One observation, and where it came from.
fin-034 fetched build 7.4.11 from the vendor update endpoint at 192.0.2.30 — signed, on schedule, and indistinguishable from every other Tuesday
This observation is part of a written scenario. It did not come off a real network, and nothing on this deployment did.
{
"kind": "security",
"detection_type": "software_update_fetched",
"principal": "192.0.2.30->fin-034:443",
"source_address": null,
"asset": null,
"confidence": 0.99
}