def rule(event):
    if all(
        [
            event.deep_get("c-useragent", default="").startswith("Microsoft BITS/"),
            not any(
                [
                    event.deep_get("cs-host", default="").endswith(".com"),
                    event.deep_get("cs-host", default="").endswith(".net"),
                    event.deep_get("cs-host", default="").endswith(".org"),
                    event.deep_get("cs-host", default="").endswith(".scdn.co"),
                    event.deep_get("cs-host", default="").endswith(".sfx.ms"),
                ]
            ),
        ]
    ):
        return True
    return False
