Everyone wants to have a perfect selfie to share with friends or to post online, selfie filter camera apps are the one used to get perfect pictures.
Researchers from Wandera identified two malicious selfie adware apps that push intrusive ads to disrupt the user workflow. These apps enable its authors to make money from the affected devices by pushing ads.
These apps interrupt users workflow, capable of bricking their devices, drain out batters and it may also lead to device replacement. They found to have advanced functionality than the average adware apps.
Malicious App and Functionality
Sun Pro Beauty Camera and Funny Sweet Beauty Selfie Camera are the two apps observed with malicious functionality. They found downloaded 1.5M from the google play.
Once these apps installed on the device initially it shows in the app drawer, if they are opened then they create a shortcut and hides.
If the shortcut removed, it stays active and continues to run in the background, the following are the app behaviors.
Testing on SunPro Beauty Camera showed that even if the app is never opened and even after restarting the device, full-screen ads start to pop up that are difficult to close.
Testing on Funny Sweet Beauty Camera showed that the full-screen ads begin to appear outside of the app only when a filtered photo is downloaded via the app, locally on the device.
Both the apps having several negative reviews, as the app focuses on data-stealing instead of what it is intended for.
The malicious apps are packed with Ijiami packers, that used to prevent others from copying the source code. when compared to other packers Ijiami, goes a step further in replacing the original dex file, which makes unpacking process difficult.
Both the apps seek additional permission’s to stay stealthy and active
Sun Pro Beauty Camera permissions
RECORD_AUDIO – Allows the app to record audio at any time without user confirmation 033
INSTALL_SHORTCUT – Allows one part of the “stealthy” behavior
SYSTEM_ALERT_WINDOW – System alert window can allow the app to overlay some information and trick the user into clicking something he did not want
Funny Sweet Beauty Camera permissions
RECORD_AUDIO – Allows the app to record audio with the microphone. This permission allows the app to record audio at any time without your confirmation.
RECEIVE_BOOT_COMPLETED – Allows the app to activate after the phone is booted
SYSTEM_ALERT_WINDOW – Allows the app to display content over another app
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