Find the keybase setup (version 2.12.2) at https://35c3ctf.ccc.ac/uploads/keybase-vm-a4f723ef126f84162a324232b1cef696.tar.gz

The image files can be downloaded via torrent from https://35c3ctf.ccc.ac/uploads/e3a1407a71362380fe0bc91b91d8f43964ee51b4.7z.torrent and the password is the flag for "sanity check"