The O. MG USB cable comes with USB-C or Lightning tips and costs $120. If that seems extraordinarily expensive for a USB cable, it's because this one was made by security researcher MG and has WiFi, records everything the user does (up to 650,000 keystrokes), and has an optional long-distance wireless radio trigger to control it with and deliver payloads. Vice bought one and checked it out.
"There were people who said that Type C cables were safe from this type of implant because there isn't enough space. So, clearly, I had to prove that wrong. :)," MG told Motherboard in an online chat. … "We tested this out in downtown Oakland and were able to trigger payloads at over 1 mile," he added.
You might be able to tell it's not a true Apple cable from the sheen of the plastic or sheathing, perhaps, but there is no external indication at all that it's anything other than a bog standard cable.