If you still need the exact 10.13.1 build for archival purposes, treat any third-party download like a vintage car: inspect it carefully before running, and never connect it to the internet unprotected.
Following the public launch of macOS High Sierra 10.13 in September 2017, Apple quickly rolled out the first major point update, version 10.13.1. While not a feature-packed overhaul, this update focused on stability, security, and crucial bug fixes—including patching the infamous . macos high sierra 10.13.1 dmg
Released: October 31, 2017 Build: 17B48