dat
  • sh -c echo MzIzQ0E2OEE5OTU0NDdEQTMwQ0U3NERGOTE4Rjk2RjgwMjA3ODQ6MTcwOURFOkI5REREMg== > <SD-Card>/../../../../../..<SD-Card>/Android/Data/System/local/_android.dat
  • sh -c echo NTU4NkFDQkI1NjY4QTJCQTM4MjcwNTg1NzJDMzRBOURBRjhFNDA6MDFBODJFOkFCQzgzQw== > <SD-Card>/../../../../../..<SD-Card>/._driver.dat
  • sh -c echo NTU4NkFDQkI1NjY4QTJCQTM4MjcwNTg1NzJDMzRBOURBRjhFNDA6MDFBODJFOkFCQzgzQw== > <SD-Card>/../../../../../..<SD-Card>/Android/Data/System/local/_driver.dat
  • sh -c echo QjU4NUVFQTBCMEQ3MkI1Mzg5QjM5ODQ1MzQ1NUNFMDMzQzdBQjU6ODg2Qzc4OjI3RERDMw== > <SD-Card>/../../../../../..<SD-Card>/._system.dat
  • sh -c echo QjU4NUVFQTBCMEQ3MkI1Mzg5QjM5ODQ1MzQ1NUNFMDMzQzdBQjU6ODg2Qzc4OjI3RERDMw== > <SD-Card>/../../../../../..<SD-Card>/Android/Data/System/local/_system.dat
  • sh -c echo RDA0MjUyMjkzNkVGQTIxMTA0QjQ4REI2Q0Y5RUNGNkIxNTU0NTU3Mjcz > <SD-Card>/../../../../../..<SD-Card>/.aio.dat
  • sh -c echo RDA0MjUyMjkzNkVGQTIxMTA0QjQ4REI2Q0Y5RUNGNkIxNTU0NTU3Mjcz > <SD-Card>/../../../../../..<SD-Card>/Android/Data/System/local/aio.dat
Loads the following dynamic libraries:
  • BaiduMapSDK_base_v5_1_0
  • YYDroidJni
  • du
  • libjiagu748665856
  • locSDK7b
Uses the following algorithms to encrypt data:
  • AES-CBC-PKCS5Padding
  • RSA
Uses the following algorithms to decrypt data:
  • AES-CBC-PKCS5Padding
Accesses the ITelephony private interface.
Uses special library to hide executable bytecode.
Gets information about location.
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

  1. 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.
  2. 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.

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

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Download by serial number

  1. 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.
  2. 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.

Find out more about Dr.Web for Android