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Android.HiddenAds.589

Added to the Dr.Web virus database: 2018-08-02

Virus description added: 2018-08-02

Technical information

Malicious functions:

Executes code of the following detected threats:

Android.DownLoader.750.origin
Android.DownLoader.751.origin
Android.HiddenAds.210.origin
Android.Xiny.232.origin

Network activity:

Connecting to:

UDP(DNS) <Google DNS>
TCP(HTTP/1.1) url.gmsce####.org:10000
TCP(HTTP/1.1) adv.google-####.com:80
TCP(HTTP/1.1) premium####.com:80
TCP(HTTP/1.1) mob.media####.club:80
TCP(HTTP/1.1) aexcep####.b####.qq.com:8012
TCP(HTTP/1.1) and####.b####.qq.com:80
TCP(HTTP/1.1) api.info####.me:80
TCP(HTTP/1.1) sg3.a####.xyz:80
TCP(HTTP/1.1) l.a####.com:80
TCP(HTTP/1.1) ols.dedicat####.com:80
TCP(TLS/1.0) q-####.go2af####.com:443
TCP(TLS/1.0) api.info####.me:443
TCP(TLS/1.0) sub.s####.1####.com:7078

DNS requests:

a####.k####.a####.top
adv.google-####.com
aexcep####.b####.qq.com
and####.b####.qq.com
api.info####.me
l.a####.com
mob.media####.club
ols.dedicat####.com
premium####.com
q-####.go2af####.com
sg3.a####.xyz
url.gmsce####.org

HTTP GET requests:

api.info####.me/api/s2s/goto?id=####&channel=####&provider=####&appkey=#...
mob.media####.club/redirect?feed=####&auth=####&url=####&subid=####&subi...
ols.dedicat####.com/sl?feed=####&auth=####&subid=####
premium####.com/d/26507508e8ef6715c0b?sub=####&source=####
premium####.com/d/26507508e8ef6715c0b?sub=####&source=####&code=####
premium####.com/gw?sub=5b62ce602a56790001f3ce84&source=53&url=http://mob...
sg3.a####.xyz/img/nor_dy3_80521.png

HTTP POST requests:

adv.google-####.com/mob/chk
aexcep####.b####.qq.com:8012/rqd/async
and####.b####.qq.com/rqd/async
l.a####.com/l.php
url.gmsce####.org:10000/adv_url_v1/mediation

Modified file system:

Creates the following files:

/data/data/####/.atmp9.jar
/data/data/####/.atmp_8.log
/data/data/####/.do.jar
/data/data/####/AdRecordTime20180716.xml
/data/data/####/AdvertDomain20180716.xml
/data/data/####/AdvertReport20180716.xml
/data/data/####/AdvertState20180716.xml
/data/data/####/AdvertUnique20180716.xml
/data/data/####/DateState.xml
/data/data/####/IM.xml
/data/data/####/androidnativ_com.cultrue.literary.xml
/data/data/####/black.dat
/data/data/####/bugly_db_legu-journal
/data/data/####/d.zip
/data/data/####/data_0
/data/data/####/data_1
/data/data/####/data_2
/data/data/####/data_3
/data/data/####/db_s_im.db
/data/data/####/db_s_im.db-journal
/data/data/####/hfgtsp_config.xml
/data/data/####/im.database.ad-journal
/data/data/####/index
/data/data/####/libnfix.so
/data/data/####/libshella-2.9.0.1.so
/data/data/####/libufix.so
/data/data/####/local_crash_lock
/data/data/####/mix.dex
/data/data/####/my.db
/data/data/####/my.db-journal
/data/data/####/native_record_lock
/data/data/####/ob.zip
/data/data/####/s_sdk_pro_pref.xml
/data/data/####/security_info
/data/data/####/settingsLog.xml
/data/data/####/settingsLog.xml.bak
/data/data/####/sp_click_cf.xml
/data/data/####/t_ini.xml
/data/data/####/v71.xml
/data/data/####/wap_data.xml
/data/data/####/webview.db-journal
/data/data/####/webviewCookiesChromium.db-journal
/data/data/####/webviewCookiesChromiumPrivate.db-journal
/data/media/####/57.001.20180716.01
/data/media/####/s_client.txt
/data/media/####/s_imei.txt

Miscellaneous:

Executes next shell scripts:

/system/bin/cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq
/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
chmod 700 <Package Folder>/tx_shell/libnfix.so
chmod 700 <Package Folder>/tx_shell/libshella-2.9.0.1.so
chmod 700 <Package Folder>/tx_shell/libufix.so
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.lenovo.series
getprop ro.lewa.version
getprop ro.meizu.product.model
getprop ro.miui.ui.version.name
getprop ro.yunos.version
logcat -d -v threadtime

Loads the following dynamic libraries:

Bugly
libnfix
libshella-2.9.0.1
libufix
nfix
ufix

Uses the following algorithms to encrypt data:

AES-CBC-NoPadding
AES-ECB-PKCS5Padding
AES-GCM-NoPadding
RSA-ECB-PKCS1Padding

Uses the following algorithms to decrypt data:

AES
AES-CBC-NoPadding
AES-ECB-PKCS5Padding
AES-GCM-NoPadding

Uses special library to hide executable bytecode.

Gains access to network information.

Gains access to telephone information (number, imei, etc.).

Gains access to information about installed applications.

Gains access to information about running applications.

Adds tasks to the system scheduler.

Curing recommendations

Android

If the mobile device is operating normally, download and install Dr.Web for Android Light. Run a full system scan and follow recommendations to neutralize the detected threats.
If the mobile device has been locked by Android.Locker ransomware (the message on the screen tells you that you have broken some law or demands a set ransom amount; or you will see some other announcement that prevents you from using the handheld normally), do the following:
- Load your smartphone or tablet in the safe mode (depending on the operating system version and specifications of the particular mobile device involved, this procedure can be performed in various ways; seek clarification from the user guide that was shipped with the device, or contact its manufacturer);
- Once you have activated safe mode, install the Dr.Web для Android Light onto the infected handheld and run a full scan of the system; follow the steps recommended for neutralizing the threats that have been detected;
- Switch off your device and turn it on as normal.

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