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Adware.Gexin.4412

Added to the Dr.Web virus database: 2018-11-07

Virus description added:

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) aexcep####.b####.qq.com:8012
  • TCP(HTTP/1.1) and####.b####.qq.com:80
  • UDP(NTP) 1.cn.p####.####.org:123
  • TCP(TLS/1.0) c####.x####.com:443
DNS requests:
  • 1.cn.p####.####.org
  • aexcep####.b####.qq.com
  • and####.b####.qq.com
  • c####.x####.com
  • i####.cn
HTTP POST requests:
  • aexcep####.b####.qq.com:8012/rqd/async
  • and####.b####.qq.com/rqd/async
Modified file system:
Creates the following files:
  • /data/data/####/1541548546336_2269
  • /data/data/####/1541548546393_2269
  • /data/data/####/1541548546475_2269
  • /data/data/####/TDCloudSettingsConfig2840D827B15F20B48C259A34991DAED6.xml
  • /data/data/####/TD_app_pefercen_profile.xml
  • /data/data/####/TDpref_longtime.xml
  • /data/data/####/TDpref_longtime0.xml
  • /data/data/####/TDpref_shorttime.xml
  • /data/data/####/TDpref_shorttime0.xml
  • /data/data/####/TalingDataConfig2840D827B15F20B48C259A34991DAED6.xml
  • /data/data/####/bugly_db_legu-journal
  • /data/data/####/libnfix.so
  • /data/data/####/libshella-2.10.7.1.so
  • /data/data/####/libufix.so
  • /data/data/####/local_crash_lock
  • /data/data/####/mix.dex
  • /data/data/####/native_record_lock
  • /data/data/####/security_info
  • /data/data/####/tdid.xml
  • /data/media/####/.tcookieid
Miscellaneous:
Executes next shell scripts:
  • /system/bin/sh -c getprop ro.aa.romver
  • /system/bin/sh -c getprop ro.board.platform
  • /system/bin/sh -c getprop ro.build.fingerprint
  • /system/bin/sh -c getprop ro.build.nubia.rom.name
  • /system/bin/sh -c getprop ro.build.rom.id
  • /system/bin/sh -c getprop ro.build.tyd.kbstyle_version
  • /system/bin/sh -c getprop ro.build.version.emui
  • /system/bin/sh -c getprop ro.build.version.opporom
  • /system/bin/sh -c getprop ro.gn.gnromvernumber
  • /system/bin/sh -c getprop ro.lenovo.series
  • /system/bin/sh -c getprop ro.lewa.version
  • /system/bin/sh -c getprop ro.meizu.product.model
  • /system/bin/sh -c getprop ro.miui.ui.version.name
  • /system/bin/sh -c getprop ro.vivo.os.build.display.id
  • /system/bin/sh -c type su
  • chmod 700 <Package Folder>/tx_shell/libnfix.so
  • chmod 700 <Package Folder>/tx_shell/libshella-2.10.7.1.so
  • chmod 700 <Package Folder>/tx_shell/libufix.so
  • getprop
  • getprop ro.aa.romver
  • getprop ro.board.platform
  • getprop ro.build.fingerprint
  • getprop ro.build.nubia.rom.name
  • getprop ro.build.rom.id
  • getprop ro.build.tyd.kbstyle_version
  • getprop ro.build.version.opporom
  • getprop ro.gn.gnromvernumber
  • getprop ro.lenovo.series
  • getprop ro.lewa.version
  • getprop ro.meizu.product.model
  • getprop ro.miui.ui.version.name
  • getprop ro.vivo.os.build.display.id
  • getprop ro.yunos.version
  • logcat -d -v threadtime
Loads the following dynamic libraries:
  • Bugly
  • libnfix
  • libshella-2.10.7.1
  • libufix
  • nfix
  • ufix
Uses the following algorithms to encrypt data:
  • AES-GCM-NoPadding
  • DES-CBC-PKCS5Padding
  • RSA-ECB-PKCS1Padding
Uses the following algorithms to decrypt data:
  • AES-GCM-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.).
Displays its own windows over windows of other applications.

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

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  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.

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