You have to copy the information currently stored on the phone into that VM (assuming they even have such a VM and wouldn't need months to develop it) The phone's hardware is designed to make that difficult, it is more than just copying the data that's in the flash. You would at minimum need to decap two chips and read the two IDs that make up the separate halves of the encryption key using an electron microscope. On newer phones than the 5c at issue here, you'd need to compromise the secure enclave, which is probably designed using tamper proof methods meaning you'd have to do this work in an unlit vacuum.
Biting the hand that feeds IT
