Initial commit for SendGrid responder

responders/SendGrid/SendGrid.json

@@ -0,0 +1,27 @@
+{
+  "name": "SendGrid",
+  "version": "1.0",
+  "author": "Equate Technologies",
+  "url": "https://github.com/TheHive-Project/Cortex-Analyzers",
+  "license": "AGPL-V3",
+  "description": "Send an email with information from a TheHive case or alert via SendGrid API over HTTPS",
+  "dataTypeList": ["thehive:case", "thehive:alert"],
+  "command": "SendGrid/SendGrid.py",
+  "baseConfig": "SendGrid",
+  "configurationItems": [
+    {
+      "name": "from",
+      "description": "Email address to use as the From: field",
+      "type": "string",
+      "multi": false,
+      "required": true
+    },
+    {
+      "name": "api_key",
+      "description": "SendGrid API key",
+      "type": "string",
+      "multi": false,
+      "required": true
+    }
+  ]
+}

responders/SendGrid/SendGrid.py

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+#!/usr/bin/env python3
+# encoding: utf-8
+
+from cortexutils.responder import Responder
+
+from sendgrid import SendGridAPIClient
+from sendgrid.helpers.mail import *
+
+import json
+
+class SendGrid(Responder):
+    def __init__(self):
+        Responder.__init__(self)
+        self.api_key = self.get_param('config.api_key', 'CHANGE_ME')
+        self.from_email = self.get_param('config.from', None, 'Missing sender email address')
+
+    def run(self):
+        Responder.run(self)
+
+        subject = self.get_param('data.title', None, 'title is missing')
+
+        # format and dump the data we received into them email for content.
+        # it's 2020, human operators should be able to parse JSON
+        content = Content("text/plain", json.dumps(self.get_param('data', None, 'no data to work with'), indent=2))
+        content = Content("text/html", '<pre>' + json.dumps(self.get_param('data', None, 'no data to work with'), indent=2) + '</pre>')
+
+        to_emails = []
+
+        if self.data_type == 'thehive:case':
+            # pull recipient addresses from tags where prefixed with mail:
+            # if multiple tags exist multiple deliveries will occur
+            tags = self.get_param('data.tags', None, 'recipient address not found in tags')
+
+            for t in tags:
+              if t.startswith('mail:'):
+                to_emails.append(To(t[5:]))
+
+            if to_emails == []:
+                self.error('recipient address not found in case tags')
+
+        elif self.data_type == 'thehive:alert':
+            # pull recipient address to email from artifacts?
+            # NOTE: this is an artifact from the original "Mailer" responder, WTF would we email any old observable address????
+            # have adjusted from Mailer behaviour, observable email address must be prefixed with "mail:" in the same way as case tags
+            artifacts = self.get_param('data.artifacts', None, 'recipient address not found in observables')
+
+            mail_artifacts = [a['data'] for a in artifacts if a.get('dataType') == 'mail' and 'data' in a]
+
+            for t in mail_artifacts:
+              if t.startswith('mail:'):
+                to_emails.append(To(t[5:]))
+
+            if to_emails == []:
+                self.error('recipient address not found in alert observables')
+        else:
+            self.error('Invalid data type %' % self.data_type)
+
+        if to_emails != []:
+            # build the message content that we'll deliver
+            message = Mail(Email(self.from_email), to_emails, subject, content)
+
+            try:
+                sg = SendGridAPIClient(self.api_key)
+                response = sg.send(message)
+
+                self.report({'message': 'message sent'})
+            except Exception as e:
+                self.report({'message': 'exception raised'})
+        else:
+            self.report({'message': 'no destination email addresses found'})
+
+    def operations(self, raw):
+        return [self.build_operation('AddTagToCase', tag='mail sent')]
+
+if __name__ == '__main__':
+    SendGrid().run()
+
+# EOF

responders/SendGrid/requirements.txt

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+sendgrid