Technical sophistication isn't the only form of sophistication. The attack is sophisticated in the trickery it employs to gains the user's trust and give the appearance of being legitimate. A security hole doesn't have to be an OS zero-day to be impressive.
Never mind that it's still easy as ever to phish by email since the protocol doesn't give any guarantees of anything, not even that the "From" field can be trusted; or that SMS sucks in a similar way; or that their PCs and Android/RIM phones still allow to install untrusted apps by default.
It's quite sophisticated indeed. The prompt to install the PC app happens when the user visits the bank's site. They manage to get the user phone number and send an SMS as if they are the bank. Everything appears legit from the user's point of view. It's shortsighted to blame it on the user.
* Phish the users. The user must fall for this attack.
* Prompt the user to MANUALLY download AND install an application on their pc.
* Then (if that's not enough) download and MANUALLY install an app on your phone.
That's a whole lot of poor decisions on the end user's part. I wouldn't be surprised if these user's wouldn't have just replied to an email with their account number and PIN. Better yet just ask them to mail you cash, seems like something they would do too.
Think people. C'mon.