oui.txt has "suddenly" appeared. I don't know how/why.

It's 4.1MB, so it's probably this: https://linuxnet.ca/ieee/oui/

Sanitized oui.txt Wed, 12 Feb 2020 03:10:16 -0400 • 4.1 MB (4,050,564 bytes) • ASCII

The result of ls -le@ oui.txtis:

$: ls -le@ oui.txt
-rw-r--r--@ 1 user staff 4047610 31 Jan 12:20 oui.txt
        com.apple.TextEncoding 15
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  • Have you run any software / web-based network mapping apps lately? – IconDaemon Feb 12 at 22:29
  • @klanomath com.apple.TextEncoding 15 – Jonny Nott Feb 14 at 13:11
  • @JonnyNott In my opinion it's related to some dev tool (e.g. npm oui), a network tool like Wireshark or nmap or some misdirected php command (downloading oui.txt to your home folder accidentially). – klanomath Feb 14 at 13:22
  • I've deleted it. Hopefully all will be ok! – Jonny Nott 19 hours ago

I have a file on my computer named utils6.py. The top of the file has this comment section.

This file is part of Scapy See http://www.secdev.org/projects/scapy for more informations Copyright (C) Philippe Biondi This program is published under a GPLv2 license

Copyright (C) 2005 Guillaume Valadon
Arnaud Ebalard

The code has Utility functions for IPv6.

This utility script outputs a file called oui.txt

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