Two new campaigns using a malicious dropper to inject bankbot Banking Malware via play store apps and campaigns are dropping two different types of Banking Trojan.
This Bankbot Trojan distribution has been analyzed through one of a Playstore application called Tornado FlashLight.
Bankbot Malware Basically considering as too Risky one when its behavioral Intelligence Mimics as legitimate with existing Banking application and create a fake overlay which helps to steal the Credentials from Victims.
The first campaign drops a Bankbot malware and security one drops some different type of banking trojan that performs Android-based bank information stealer with legitimate-looking and with delayed onset of malicious activity.
Previously Discovered Bankbot malware contains more stealthy futures and more sophisticated functionality which performs background unknown clicks and performing app installation from unknown sources.
New dropped Bankbot trojan variant doesn’t perform any automatic tricks but if the user enables the unknown resources, then the user will promote to install the bankbot Malware.
How Does this Banking Malware Work
Initially, Dropper app and Malware downloaded and installed from third party location to the victims mobile.
Tornado FlashLight dropper (com.andrtorn.app) not discovered by Google’s Play Protect and it running by without interface unless the device is running suitable security software.
Once Dropper started to dropping the Malware, it will check all installed application against 160 Hardcoded apps.
if its find one or more of the targeted apps are installed when the dropper app is closed, it will start the service with dropper functionality.
Later, Dropper will check the device boot and once it succeeds then it will start the services and asking permission to gain admin access from the victim.
Once it obtains the admin level permission then it will Download the Bankbot Malware dropper from Command & Control Server (hxxp://188.8.131.52/kjsdf.tmp).
Downloaded malware will be triggered 2 hours after when the admin permission will be granted by the victim.
According to SfyLabs,Once the download is completed, the dropper will try to install the APK, using the standard Android mechanism to install applications from outside the Google Play store. Besides requiring unknown sources to be already enabled, this install method requires the user to press a button to continue the installation.
Later Dropper malware started by the dropper and listed banking apps with overlays trying to steal user credentials to perform fraud.
Source : GBHackers