If you are bothered by inappropriate ads: displaying ads on the lock screen, displaying ads when not using any application, ... then you are probably having problems with BeTaAds Plugin

BeiTaAd is a well-obfuscated advertising plugin hidden within a number of popular applications in Google Play. The plugin forcibly displays ads on the user’s lock screen, triggers video and audio advertisements even while the phone is asleep, and displays out-of-app ads that interfere with a user’s interaction with other applications on their device.

Lookout has discovered 238 unique applications that include BeiTaPlugin, adware that renders a mobile device nearly unusable, in the Google Play Store. Lookout reported the malicious functionality to Google and the BeiTaPlugin has now been removed from all the affected apps on the Play store. Cumulatively, these applications amount to over 440 million installations, making this family unique in its prevalence and the level of obfuscation used to hide the plugin’s existence.

While the vast majority of free mobile applications monetize their apps through Ad SDKs or plugins, the persistence of the advertisements in this particular family and the lengths to which the developer went to hide its existence make the BeiTaPlugin concerning.

Source blog: https://blog.lookout.com/beitaplugin-adware by Kristina Balaam

*** APP NEED INTERNET CONNECTION WHEN SCANNING ***
★★★ MAIN FEATURES ★★★
★ Scan your device and find out which apps are in the list containing (or containing) BeiTaPlugin
★ Provide information to help users decide whether or not to remove those applications
★ Check whether those applications exist on the app store.
★ Provide 3 levels of alert: Blue, Yellow and Red for each scanned application