Adware.Gexin.6430

Technical information

Malicious functions:

Executes code of the following detected threats:

Adware.Gexin.2.origin

Accesses the ITelephony private interface.

Network activity:

Connects to:

UDP(DNS) <Google DNS>
TCP(HTTP/1.1) aexcep####.b####.qq.com:8011
TCP(HTTP/1.1) c-h####.g####.com:80
TCP(HTTP/1.1) aexcep####.b####.qq.com:8012
TCP(HTTP/1.1) t####.c####.q####.####.com:80
TCP(HTTP/1.1) and####.b####.qq.com:80
TCP(HTTP/1.1) ti####.c####.l####.####.com:80
TCP(HTTP/1.1) sdk.o####.p####.####.com:80
TCP(TLS/1.0) idf.vill####.com:443
TCP(TLS/1.0) et2-na6####.wagbr####.ali####.####.com:443
TCP(TLS/1.0) ali-s####.j####.cn:443
TCP(TLS/1.0) gd-s####.j####.cn:443
TCP(TLS/1.0) t####.j####.cn:443
TCP c####.g####.ig####.com:5224
TCP 1####.202.151.21:7004
TCP sdk.o####.t####.####.com:5224
UDP s.j####.cn:19000

DNS requests:

7j####.c####.z0.####.com
a####.b####.qq.com
aexcep####.b####.qq.com
ali-s####.j####.cn
and####.b####.qq.com
c####.g####.ig####.com
c-h####.g####.com
gd-s####.j####.cn
idf.vill####.com
plb####.u####.com
s.j####.cn
sdk.c####.ig####.com
sdk.o####.p####.####.com
sdk.o####.t####.####.com
sdk.o####.t####.####.com
sdk.o####.t####.####.net
sis.j####.io
t####.j####.cn
u####.u####.com

HTTP GET requests:

t####.c####.q####.####.com/tdata_bca864
t####.c####.q####.####.com/tdata_fyR930
ti####.c####.l####.####.com/config/hz-hzv3.conf

HTTP POST requests:

aexcep####.b####.qq.com:8011/rqd/async
aexcep####.b####.qq.com:8012/rqd/async
and####.b####.qq.com/rqd/async
and####.b####.qq.com/rqd/async?aid=####
c-h####.g####.com/api.php?format=####&t=####
sdk.o####.p####.####.com/api.php?format=####&t=####

File system changes:

Creates the following files:

/data/data/####/.imprint
/data/data/####/1004
/data/data/####/341fa6f3-947d-4e5d-8bc3-c0f6576f865d
/data/data/####/6e289048-e32f-4a6e-bed1-fb6c5e14fd43
/data/data/####/8115073d-d688-4555-bf33-db1d1be32aea
/data/data/####/9b27028a-b486-4f38-835b-71a2dd47d482
/data/data/####/JPushSA_Config.xml
/data/data/####/MultiDex.lock
/data/data/####/UM_PROBE_DATA.xml
/data/data/####/a==7.5.4&&1.0.10_1544631254842_envelope.log
/data/data/####/appPackageNames_v2
/data/data/####/bugly_db_-journal
/data/data/####/bugly_db_legu-journal
/data/data/####/cn.jpush.android.user.profile.xml
/data/data/####/cn.jpush.preferences.v2.rid.xml
/data/data/####/cn.jpush.preferences.v2.xml
/data/data/####/crashrecord.xml
/data/data/####/dW1weF9pbnRlcm5hbF8xNTQ0NjMxMjU0MjY1;
/data/data/####/eeb58ae5-d96d-47d7-8763-52494c11b6cb
/data/data/####/exchangeIdentity.json
/data/data/####/exid.dat
/data/data/####/fa447c19-4b68-4d5f-87e1-99f036b01024
/data/data/####/gdaemon_20161017
/data/data/####/getui_sp.xml
/data/data/####/gx_sp.xml
/data/data/####/i==1.2.0&&1.0.10_1544631254271_envelope.log
/data/data/####/info.xml
/data/data/####/init.pid
/data/data/####/init_c1.pid
/data/data/####/isFirst.xml
/data/data/####/jpush_device_info.xml
/data/data/####/jpush_stat_cache.json
/data/data/####/jpush_stat_cache_history.json
/data/data/####/libnfix.so
/data/data/####/libshella-2.9.0.2.so
/data/data/####/libufix.so
/data/data/####/local_crash_lock
/data/data/####/mix.dex
/data/data/####/multidex.version.xml
/data/data/####/native_record_lock
/data/data/####/push.pid
/data/data/####/pushext.db-journal
/data/data/####/pushg.db-journal
/data/data/####/pushsdk.db-journal
/data/data/####/run.pid
/data/data/####/security_info
/data/data/####/tdata_bca864
/data/data/####/tdata_bca864.jar
/data/data/####/tdata_fyR930
/data/data/####/tdata_fyR930.jar
/data/data/####/ua.db
/data/data/####/ua.db-journal
/data/data/####/um_pri.xml
/data/data/####/umdat.xml
/data/data/####/umeng_common_config.xml
/data/data/####/umeng_common_config.xml (deleted)
/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/media/####/.a.dat
/data/media/####/.adfwe.dat
/data/media/####/.cca.dat
/data/media/####/.push_deviceid
/data/media/####/.umm.dat
/data/media/####/app.db
/data/media/####/com.getui.sdk.deviceId.db
/data/media/####/com.igexin.sdk.deviceId.db
/data/media/####/com.villaday.idf.bin
/data/media/####/com.villaday.idf.db
/data/media/####/tdata_bca864
/data/media/####/tdata_fyR930
/data/media/####/test.log

Miscellaneous:

Executes the following 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 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
<Package Folder>/files/gdaemon_20161017 0 <Package>/<Package>.service.GeTuiPushService 24572 300 0
chmod 700 /data/user/0/<Package>/tx_shell/libnfix.so
chmod 700 /data/user/0/<Package>/tx_shell/libshella-2.9.0.2.so
chmod 700 /data/user/0/<Package>/tx_shell/libufix.so
chmod 700 <Package Folder>/files/gdaemon_20161017
chmod 700 <Package Folder>/tx_shell/libnfix.so
chmod 700 <Package Folder>/tx_shell/libshella-2.9.0.2.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.emui
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
ls /
ls /sys/class/thermal
ps
sh <Package Folder>/files/gdaemon_20161017 0 <Package>/<Package>.service.GeTuiPushService 24572 300 0

Loads the following dynamic libraries:

Bugly
getuiext3
jcore125
libnfix
libshella-2.9.0.2
libufix
nfix
ufix

Uses the following algorithms to encrypt data:

AES-CBC-PKCS5Padding
AES-CBC-PKCS7Padding
AES-ECB-PKCS7Padding
AES-GCM-NoPadding
RSA-ECB-PKCS1Padding
RSA-NONE-OAEPWithSHA1AndMGF1Padding

Uses the following algorithms to decrypt data:

AES-ECB-NoPadding
AES-GCM-NoPadding

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.

Adds tasks to the system scheduler.

Displays its own windows over windows of other apps.

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