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You can hack <target> using the Trojan drone, or board them, or nuke them. If you hack or nuke them, them be aware that ejected cargo containers have a 'lifetime'; if your pickup drones don't get there in time the looted containers will self-destruct.. so Therefore, make sure you have a suitable cargo ship capital ship with suitable cargo storage type and cargo drones nearby & available before you start this procedure!
In order to get your capital ship to collect cargo containers, you'll need to enter Cargo Collect mode (Return-1-2). After which. you'll be able to launch tags at containers within 1 km of the Skunk (just like in Mining mode). This will trigger your capital to send cargo drones out to pickup the loot and return it to the capital. Best attempted while not getting pummelled by station or ship guns! Unlike within Long Range Scanner mode, Cargo Collect mode does not offer a scanner. So in order to make finding containers easier, you'll want to set your radar to Battle Mode (shift+m) with no text overlay (shift+r) and avoid backdrops that pollute the colours out of the Event Monitor (e.g. the sun while in Glaring Truth). Battle Mode highlights cargo containers as single dots and after they're tagged, the dot turns into a nice little plus sign, letting you know you're being a good little pirate 
If you want the cash
CHECK FIRST using your scanner & target information system to see if there's a market for the ware(s) <target> is carrying! If the wares are unsellable (e.g. the weapon turret market is often saturated) then a lot of profit is lost immediately. HOWEVER you can still sell the ship with its cargo to a convenient shipyard to recoup at least some of the cargo's value* REMEMBER that you can always transfer excess unsellable wares to a ship that's going to be sold, provided it has an intact drone bay..
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