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Android.Hidden.4105

Added to the Dr.Web virus database: 2017-09-24

Virus description added: 2017-09-25

Technical information

Malicious functions:

Removes its shortcut from the home screen.

Network activity:

Connecting to:

UDP(DNS) <Google DNS>
TCP(GCM) <Google Host>
TCP(HTTP/1.1) a####.u####.com:80
TCP(HTTP/1.1) and####.b####.qq.com:80
TCP(HTTP/1.1) co####.clou####.com:80

DNS requests:

a####.u####.com
and####.b####.qq.com
api.solidtr####.com
co####.clou####.com

HTTP GET requests:

co####.clou####.com/v1/config?os_sdk=####&model=####&os_ver=####&imei=##...

Modified file system:

Creates the following files:

<Package Folder>/app_bin/daemon
<Package Folder>/app_crashrecord/1004
<Package Folder>/databases/analytics.db
<Package Folder>/databases/analytics.db-journal
<Package Folder>/databases/bugly_db_-journal
<Package Folder>/databases/cc.db
<Package Folder>/databases/cc.db-journal
<Package Folder>/databases/ua.db
<Package Folder>/databases/ua.db-journal
<Package Folder>/files/####/exchangeIdentity.json
<Package Folder>/files/.imprint
<Package Folder>/files/exid.dat
<Package Folder>/files/local_crash_lock (deleted)
<Package Folder>/files/native_record_lock
<Package Folder>/files/security_info
<Package Folder>/files/umeng_it.cache
<Package Folder>/shared_prefs/adsdk.xml
<Package Folder>/shared_prefs/analytics_state.xml
<Package Folder>/shared_prefs/callEndSdk.xml
<Package Folder>/shared_prefs/callEndSdk.xml.bak
<Package Folder>/shared_prefs/config_status.xml
<Package Folder>/shared_prefs/config_status.xml.bak
<Package Folder>/shared_prefs/cover.xml
<Package Folder>/shared_prefs/cover_status.xml
<Package Folder>/shared_prefs/crashrecord.xml
<Package Folder>/shared_prefs/multidex.version.xml
<Package Folder>/shared_prefs/screenLock.xml
<Package Folder>/shared_prefs/screenLock.xml.bak
<Package Folder>/shared_prefs/umeng_general_config.xml
<Package Folder>/shared_prefs/umeng_general_config.xml.bak
<SD-Card>/Android/####/.nomedia

Miscellaneous:

Executes next shell scripts:

/system/bin/sh -c getprop
/system/bin/sh -c type su
<Package Folder>/app_bin/daemon -p <Package> -s com.solid.resident.ResidentService -t 30
chmod 0755 <Package Folder>/app_bin/daemon
getprop
sh /system/bin/am startservice --user 0 -n <Package>/com.solid.resident.ResidentService

Loads the following dynamic libraries:

Bugly

Uses the following algorithms to encrypt data:

AES-CBC-PKCS7Padding
AES-GCM-NoPadding
DES
RSA-ECB-PKCS1Padding

Uses the following algorithms to decrypt data:

AES-CBC-PKCS5Padding
AES-CBC-PKCS7Padding
AES-GCM-NoPadding
DES

Gains access to geolocation.

Gains access to network information.

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

Gains access to information about running applications.

Adds tasks to the system scheduler.

Displays its own windows over windows of other applications.

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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