def rule(event):
    if all(
        [
            event.deep_get("SourceImage", default="").endswith("\\winword.exe"),
            ":\\Windows\\Microsoft.NET\\Framework64\\v2."
            in event.deep_get("CallTrace", default=""),
            "UNKNOWN" in event.deep_get("CallTrace", default=""),
        ]
    ):
        return True
    return False
