CallJam Android malware made it in the Play Store




Keeping the device the user free from pests, these are the challenges of the producers. Almost every day we encounter horror stories that tell of malware or vulnerabilities on various platforms. Legal transparent comes at a monthly Google. The bulletins provide education on what vulnerabilities have been found and closed. But not only in the system as such lurks the danger. Instead, in rare cases, the stores in the message when it creates by a malicious app, unnoticed to land there.


So the recent ones in the app “Gems Chest for Clash Royale”, which promised the users of the popular game Clash Royale free gems for their game. In the app hidden: the malware CallJam. You can not only ensure that the user is bombarded with advertisements, in the worst case, the app uses a premium dialer to call international calls to premium numbers.

To perform this action requires an app the appropriate rights. If they are not granted, not even a phone call can be initiated. The security researchers from Checkpoint are of opinion that many users simply grant permissions – either because they do not read or do not understand. The malware was allegedly downloaded 100000-500000 times in the Play Store, reaching good reviews.

How was that possible? Before the app started its harmful activity, they still asked for a good evaluation. In return, users should get to the review more goodies donated. Google has now responded and remove the app.


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