Once you’ve connected your Android mobile phone to a computer with a USB cable to transfer files or something more complex, you’ve probably wondered if there’s a possibility that a virus could be transmitted from your computer to your mobile phone. Unfortunately, this is perfectly possible. In fact, there are malware programs that work just like that, and some may even commit bank fraud.
How viruses are transferred from your computer to your mobile phone
For example, the virus Trojan.Droipak, discovered long ago by Symantec, basically «installs» on your Windows PC as a DLL file. In addition, it creates a new system service to ensure that it always runs, even when the computer restarts. Once you’ve done that, download a malicious APK file to Android.Fakebank.B (named after Symantec) and ADB (Android debug bridge), a tool used to perform actions on an Android device via a remote server. DOS commands. .
When all this is done, the virus constantly executes the adb.exe install AV-cdk.apk command so that at any time an Android device is connected via USB cable to that infected PC, it will secretly install the APK . malicious on mobile.
SMS theft and bank fraud
This virus is believed to be designed to commit banking fraud, as it searches the mobile device for banking applications and suggests that the user uninstall them to be replaced with other fraudulent applications. On the other hand, it intercepts and steals SMS containing information about the authorization of transactions, which is the method of «authorization» used today by many banks. Obviously, this could also be directly related to stealing credit card numbers.
This virus has already been the cause of this type of problem with Korean banks and it is perfectly possible that a similar situation will be repeated in any other country.
How to protect yourself
Because the virus uses ADB to install its malicious APK on your Android mobile phone when connected to your computer, you need to keep USB debugging off on your device, because it is through this «door» (when enabled) why the APK virus he ends up slipping into his cell phone.
Based on the same argument above, you should be careful not to connect your mobile phone to any public computer or computer that could be infected with this or that similar type of virus.
Another security measure is to check installed applications for any suspicious items. For example, Trojan.Droidpak disguises itself in the Google Play Store app on Android, meaning it uses the same name and icon. If there are two Play Stores on your computer, you can already tell that one of them is a virus.
How to remove viruses from your Android device
Google has already said twice that Android does not need antivirus. Is it correct today?
How to protect my mobile phone from viruses, spies, interventions, etc.