Adware.Gexin.203

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) sni.c####.q####.####.net:80
TCP(HTTP/1.1) sdk.o####.p####.####.com:80
TCP(HTTP/1.1) c-h####.g####.com:80
TCP(HTTP/1.1) nsc####.b####.com:80
TCP(HTTP/1.1) k####.b####.com:80
TCP(HTTP/1.1) cgi.con####.qq.com:80
TCP(TLS/1.0) nsc####.b####.com:443
TCP(TLS/1.0) uf####.b####.com:443
TCP(TLS/1.0) j####.b####.com:443
TCP(TLS/1.0) api.w####.com:443
TCP(TLS/1.0) a####.b####.com:443
TCP(TLS/1.0) w####.b####.com:443
TCP(TLS/1.0) www.a.sh####.com:443
TCP(TLS/1.0) so####.b####.com:443
TCP(TLS/1.0) www.baif####.com:443
TCP(TLS/1.0) c####.b####.com:443
TCP(TLS/1.0) h####.b####.com:443
TCP(TLS/1.0) g####.bdst####.com:443
TCP(TLS/1.0) gi####.b####.com:443
TCP(TLS/1.0) edu-y####.b####.com.####.com:443
TCP c####.g####.ig####.com:5227
TCP sdk.o####.t####.####.com:5224

DNS requests:

7j####.c####.z0.####.com
a####.b####.com
api.w####.com
c####.b####.com
c####.g####.ig####.com
c-h####.g####.com
cgi.con####.qq.com
edu-y####.b####.com
g####.bdst####.com
gi####.b####.com
h####.b####.com
j####.b####.com
k####.b####.com
m.b####.com
nsc####.b####.com
sdk.c####.ig####.com
sdk.o####.p####.####.com
sdk.o####.t####.####.com
sdk.o####.t####.####.com
sdk.o####.t####.####.net
so####.b####.com
uf####.b####.com
w####.b####.com
www.b####.com
www.baif####.com

HTTP GET requests:

cgi.con####.qq.com/qqconnectopen/openapi/policy_conf?sdkv=####&appid=###...
k####.b####.com/rule/wenku_android_1.6.2.rule
nsc####.b####.com/v.gif?feature_type=####&clientfrom=####&package_name=#...
sni.c####.q####.####.net/config/hz-hzv3.conf
sni.c####.q####.####.net/tdata_YYn966
sni.c####.q####.####.net/tdata_eOt091

HTTP POST requests:

c-h####.g####.com/api.php?format=####&t=####
k####.b####.com/ctj/wenku?uid=####&ndid=####&enter_type=####&op=####&c=#...
sdk.o####.p####.####.com/api.php?format=####&t=####

Modified file system:

Creates the following files:

/data/data/####/.jg.ic
/data/data/####/.libbaiducuid.so
/data/data/####/0_freq.xml
/data/data/####/51_bs.xml
/data/data/####/AndroidTTS.xml
/data/data/####/BaiduGid.db-journal
/data/data/####/SP_AROUTER_CACHE.xml
/data/data/####/Stat_SDK_SendRem.xml
/data/data/####/UfoSharePreference.xml
/data/data/####/__Baidu_Stat_SDK_SendRem.xml
/data/data/####/__Baidu_Wallet_SDK_FP.xml
/data/data/####/__local_ap_info_cache.json
/data/data/####/__local_last_session.json
/data/data/####/__local_stat_cache.json
/data/data/####/__send_data_1526453963781
/data/data/####/__send_data_1526453974354
/data/data/####/__send_data_1526453976252
/data/data/####/__send_data_1526453976312
/data/data/####/__send_data_1526453978184
/data/data/####/__send_data_1526453978218
/data/data/####/__send_data_1526453981001
/data/data/####/_nlog_0_wenku.009875b24d55f6e36a9370c052fb0689.dat
/data/data/####/aitingCommonConfig.xml
/data/data/####/aitingSearchHitConfig.xml
/data/data/####/aitingSplashConfig.xml
/data/data/####/aiting_1.db-journal
/data/data/####/androidNormalUpdateSet.xml
/data/data/####/baidu_mtj_sdk_record.xml
/data/data/####/bd_pass_cuid_system.xml
/data/data/####/bdg_system.xml
/data/data/####/com.baidu.aiting_preferences.xml
/data/data/####/com.baidu.wallet.preferences_name.xml
/data/data/####/com.tencent.open.config.json.101462182
/data/data/####/crablite_app_life.xml
/data/data/####/crablite_user_info.xml
/data/data/####/customerservice.db-journal
/data/data/####/d.db-journal
/data/data/####/fdid.xml
/data/data/####/gdaemon_20161017
/data/data/####/getui_sp.xml
/data/data/####/gx_sp.xml
/data/data/####/init.pid
/data/data/####/init_c1.pid
/data/data/####/leroadcfg.xml
/data/data/####/libcuid.so
/data/data/####/libjiagu354005292.so
/data/data/####/multidex.version.xml
/data/data/####/pass.p51-1.0.2-1.0.3.apk
/data/data/####/pass.p51-1.0.2-1.0.3.png
/data/data/####/push.pid
/data/data/####/pushext.db-journal
/data/data/####/pushg.db-journal
/data/data/####/pushsdk.db-journal
/data/data/####/qihoo_jiagu_crash_report.xml
/data/data/####/re_po_rt.xml
/data/data/####/rim-package-info.xml
/data/data/####/run.pid
/data/data/####/sapi_share.xml
/data/data/####/sapi_system.xml
/data/data/####/speechConfig.xml
/data/data/####/tdata_YYn966
/data/data/####/tdata_YYn966.jar
/data/data/####/tdata_eOt091
/data/data/####/tdata_eOt091.jar
/data/data/####/tpgcc.db-journal
/data/data/####/version.dat
/data/data/####/webview.db-journal
/data/data/####/webviewCookiesChromium.db-journal
/data/media/####/.confd
/data/media/####/.confd-journal
/data/media/####/.config.txt
/data/media/####/.cuid
/data/media/####/.cuid2
/data/media/####/.fdid
/data/media/####/.index
/data/media/####/.libbaiducuid.so
/data/media/####/.timestamp
/data/media/####/aitingCommonConfig
/data/media/####/aitingDefaultConfig
/data/media/####/aitingSearchHitConfig
/data/media/####/aitingSplashConfig
/data/media/####/androidNormalUpdateSet
/data/media/####/app.db
/data/media/####/app_log.txt
/data/media/####/bd_etts_speech_female.dat
/data/media/####/bd_etts_speech_male.dat
/data/media/####/bd_etts_text.dat
/data/media/####/com.baidu.aiting.bin
/data/media/####/com.baidu.aiting.db
/data/media/####/com.getui.sdk.deviceId.db
/data/media/####/com.igexin.sdk.deviceId.db
/data/media/####/com.tencent.mobileqq_connectSdk.18.05.16.06.log
/data/media/####/e5b7a0f65e9c0b16683c043bf52e61cf
/data/media/####/log.txt
/data/media/####/set.zip
/data/media/####/speechConfig
/data/media/####/tdata_YYn966
/data/media/####/tdata_eOt091
/data/media/####/test.log

Miscellaneous:

Executes next shell scripts:

<Package Folder>/files/gdaemon_20161017 0 <Package>/service.push.push.getui.GetuiPushManagerService 24564 300 0
chmod 700 <Package Folder>/files/gdaemon_20161017
chmod 755 <Package Folder>/.jiagu/libjiagu354005292.so
getprop ro.build.display.id
getprop ro.build.version.emui
getprop ro.build.version.opporom
getprop ro.miui.ui.version.name
getprop ro.smartisan.version
getprop ro.vivo.os.version
ls -l /system/bin/su
sh <Package Folder>/files/gdaemon_20161017 0 <Package>/service.push.push.getui.GetuiPushManagerService 24564 300 0

Loads the following dynamic libraries:

BDSpeechDecoder_V1
bd_etts
bd_fsg_rim_v1_1
bd_wsp_v1_0
bdtts
crash_analysis
fire
getuiext2
gnustl_shared
libjiagu354005292
weibosdkcore

Uses the following algorithms to encrypt data:

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

Uses the following algorithms to decrypt data:

AES
AES-CBC-NoPadding
AES-CBC-PKCS5Padding
AES-CBC-PKCS7Padding

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.

Gains access to information about running applications.

Adds tasks to the system scheduler.

Displays its own windows over windows of other applications.

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