def rule(event):
    if all(
        [
            event.deep_get("EventID", default="") == 4768,
            event.deep_get("TicketEncryptionType", default="") == "0x17",
            event.deep_get("ServiceName", default="") == "krbtgt",
            event.deep_get("PreAuthType", default="") == 0,
        ]
    ):
        return True
    return False
