Occasionally some trojans have been found on Android, but this is probably one of the worst. This new threat automates a $ 1000 PayPal transaction and sends it using the official PayPal application itself, even to two-point checking accounts (2FA).
This is done using different, up to date methods and utilizing Android accessibility services. The trojan is currently disguising itself as an Android optimization tool called Android Optimization and has reached out to users' phones through third-party stores. Apart from the official Play store there are also third party stores so beginner advice: do not use third-party stores. Use only Play Store.
When you install the “Optimization Android” program, a service called “Enable statistics” is created. Of course this service requests access to track user actions and retrieve it content of the windows.
But somewhere things get worse as the Trojan horse can imitate alerts. Creates a notice that looks like these PayPal that pushes the user to connect.
When you tap the notification, it opens the official PayPal app (if installed) and asks the user to sign in. As long as this is a legitimate attempt to log into the official Paypal app, 2FA does nothing to ensure the account you, in addition to sending you an additional code which when you insert it you will log in normally.
After logging in, the malware takes over the transfer of $1000 from your PayPal account to the attacker. This automated process happens in less than five seconds. ESET made a video of the whole process and it's pretty crazy how fast the whole process takes place:
Once you understand what is happening, it is too late to stop. The only thing that stops the process is that maybe your balance on PayPal is too low and you have not added other funding methods. So, Paypal simply cancels the transaction due to lack of money. Otherwise, you should find out within a week and make a "non-acceptance transaction" on Paypal, asking it to investigate and cancel the transaction, a process that takes at least 1 month.
But it does not end there. Not only does this trojan attack a user's PayPal account, but it also uses Android Screen Overlay to place illegal login screens on legitimate applications.
The trojan displays HTML overlay screens on Google Play, WhatsApp, Skype and Viber and then uses them toslowcredit card details. It can also create a Gmail overlay, stealing the user's login credentials.
While the overlay attack is currently limited to the above-mentioned applications, the list could be updated at any time, which means that this type of attack can be expanded at any point to steal any type of information the attacker wants. ESET We Live Security emphasizes that the attacker could explore other options by using the overlay
