Adware.Gexin.640

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) kuaik####.caifuha####.com:80
TCP(HTTP/1.1) ip.ta####.com:80
TCP(HTTP/1.1) c-h####.g####.com:80
TCP(HTTP/1.1) a####.u####.com:80
TCP(HTTP/1.1) t####.c####.q####.####.com:80
TCP(HTTP/1.1) sni.c####.q####.####.net:80
TCP(HTTP/1.1) tjj.caifuha####.com:80
TCP(HTTP/1.1) pi####.qq.com:80
TCP(HTTP/1.1) cgi.con####.qq.com:80
TCP(HTTP/1.1) www.a.sh####.com:80
TCP(HTTP/1.1) sdk.o####.p####.####.com:80
TCP(HTTP/1.1) tjj.caifuha####.com:9000
TCP(HTTP/1.1) re####.shequzh####.com:9000
UDP(NTP) hk.p####.ntp.org:123
UDP(NTP) cn.p####.ntp.org:123
UDP(NTP) p####.ntp.org:123
UDP(NTP) tw.p####.ntp.org:123
UDP(NTP) jp.p####.ntp.org:123
TCP c####.g####.ig####.com:5225
TCP sdk.o####.t####.####.com:5224

DNS requests:

7j####.c####.z0.####.com
a####.u####.com
c####.g####.ig####.com
c-h####.g####.com
cgi.con####.qq.com
cn.p####.ntp.org
hk.p####.ntp.org
ip.ta####.com
jp.p####.ntp.org
kua####.666####.com
kuaik####.caifuha####.com
p####.ntp.org
pi####.qq.com
pub-####.qin####.com
re####.shequzh####.com
sdk.c####.ig####.com
sdk.o####.p####.####.com
sdk.o####.t####.####.com
sdk.o####.t####.####.com
sdk.o####.t####.####.net
tjj.caifuha####.com
tra####.5####.cn
tw.p####.ntp.org
www.b####.com

HTTP GET requests:

cgi.con####.qq.com/qqconnectopen/openapi/policy_conf?sdkv=####&appid=###...
ip.ta####.com/service/getIpInfo2.php?ip=####
kuaik####.caifuha####.com/employ/sys/citycode/ip
kuaik####.caifuha####.com/front/kuaikedai_kuaipin/index.html
kuaik####.caifuha####.com/front/kuaikedai_kuaipin/static/css/app.9a36c46...
kuaik####.caifuha####.com/front/kuaikedai_kuaipin/static/css/main.css
kuaik####.caifuha####.com/front/kuaikedai_kuaipin/static/css/normalize.css
kuaik####.caifuha####.com/front/kuaikedai_kuaipin/static/js/app.8f5407e7...
kuaik####.caifuha####.com/front/kuaikedai_kuaipin/static/js/manifest.781...
kuaik####.caifuha####.com/front/kuaikedai_kuaipin/static/js/vendor.190a0...
sni.c####.q####.####.net/config/hz-hzv3.conf
sni.c####.q####.####.net/tdata_SzD730
sni.c####.q####.####.net/tdata_ZCi456
t####.c####.q####.####.com/tdata_EDT356
tjj.caifuha####.com/b.gif?id=####&t1=####&t=####&lh=####&pi=####&ri=####...
tjj.caifuha####.com/k.gif?k_position=0_741_0_367&k_href=http://kuaikedai...
tjj.caifuha####.com/t.gif?t_track=####&t_id=####&id=####&t1=####&t=####&...
tjj.caifuha####.com/t.gif?t_track=####&t_id=####&t_text=####&id=####&t1=...
tjj.caifuha####.com/tjj.min.js

HTTP POST requests:

a####.u####.com/app_logs
c-h####.g####.com/api.php?format=####&t=####
kuaik####.caifuha####.com/KLoan/sys/check_update
kuaik####.caifuha####.com/employ/config/dic_update
kuaik####.caifuha####.com/employ/config/open_citys
pi####.qq.com/mstat/report
re####.shequzh####.com:9000/polls/android_version_config/
sdk.o####.p####.####.com/api.php?format=####&t=####
tjj.caifuha####.com:9000/polls/upload/
www.a.sh####.com/

Modified file system:

Creates the following files:

/data/data/####/.imprint
/data/data/####/.jg.ic
/data/data/####/.kuaikedai
/data/data/####/66.xml
/data/data/####/MultiDex.lock
/data/data/####/bb40e128cece
/data/data/####/cc.db
/data/data/####/cc.db-journal
/data/data/####/com.kuaikedai.loan_preferences.xml
/data/data/####/com.tencent.open.config.json.1106686356
/data/data/####/com.weidai.loan.model.config.ConfigModel.xml
/data/data/####/com.weidai.loan.model.district.CityListCacheModel.xml
/data/data/####/data_0
/data/data/####/data_1
/data/data/####/data_2
/data/data/####/data_3
/data/data/####/exchangeIdentity.json
/data/data/####/exid.dat
/data/data/####/gdaemon_20161017
/data/data/####/gx_sp.xml
/data/data/####/http_kuaikedai.caifuhanshu.com_0.localstorage-journal
/data/data/####/index
/data/data/####/init.pid
/data/data/####/init_c1.pid
/data/data/####/libjiagu1118851799.so
/data/data/####/multidex.version.xml
/data/data/####/push.pid
/data/data/####/push_channel_cache_getui.xml
/data/data/####/pushext.db-journal
/data/data/####/pushg.db-journal
/data/data/####/pushsdk.db-journal
/data/data/####/run.pid
/data/data/####/status.xml
/data/data/####/tdata_SzD730
/data/data/####/tdata_SzD730.jar
/data/data/####/tdata_ZCi456
/data/data/####/tdata_ZCi456.jar
/data/data/####/tencent_analysis.db-journal
/data/data/####/ua.db
/data/data/####/ua.db-journal
/data/data/####/umeng_general_config.xml
/data/data/####/umeng_it.cache
/data/data/####/webview.db-journal
/data/data/####/webviewCookiesChromium.db-journal
/data/data/####/zzjrgc.db-journal
/data/media/####/.kuaikedai
/data/media/####/.mid.txt
/data/media/####/1532604235967.trace
/data/media/####/app.db
/data/media/####/com.getui.sdk.deviceId.db
/data/media/####/com.igexin.sdk.deviceId.db
/data/media/####/com.kuaikedai.loan.db
/data/media/####/tdata_SzD730
/data/media/####/tdata_ZCi456
/data/media/####/test.log

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
<Package Folder>/files/gdaemon_20161017 0 <Package>/com.igexin.sdk.PushService 24773 300 0
busybox ifconfig
cat /sys/class/net/wlan0/address
chmod 700 <Package Folder>/files/gdaemon_20161017
chmod 755 <Package Folder>/.jiagu/libjiagu1118851799.so
mount

Loads the following dynamic libraries:

MtaNativeCrash
getuiext2
libjiagu1118851799

Uses the following algorithms to encrypt data:

AES-CBC-PKCS7Padding
RSA-NONE-OAEPWithSHA1AndMGF1Padding

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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