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Malicious apps with >1 million downloads slip past Google defenses twice

September 14, 2017

Researchers recently found at least 50 apps in the official Google Play market that made charges for fee-based services without the knowledge or permission of users. The apps were downloaded as many as 4.2 million times. Google quickly removed the apps after the researchers reported them, but within days, apps from the same malicious family were back and infected more than 5,000 devices.

The apps, all from a family of malware that security firm Check Point calls ExpensiveWall, surreptitiously uploaded phone numbers, locations, and unique hardware identifiers to attacker-controlled servers.

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