.ULZ File Extension

Contains data captured by USBlyzer, a USB protocol analysis program; contains a hierarchy of connected USB devices with descriptive information about each device.

Information captured by a ULZ file includes IRP and URB structures data, transfer buffer contents, and device and driver object names. May also contain information about USB-related requests, I/O request packets, and incoming and outgoing USB traffic.

ULZ files can be exported by USBlyzer for future reference.