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    Archive for the ‘Mobile’ Category




    Mobile users became alarmed after the discovery of an Android bug that was dubbed as the “Android Installer Hijacking vulnerability.” This flaw can allow cybercriminals to replace or modify legitimate apps with malicious versions that can steal information. Given the high profile nature of this discovery, we decided to search for threats that might exploit this vulnerability. A scanner app was released so that users can check if their mobile devices were affected by the Android Installer Hijacking vulnerability. We thought cybercriminals might take advantage of ...

    Posted in Malware, Mobile | Comments Off on Android Installer Hijacking Bug Used as Lure for Malware



    Just last month, there were reports that Google removed three apps from its Play Store as they were discovered to be adware in disguise. At the time of the discovery, the apps were said to have been downloaded into millions of devices, based on data from the app stores. However, these were not the only apps with similar behavior. During their investigation in early March, our researchers believe that there were over 2,000 apps with similar behavior on Google Play. However, this ...

    Posted in Malware, Mobile | Comments Off on The Fine Line Between Ad and Adware: A Closer Look at the MDash SDK



    Today, personal communication is greatly enabled and enhanced by various messaging apps that provide text messaging, voice calls, photo sharing, and even video chat. These apps are often found in smartphones—devices that have all the features of a desktop computer, plus Wi-Fi, cellular, GPS, and data connectivity. Cybercriminals have taken advantage of the convergence of the power of the smartphone and the features of chat apps to lure victims into compromising situations and blackmail them. Our latest paper, Sextortion in the Far East, talks at length ...

    Posted in Malware, Mobile | Comments Off on Sextortion in the Far East Includes Mobile Spyware



    Recently, we have noticed large numbers of repackaged Android apps showing up in Chinese app stores. While these apps pretend to be "free", in the end they cost the users time and money: they are either shown various ads or they are subscribed to various premium SMS numbers. (Note that these apps were not found in the official Google Play store.) Two channels are at work here. First, foreign apps that have been localized or repackaged by Chinese companies and used for ...

    Posted in Malware, Mobile | Comments Off on “Free” Apps In Chinese App Stores Put Users At Risk



    Today we're releasing our research paper on the operations of the Yanbian Gang—a Chinese cybercriminal group that use mobile malware to siphon off money from account holders of South Korean banks. They are able to transfer up to US$1,600 worth of local currency from victims’ accounts every single day since 2013. This investigation is the result of our continuous monitoring of the threat landscape. We are always on the lookout for new threats, and the Chinese underground is a particularly active source of these ...

    Posted in Mobile | Comments Off on Mobile Malware Gang Steals Millions from South Korean Users


     

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