Trojan:Android/Fakeinst malware appear to be installers for other applications; when executed however, the malware send SMS messages to premium-rate numbers or services.
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Variants in the Fakeinst malware family appear to be installers for various (possibly legitimate) applications. While active however, the Trojans send SMS messages to premium rate phone numbers or a subscription-based paid service.
The core functionalities of the variants are very similar, with only slight variations in the implementation and code . for instance, one variant uses single SMS sending, whereas a later variant may use asynchronous and threaded SMS sending.
These Trojans are widely distributed and use randomization techniques to evade detection by antivirus products.