lastline_query.py

#!/usr/bin/env python3
"""
Module (type "expansion") to query a Lastline report from an analysis link.
"""
import json
import lastline_api
from . import check_input_attribute, checking_error, standard_error_message


misperrors = {
    "error": "Error",
}

mispattributes = {
    "input": [
        "link",
    ],
    "output": ["text"],
    "format": "misp_standard",
}

moduleinfo = {
    "version": "0.1",
    "author": "Stefano Ortolani",
    "description": "Get a Lastline report from an analysis link.",
    "module-type": ["expansion"],
}

moduleconfig = [
    "username",
    "password",
    "verify_ssl",
]


def introspection():
    return mispattributes


def version():
    moduleinfo["config"] = moduleconfig
    return moduleinfo


def handler(q=False):
    if q is False:
        return False

    request = json.loads(q)

    # Parse the init parameters
    try:
        config = request["config"]
        auth_data = lastline_api.LastlineAbstractClient.get_login_params_from_dict(config)
        if not request.get('attribute') or not check_input_attribute(request['attribute'], requirements=('type', 'value')):
            return {'error': f'{standard_error_message}, {checking_error} that is the link to a Lastline analysis.'}
        analysis_link = request['attribute']['value']
        # The API url changes based on the analysis link host name
        api_url = lastline_api.get_portal_url_from_task_link(analysis_link)
    except Exception as e:
        misperrors["error"] = "Error parsing configuration: {}".format(e)
        return misperrors

    # Parse the call parameters
    try:
        task_uuid = lastline_api.get_uuid_from_task_link(analysis_link)
    except (KeyError, ValueError) as e:
        misperrors["error"] = "Error processing input parameters: {}".format(e)
        return misperrors

    # Make the API calls
    try:
        api_client = lastline_api.PortalClient(api_url, auth_data, verify_ssl=config.get('verify_ssl', True).lower() in ("true"))
        response = api_client.get_progress(task_uuid)
        if response.get("completed") != 1:
            raise ValueError("Analysis is not finished yet.")

        response = api_client.get_result(task_uuid)
        if not response:
            raise ValueError("Analysis report is empty.")

    except Exception as e:
        misperrors["error"] = "Error issuing the API call: {}".format(e)
        return misperrors

    # Parse and return
    result_parser = lastline_api.LastlineResultBaseParser()
    result_parser.parse(analysis_link, response)

    event = result_parser.misp_event
    event_dictionary = json.loads(event.to_json())

    return {
        "results": {
            key: event_dictionary[key]
            for key in ('Attribute', 'Object', 'Tag')
            if (key in event and event[key])
        }
    }


if __name__ == "__main__":
    """Test querying information from a Lastline analysis link."""
    import argparse
    import configparser

    parser = argparse.ArgumentParser()
    parser.add_argument("-c", "--config-file", dest="config_file")
    parser.add_argument("-s", "--section-name", dest="section_name")
    args = parser.parse_args()
    c = configparser.ConfigParser()
    c.read(args.config_file)
    a = lastline_api.LastlineAbstractClient.get_login_params_from_conf(c, args.section_name)

    j = json.dumps(
        {
            "config": a,
            "attribute": {
                "value": (
                    "https://user.lastline.com/portal#/analyst/task/"
                    "1fcbcb8f7fb400100772d6a7b62f501b/overview"
                )
            }
        }
    )
    print(json.dumps(handler(j), indent=4, sort_keys=True))

    j = json.dumps(
        {
            "config": a,
            "attribute": {
                "value": (
                    "https://user.lastline.com/portal#/analyst/task/"
                    "f3c0ae115d51001017ff8da768fa6049/overview"
                )
            }
        }
    )
    print(json.dumps(handler(j), indent=4, sort_keys=True))