# USB Capture ## Live Capture USB live capture is now possible, currently the following Audit Records exist: USB and USBRequestBlockSetup. To capture USB traffic live on macOS, install wireshark and bring up the USB interface: ``` $ sudo ifconfig XHC20 up ``` Now attach netcap and set baselayer to USB: ``` $ net.cap -iface XHC20 -base usb ``` ## Offline from dumpfile To read offline USB traffic from a PCAP file use: ``` $ net.cap -r usb.pcap -base usb ``` Don't forget to set the **-payload** flag if you want to preserve the data being transmitted! --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.netcap.io/v0.4.3/usb-capture.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.