A Downloader Trojan that runs on Android devices. It is a modification of the Trojan Android.DownLoader.818.origin. It was first detected on Google Play, distributed by the C8 Mobile developer as games.
When launched, the Trojan requests access rights to the SD card of the mobile device as well as administrator privileges. After being granted the privileges, Android.DownLoader.828.origin hides its icon from the apps list on the main screen. For that, it restricts the access to the activity that launches it.
Then the Trojan uses its own service to download the Addon.apk file from the server https://cdn.***rr.us and writes it to the external repository (an SD card or memory available on the mobile device). The file is the adware Trojan Android.HiddenAds.752, but other files can be downloaded too, depending on server setup.
After the download, Android.DownLoader.828.origin prompts the user to install it every 20 seconds with a standard system dialog. The dialog keeps showing until the owner of the affected device agrees to install the application.
Android.DownLoader.828.origin also registers a broadcast receiver that launches a Trojan service upon the following system events:
- android.net.conn.CONNECTIVITY_CHANGE — Internet connection or disconnection.
- android.intent.action.BOOT_COMPLETED — operating system loading.