TFTP Boot File Request - Possible Bootkit Delivery

Darshan Thummar@Mighty

•updated Jun 11, 2026•0•0•4

This rule detects a TFTP (Trivial File Transfer Protocol) boot file request. Specifically, it looks for UDP traffic destined for port 69 (the standard TFTP port) on the home network, containing the byte sequence "|00 01|" at a depth of 2 bytes. This pattern is characteristic of a TFTP read request (opcode 1). The rule's message suggests this could indicate a possible bootkit delivery attempt, as TFTP is often used in network booting scenarios.