Here you will need to track down a vehicle that carries a data drive that needs to be stolen. Open your map and you will see the locations of all possible vehicles. As always, their locations will be randomized.
So all you can do is just follow each of them and use your SecuroServ hacking app on your mobile phone in order to identify the vehicle with the data drive. Be careful when following cars in this way, because if you will get too close, they will shoot at you.
When you've located the necessary car, you need to steal it and take it to the specified location for your reward.