Adware.Gexin.4356

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:8011
TCP(HTTP/1.1) c-h####.g####.com:80
TCP(HTTP/1.1) sh.wagbr####.aliyun####.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) www.dm####.com:80
TCP(HTTP/1.1) sdk.o####.p####.####.com:80
TCP(HTTP/1.1) res####.a####.com:80
TCP(TLS/1.0) et2-na6####.wagbr####.ali####.####.com:443
TCP(TLS/1.0) lbs.net####.im:443
TCP(TLS/1.0) nim.qi####.com:443
TCP(TLS/1.0) res####.a####.com:443
TCP(TLS/1.0) qy-swa####.qi####.com:443
TCP c####.g####.ig####.com:5225
TCP sdk.o####.t####.####.com:5224
TCP l####.net####.im:8080

DNS requests:

7j####.c####.z0.####.com
a####.b####.qq.com
aexcep####.b####.qq.com
amap####.cn-hang####.oss####.####.com
and####.b####.qq.com
api####.a####.com
c####.g####.ig####.com
c-h####.g####.com
l####.net####.im
lbs.net####.im
nim.qi####.com
plb####.u####.com
qy-swa####.qi####.com
res####.a####.com
sdk.c####.ig####.com
sdk.o####.p####.####.com
sdk.o####.t####.####.com
sdk.o####.t####.####.com
sdk.o####.t####.####.net
u####.u####.com
www.dm####.com

HTTP GET requests:

sh.wagbr####.aliyun####.com/sdkcoor/android/x86/libJni_wgs2gcj.so
t####.c####.q####.####.com/config/hz-hzv3.conf
t####.c####.q####.####.com/tdata_YYn966
t####.c####.q####.####.com/tdata_eOt091
www.dm####.com/api/common/getsysvalue.htm?key=####&mobileType=####&versi...
www.dm####.com/api/h5/list.htm?mobileType=####&versionNumber=####

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=####
res####.a####.com/v3/log/init
sdk.o####.p####.####.com/api.php?format=####&t=####

Modified file system:

Creates the following files:

/data/data/####/.imprint
/data/data/####/1004
/data/data/####/NIMSDK_Config_d9be522ad76dfb873b72a1787cce6824.xml
/data/data/####/NIMSDK_Config_d9be522ad76dfb873b72a1787cce6824_...21.xml
/data/data/####/Unicorn.d9be522ad76dfb873b72a1787cce6824.xml
/data/data/####/a==7.5.3&&1.3.7_1541516561161_envelope.log
/data/data/####/basic_params.xml
/data/data/####/bugly_db_-journal
/data/data/####/bugly_db_legu-journal
/data/data/####/clientSp.xml
/data/data/####/com.qiyukf.analytics.xml
/data/data/####/crashrecord.xml
/data/data/####/dW1weF9pbnRlcm5hbF8xNTQxNTE2NTY4MzY5;
/data/data/####/dW1weF9pbnRlcm5hbF8xNTQxNTE2NTYwNDA3;
/data/data/####/dW1weF9pbnRlcm5hbF8xNTQxNTE2NTc4NDAx;
/data/data/####/dW1weF9pbnRlcm5hbF8xNTQxNTE2NTczNjMx;
/data/data/####/dW1weF9pbnRlcm5hbF8xNTQxNTE2NTg4MTAz;
/data/data/####/dW1weF9pbnRlcm5hbF8xNTQxNTE2NTgyOTgx;
/data/data/####/dW1weF9pbnRlcm5hbF8xNTQxNTE2NTk3OTYz;
/data/data/####/dW1weF9pbnRlcm5hbF8xNTQxNTE2NTkyNzY1;
/data/data/####/dW1weF9pbnRlcm5hbF8xNTQxNTE2NjA3MjQ1;
/data/data/####/dW1weF9pbnRlcm5hbF8xNTQxNTE2NjAyNzQy;
/data/data/####/dW1weF9pbnRlcm5hbF8xNTQxNTE2NjE2OTg2;
/data/data/####/dW1weF9pbnRlcm5hbF8xNTQxNTE2NjEyNDg2;
/data/data/####/dW1weF9pbnRlcm5hbF8xNTQxNTE2NjI2ODE3;
/data/data/####/dW1weF9pbnRlcm5hbF8xNTQxNTE2NjIyMjM1;
/data/data/####/exchangeIdentity.json
/data/data/####/exid.dat
/data/data/####/gdaemon_20161017
/data/data/####/getui_sp.xml
/data/data/####/gx_sp.xml
/data/data/####/hmdb
/data/data/####/hmdb-journal
/data/data/####/i==1.2.0&&1.3.7_1541516560539_envelope.log
/data/data/####/i==1.2.0&&1.3.7_1541516568494_envelope.log
/data/data/####/i==1.2.0&&1.3.7_1541516578517_envelope.log
/data/data/####/i==1.2.0&&1.3.7_1541516588274_envelope.log
/data/data/####/i==1.2.0&&1.3.7_1541516598084_envelope.log
/data/data/####/i==1.2.0&&1.3.7_1541516602934_envelope.log
/data/data/####/i==1.2.0&&1.3.7_1541516612537_envelope.log
/data/data/####/i==1.2.0&&1.3.7_1541516622437_envelope.log
/data/data/####/info.xml
/data/data/####/init.pid
/data/data/####/init_c1.pid
/data/data/####/journal
/data/data/####/journal.tmp
/data/data/####/libnfix.so
/data/data/####/libshella-2.9.0.2.so
/data/data/####/libufix.so
/data/data/####/local_crash_lock
/data/data/####/loctemp.so
/data/data/####/logdb.db
/data/data/####/logdb.db-journal
/data/data/####/mix.dex
/data/data/####/msg.db-journal
/data/data/####/multidex.version.xml
/data/data/####/native_record_lock
/data/data/####/pref.xml
/data/data/####/push.pid
/data/data/####/pushext.db-journal
/data/data/####/pushg.db-journal
/data/data/####/pushsdk.db-journal
/data/data/####/qiyu_save_d9be522ad76dfb873b72a1787cce6824.xml
/data/data/####/run.pid
/data/data/####/security_info
/data/data/####/security_info (deleted)
/data/data/####/tdata_YYn966
/data/data/####/tdata_YYn966.jar
/data/data/####/tdata_eOt091
/data/data/####/tdata_eOt091.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_location.xml
/data/data/####/umeng_general_config.xml
/data/data/####/umeng_it.cache
/data/data/####/unicorn#cheese#
/data/media/####/.a.dat
/data/media/####/.adfwe.dat
/data/media/####/.cca.dat
/data/media/####/.nomedia
/data/media/####/.umm.dat
/data/media/####/20181106150243.txt
/data/media/####/20181106150249.txt
/data/media/####/20181106150254.txt
/data/media/####/20181106150258.txt
/data/media/####/20181106150303.txt
/data/media/####/20181106150308.txt
/data/media/####/20181106150313.txt
/data/media/####/20181106150318.txt
/data/media/####/20181106150323.txt
/data/media/####/20181106150327.txt
/data/media/####/20181106150332.txt
/data/media/####/20181106150337.txt
/data/media/####/20181106150342.txt
/data/media/####/20181106150347.txt
/data/media/####/app.db
/data/media/####/com.getui.sdk.deviceId.db
/data/media/####/com.igexin.sdk.deviceId.db
/data/media/####/com.zhongxi.dami.bin
/data/media/####/com.zhongxi.dami.db
/data/media/####/sysid.dat
/data/media/####/tdata_YYn966
/data/media/####/tdata_eOt091
/data/media/####/test.log
/data/media/####/tmp_u_20181106

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 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.CustomPushService 24597 300 0
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 /sys/class/thermal
sh <Package Folder>/files/gdaemon_20161017 0 <Package>/<Package>.service.CustomPushService 24597 300 0

Loads the following dynamic libraries:

Bugly
getuiext2
libnfix
libshella-2.9.0.2
libufix
nfix
ufix

Uses the following algorithms to encrypt data:

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

Uses the following algorithms to decrypt data:

AES-CBC-PKCS7Padding
AES-ECB-NoPadding
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.).

Gains access to information about APN settings.

Gains access to information about installed applications.

Adds tasks to the system scheduler.

Displays its own windows over windows of other applications.

Technologies

Terminology

Training and education

Myths

Technical information

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