mirror of https://github.com/MISP/misp-modules
90 lines
2.4 KiB
Python
90 lines
2.4 KiB
Python
"""vt_graph_parser.helpers.parsers.
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This module provides parsers for MISP inputs.
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"""
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from lib.vt_graph_parser.helpers.wrappers import MispAttribute
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MISP_INPUT_ATTR = [
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"hostname",
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"domain",
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"ip-src",
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"ip-dst",
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"md5",
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"sha1",
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"sha256",
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"url",
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"filename|md5",
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"filename",
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"target-user",
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"target-email"
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]
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VIRUSTOTAL_GRAPH_LINK_PREFIX = "https://www.virustotal.com/graph/"
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def _parse_data(attributes, objects):
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"""Parse MISP event attributes and objects data.
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Args:
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attributes (dict): dictionary which contains the MISP event attributes data.
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objects (dict): dictionary which contains the MISP event objects data.
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Returns:
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([MispAttribute], str): MISP attributes and VTGraph link if exists.
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Link defaults to "".
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"""
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attributes_data = []
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vt_graph_link = ""
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# Get simple MISP event attributes.
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attributes_data += (
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[attr for attr in attributes
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if attr.get("type") in MISP_INPUT_ATTR])
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# Get attributes from MISP objects too.
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if objects:
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for object_ in objects:
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object_attrs = object_.get("Attribute", [])
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attributes_data += (
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[attr for attr in object_attrs
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if attr.get("type") in MISP_INPUT_ATTR])
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# Check if there is any VirusTotal Graph computed in MISP event.
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vt_graph_links = (
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attr for attr in attributes if attr.get("type") == "link"
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and attr.get("value", "").startswith(VIRUSTOTAL_GRAPH_LINK_PREFIX))
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# MISP could have more than one VirusTotal Graph, so we will take
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# the last one.
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current_id = 0 # MISP attribute id is the number of the attribute.
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vt_graph_link = ""
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for link in vt_graph_links:
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if int(link.get("id")) > current_id:
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current_id = int(link.get("id"))
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vt_graph_link = link.get("value")
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attributes = [
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MispAttribute(data["type"], data["category"], data["value"])
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for data in attributes_data]
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return (attributes,
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vt_graph_link.replace(VIRUSTOTAL_GRAPH_LINK_PREFIX, ""))
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def parse_pymisp_response(payload):
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"""Get event attributes and VirusTotal Graph id from pymisp response.
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Args:
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payload (dict): dictionary which contains pymisp response.
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Returns:
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([MispAttribute], str): MISP attributes and VTGraph link if exists.
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Link defaults to "".
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"""
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event_attrs = payload.get("Attribute", [])
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objects = payload.get("Object")
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return _parse_data(event_attrs, objects)
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