Adware.Gexin.8004

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) sdk.o####.lbs.####.com:80
TCP(HTTP/1.1) ip.ta####.com:80
TCP(HTTP/1.1) p####.ixi####.com:8095
TCP(HTTP/1.1) t####.c####.q####.####.com:80
TCP(HTTP/1.1) c####.id####.com:80
TCP(HTTP/1.1) a.appj####.com:80
TCP(HTTP/1.1) sdk.o####.p####.####.com:80
TCP(HTTP/1.1) c-h####.g####.com:80
TCP(HTTP/1.1) oss.id####.com:80
TCP(HTTP/1.1) a####.u####.com:80
TCP(HTTP/1.1) qin####.com.www.####.com:80
TCP(HTTP/1.1) c####.id####.com:13006
TCP(HTTP/1.1) c####.id####.com:30001
TCP(HTTP/1.1) c####.id####.com:16020
UDP(NTP) ac-####.net.cmu.edu:123
UDP(NTP) cz.p####.ntp.org:123
TCP(SSL/3.0) lmp.abe####.com:443
TCP(TLS/1.0) 2####.58.212.206:443
TCP(TLS/1.0) c####.im.ta####.com:443
TCP(TLS/1.0) i####.ww.ta####.com:443
TCP(TLS/1.0) oss.id####.com:443
TCP(TLS/1.0) lmp.abe####.com:443
TCP sdk.o####.t####.####.com:5224
TCP c####.g####.ig####.com:5226
TCP p####.ixi####.com:8100

DNS requests:

7j####.c####.z0.####.com
a####.u####.com
a.appj####.com
ac-####.net.cmu.edu
c####.g####.ig####.com
c####.id####.com
c####.im.ta####.com
c-h####.g####.com
cz.p####.ntp.org
i####.ww.ta####.com
ip.ta####.com
lmp.abe####.com
log.idot####.com
nav.id####.com
oss.id####.com
oss.t####.com
p####.ixi####.com
pub-####.qin####.com
sdk.c####.ig####.com
sdk.o####.lbs.####.com
sdk.o####.p####.####.com
sdk.o####.t####.####.com
sdk.o####.t####.####.com
sdk.o####.t####.####.net
too####.t####.com
up####.id####.com
up####.ixi####.com

HTTP GET requests:

c####.id####.com//service/customConfig.do?code=####&pkg=####&
c####.id####.com/service/appConfigArray.do?pkg=####&
c####.id####.com/toolbox/032675da-5a00-4657-9a01-8587dfe3243b.png
c####.id####.com/toolbox/0e4926d7-c920-4991-a1d9-cd24284d8187.png
c####.id####.com/toolbox/5faf8bc1-8302-442e-8986-3137597431ae.png
c####.id####.com/toolbox/cd48c074-0a29-41a9-be20-ae3f7da2c54b.png
c####.id####.com/toolbox/d4881377-7d90-484c-bb9b-67751adc5fd0.png
c####.id####.com:13006/server/dadata?packageName=####&channel=####&versi...
c####.id####.com:16020/api/<Package>/360/0/3.1.1
ip.ta####.com/service/getIpInfo.php?ip=####
oss.id####.com/small_tools/images/toolbox/032675da-5a00-4657-9a01-8587df...
oss.id####.com/small_tools/images/toolbox/0e4926d7-c920-4991-a1d9-cd2428...
oss.id####.com/small_tools/images/toolbox/5faf8bc1-8302-442e-8986-313759...
oss.id####.com/small_tools/images/toolbox/cd48c074-0a29-41a9-be20-ae3f7d...
oss.id####.com/small_tools/images/toolbox/d4881377-7d90-484c-bb9b-67751a...
p####.ixi####.com:8095/update/update_stat.php?version=####&token=####
qin####.com.www.####.com/tdata_EDT369
t####.c####.q####.####.com/config/hz-hzv3.conf
t####.c####.q####.####.com/tdata_Ltb577
t####.c####.q####.####.com/tdata_Soq141
t####.c####.q####.####.com/tdata_dVs968
t####.c####.q####.####.com/tdata_ntt510

HTTP POST requests:

a####.u####.com/app_logs
a.appj####.com/ad-service/ad/mark
c####.id####.com/service/customGridSql.do
c####.id####.com:30001/config
c-h####.g####.com/api.php?format=####&t=####
p####.ixi####.com:8095/update/check_update.php
sdk.o####.lbs.####.com/api.htm?format=####&t=####
sdk.o####.p####.####.com/api.php?format=####&t=####

File system changes:

Creates the following files:

/data/data/####/.hl.xml
/data/data/####/.hl.xml (deleted)
/data/data/####/.hl.xml.bak
/data/data/####/.hl.xml.bak (deleted)
/data/data/####/.hl_app_1548460800.xml
/data/data/####/.hl_app_1548460800.xml (deleted)
/data/data/####/.hl_app_1548460800.xml.bak
/data/data/####/.hl_app_1548460800.xml.bak (deleted)
/data/data/####/.hl_atr_1548460800.xml
/data/data/####/.hl_atr_1548460800.xml.bak
/data/data/####/.hl_atr_1548460800.xml.bak (deleted)
/data/data/####/.imprint
/data/data/####/.jg.ic
/data/data/####/.log.lock
/data/data/####/.log.ls
/data/data/####/971fe687d611
/data/data/####/Alvin2.xml
/data/data/####/AutoUpdater.xml
/data/data/####/ContextData.xml
/data/data/####/cc.db
/data/data/####/cc.db-journal
/data/data/####/com.dot.analytics.DotAnalytics_storedPreferences.xml
/data/data/####/com.dotools.clock.p0.log
/data/data/####/com.dotools.clock_2019_01_26_19.p0.gz
/data/data/####/com.dotools.clock_2019_01_26_19.p0.tar
/data/data/####/com.ixintui.data.version.xml
/data/data/####/com.ixintui.push.data.v3-journal
/data/data/####/com.ixintui.push.message.db-journal
/data/data/####/com.ixintui.push.setting.xml
/data/data/####/com.ixintui.stat.basic_db.v2-journal
/data/data/####/com.ixintui.stat.client_db-journal
/data/data/####/com.ixintui.stat.saving.xml
/data/data/####/com.ixintui.stat.setting.xml
/data/data/####/com.ixintui.stat.setting.xml.bak (deleted)
/data/data/####/com.ixintui.time.setting.xml
/data/data/####/core_info
/data/data/####/dotools_config.xml
/data/data/####/exchangeIdentity.json
/data/data/####/exid.dat
/data/data/####/filedownloader
/data/data/####/filedownloader-journal
/data/data/####/gdaemon_20161017
/data/data/####/getui_sp.xml
/data/data/####/gks_download.db-journal
/data/data/####/gx_sp.xml
/data/data/####/icon_build_events.xml
/data/data/####/icon_mark_info.xml
/data/data/####/init.pid
/data/data/####/init_c1.pid
/data/data/####/ixintui
/data/data/####/ixintui_plugin.jar
/data/data/####/jg_app_update_settings_random.xml
/data/data/####/jks.db-journal
/data/data/####/libixintui_asset.so
/data/data/####/libjiagu.so
/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/####/stat_plugin.jar
/data/data/####/stat_plugin_39.jar
/data/data/####/tbs_download_config.xml
/data/data/####/tbscoreinstall.txt
/data/data/####/tbslock.txt
/data/data/####/tdata_Ltb577
/data/data/####/tdata_Ltb577.jar
/data/data/####/tdata_Soq141
/data/data/####/tdata_Soq141.jar
/data/data/####/tdata_dVs968
/data/data/####/tdata_dVs968.jar
/data/data/####/tdata_ntt510
/data/data/####/tdata_ntt510.jar
/data/data/####/ua.db
/data/data/####/ua.db-journal
/data/data/####/umeng_general_config.xml
/data/data/####/umeng_it.cache
/data/data/####/userSessions
/data/data/####/version_compat.xml
/data/data/####/xUtils.db-journal
/data/data/####/ywPrefsTools.xml
/data/media/####/.icon_profile_lock
/data/media/####/.nomedia
/data/media/####/Alvin2.xml
/data/media/####/ContextData.xml
/data/media/####/NotificationAppConfig_Local
/data/media/####/NotificationAppConfig_Local.data
/data/media/####/NotificationAppConfig_Net
/data/media/####/NotificationAppConfig_Net.data
/data/media/####/app.db
/data/media/####/com.dotools.clock.bin
/data/media/####/com.dotools.clock.db
/data/media/####/com.getui.sdk.deviceId.db
/data/media/####/com.igexin.sdk.deviceId.db
/data/media/####/com.ixintui.push.message.db
/data/media/####/com.ixintui.push.tk
/data/media/####/iboxapps
/data/media/####/iboxapps.data
/data/media/####/switch
/data/media/####/switch.data
/data/media/####/tdata_Ltb577
/data/media/####/tdata_Soq141
/data/media/####/tdata_dVs968
/data/media/####/tdata_ntt510
/data/media/####/test.log

Miscellaneous:

Executes the following shell scripts:

<Package Folder>/files/gdaemon_20161017 0 <Package>/push.IDOPushService 24707 300 0
cat /sys/class/net/wlan0/address
chmod 700 <Package Folder>/files/gdaemon_20161017
chmod 755 <Package Folder>/.jiagu/libjiagu.so
chmod 777 <Package Folder>/ixintui
dd if <Package Folder>/files/libixintui_asset.so of <Package Folder>/ixintui
getprop ro.product.cpu.abi
mount
sh
sh <Package Folder>/files/gdaemon_20161017 0 <Package>/push.IDOPushService 24707 300 0

Loads the following dynamic libraries:

getuiext2
jni
libjiagu

Uses the following algorithms to encrypt data:

AES
AES-CBC-PKCS5Padding
AES-CBC-PKCS7Padding
RSA-NONE-OAEPWithSHA1AndMGF1Padding

Uses the following algorithms to decrypt data:

AES
AES-CBC-PKCS7Padding
RSA-ECB-PKCS1Padding

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.

Gets information about accounts associated with the device (Google, Facebook, etc.).

Adds tasks to the system scheduler.

Displays its own windows over windows of other apps.

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