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Google Play’s malicious app problem infects 1.7 million more devices

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Google Play, the company’s official repository for Android apps, has once again been caught hosting fraudulent and potentially malicious apps, with the discovery of more than 56 apps—many of them for children—that were installed on almost 1.7 million devices.

Tekya is a family of malware that generates fraudulent clicks on ads and banners delivered by agencies including Google’s AdMob, AppLovin’, Facebook, and Unity. To give the clicks the air of authenticity, the well-obfuscated code causes infected devices to use Android’s “MotionEvent” mechanism to imitate legitimate user actions. At the time that researchers from security firm Check Point discovered them, the apps went undetected by VirusTotal and Google Play Protect. Twenty-four of the apps that contained Tekya were marketed to children. Google removed all 56 of the apps after Check Point reported them.

The discovery “highlights once again that the Google Play Store can still host malicious apps,” Check Point researchers Israel Wernik, Danil Golubenko, and Aviran Hazum wrote in a post published on Tuesday. “There are nearly 3 million apps available from the store, with hundreds of new apps being uploaded daily–making it difficult to check that every single app is safe. Thus, users cannot rely on Google Play’s security measures alone to ensure their devices are protected.”

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