How to stay safe from malicious Android appsĭespite Google’s best efforts, malicious apps often end up on the Play Store. Surprisingly, Harly is even capable of calling specific phone numbers when necessary and confirming subscriptions. The end result is that the victim is signed up for a subscription service without realizing it. The phone then switches from Wi-Fi to a mobile network and the malware contacts the C&C server to put together a list of subscriptions to sign up for.įrom here, Harly opens the subscription sites in an invisible window, enters a victim’s phone number, presses the required button and even enters any confirmation codes sent via text. Once installed, Harly collects information about a user’s device along with details about the mobile network they’re using. Signing victims up for subscription servicesĪlthough Joker and Harly work a bit differently under the hood, both malware strains are used to sign up users whose devices have been infected for expensive subscription services without their knowledge.
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