Document:WildFire® Administrator’s Guide
request system wildfire-vm-image
Perform upgrades on the WF-500 appliance virtual machine (VM) sandbox images used to analyze files. To retrieve new VM images from the Palo Alto Networks Update Server, you must first download the image manually, host it on an SCP enabled server, and then retrieve the image from the appliance using the SCP client. After downloading the image to the appliance, you can then install it using this command.