Adware.Gexin.9524

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) www.kr-####.com:80
TCP(HTTP/1.1) c-h####.g####.com:80
TCP(HTTP/1.1) l####.tbs.qq.com:80
TCP(HTTP/1.1) www.timin####.com:80
TCP(HTTP/1.1) t####.c####.q####.####.com:80
TCP(HTTP/1.1) timing-####.kr-####.com:80
TCP(HTTP/1.1) sdk.o####.p####.####.com:80
TCP sdk.o####.t####.####.com:5224
TCP c####.g####.ig####.com:5225

DNS requests:

7j####.c####.z0.####.com
c####.g####.ig####.com
c-h####.g####.com
l####.tbs.qq.com
pub-####.qin####.com
sdk.c####.ig####.com
sdk.o####.p####.####.com
sdk.o####.t####.####.com
sdk.o####.t####.####.com
sdk.o####.t####.####.net
timing-####.kr-####.com
www.kr-####.com
www.timin####.com

HTTP GET requests:

t####.c####.q####.####.com/tdata_JNg986
t####.c####.q####.####.com/tdata_MkX219
t####.c####.q####.####.com/tdata_iRz660
t####.c####.q####.####.com/tdata_zzW503
timing-####.kr-####.com/image/timing_2113714_1550892561163_mw9h0uf8wjmqu...
timing-####.kr-####.com/image/timing_2113714_1551650082182_0d1ptyq2pbgot...
timing-####.kr-####.com/image/timing_2113714_1551650084584_o26ia6h6fzluo...
timing-####.kr-####.com/image/timing_2113714_1551650085368_ukrlw3w6g6jqv...
timing-####.kr-####.com/image/timing_2113714_1551650085835_doarl2v5b9ylc...
timing-####.kr-####.com/image/timing_2113714_1551650086540_j6zbddtv6ff0g...
timing-####.kr-####.com/image/timing_2265001_1551608652000_1fpfo8v0oh696...
timing-####.kr-####.com/image/timing_2540730_1550275612000_asfx6ppyj845j...
timing-####.kr-####.com/image/timing_2540730_1551649958000_8hfzczkv0tjbj...
timing-####.kr-####.com/image/timing_2548262_1550306357738_v25t6oyqhkx8m...
timing-####.kr-####.com/image/timing_2548262_1551650035188_3bbpvy1509ukz...
www.timin####.com/css/service.css
www.timin####.com/service

HTTP POST requests:

c-h####.g####.com/api.php?format=####&t=####
l####.tbs.qq.com/ajax?c=####&k=####
sdk.o####.p####.####.com/api.php?format=####&t=####
sdk.o####.p####.####.com/api.php?format=####&t=####&d=####&k=####
www.kr-####.com/guest/data-for-new-user
www.kr-####.com/guest/feed-detail

File system changes:

Creates the following files:

/data/data/####/.jg.ic
/data/data/####/SP_APK.xml
/data/data/####/WebViewSettings.xml
/data/data/####/__Baidu_Stat_SDK_SendRem.xml
/data/data/####/__local_ap_info_cache.json
/data/data/####/__local_last_session.json
/data/data/####/__local_stat_cache.json
/data/data/####/__send_data_1551660883635
/data/data/####/__send_data_1551660884546
/data/data/####/baidu_mtj_sdk_record.xml
/data/data/####/core_info
/data/data/####/data_0
/data/data/####/data_1
/data/data/####/data_2
/data/data/####/data_3
/data/data/####/debug.conf
/data/data/####/disk_entries_list_timing_fresco_o_379684981.xml
/data/data/####/disk_entries_list_timing_fresco_s_379684985.xml
/data/data/####/gdaemon_20161017
/data/data/####/getui_sp.xml
/data/data/####/gkt-journal
/data/data/####/gx_sp.xml
/data/data/####/index
/data/data/####/init.pid
/data/data/####/init_c1.pid
/data/data/####/libcuid.so
/data/data/####/libjiagu.so
/data/data/####/multidex.version.xml
/data/data/####/push.pid
/data/data/####/pushext.db-journal
/data/data/####/pushg.db-journal
/data/data/####/pushk.db-journal
/data/data/####/pushsdk.db-journal
/data/data/####/pushservice__local_stat_cache.json
/data/data/####/run.pid
/data/data/####/tbs_download_config.xml
/data/data/####/tbs_download_stat.xml
/data/data/####/tbscoreinstall.txt
/data/data/####/tbslock.txt
/data/data/####/tdata_JNg986
/data/data/####/tdata_JNg986.jar
/data/data/####/tdata_MkX219
/data/data/####/tdata_MkX219.jar
/data/data/####/tdata_iRz660
/data/data/####/tdata_iRz660.jar
/data/data/####/tdata_zzW503
/data/data/####/tdata_zzW503.jar
/data/data/####/timing.db-journal
/data/data/####/webview.db-journal
/data/data/####/webviewCookiesChromium.db-journal
/data/media/####/.confd
/data/media/####/.confd-journal
/data/media/####/.cuid2
/data/media/####/.nomedia
/data/media/####/.timestamp
/data/media/####/app.db
/data/media/####/com.getui.sdk.deviceId.db
/data/media/####/com.huiian.timing.bin
/data/media/####/com.huiian.timing.db
/data/media/####/com.igexin.sdk.deviceId.db
/data/media/####/gkt-journal
/data/media/####/gktper
/data/media/####/tdata_JNg986
/data/media/####/tdata_MkX219
/data/media/####/tdata_iRz660
/data/media/####/tdata_zzW503
/data/media/####/temp_ffmpeg.log
/data/media/####/test.log

Miscellaneous:

Executes the following shell scripts:

<Package Folder>/files/gdaemon_20161017 0 <Package>/<Package>.service.GetuiService 24697 300 0
cat /sys/class/net/wlan0/address
chmod 700 <Package Folder>/files/gdaemon_20161017
chmod 755 <Package Folder>/.jiagu/libjiagu.so
getprop ro.build.display.id
getprop ro.build.version.emui
getprop ro.build.version.opporom
getprop ro.miui.ui.version.name
getprop ro.product.cpu.abi
getprop ro.smartisan.version
getprop ro.vivo.os.version
mount
sh <Package Folder>/files/gdaemon_20161017 0 <Package>/<Package>.service.GetuiService 24697 300 0

Loads the following dynamic libraries:

crash_analysis
ffmpeg
getuiext2
imagepipeline
libjiagu
openh264
static-webp
vcamera

Uses the following algorithms to encrypt data:

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

Uses the following algorithms to decrypt data:

AES-CBC-PKCS5Padding
AES-ECB-PKCS5Padding

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.

Adds tasks to the system scheduler.

Displays its own windows over windows of other apps.

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