Merge branch 'Crowdstrike-Sandbox-Analyzer' of https://github.com/foe…

…nyxxyneof/Cortex-Analyzers into foenyxxyneof-Crowdstrike-Sandbox-Analyzer

analyzers/FalconSandbox/FalconSandbox.json

@@ -0,0 +1,35 @@
+{
+  "name": "FalconSandbox",
+  "version": "1.0",
+  "author": "Sebastian Schmerl - Computacenter",
+  "url": "https://www.crowdstrike.com/blog/tech-center/get-access-falcon-apis/",
+  "license": "AGPL-v3",
+  "description": "Submit observables to the Crowdstrike FalconX Sandbox",
+  "dataTypeList": ["file"],
+  "command": "FalconSandbox/FalconSandbox.py",
+  "baseConfig": "FalconSandbox",
+  "configurationItems": [
+    {
+      "name": "API_Base_Url",
+      "description": "Crowdstrike Api Base Url",
+      "type": "string",
+      "multi": false,
+      "required": true,
+      "default":"https://api.crowdstrike.com"
+    },
+    {
+      "name": "Client_ID",
+      "description": "Crowdstrike Api ClientID",
+      "type": "string",
+      "multi": false,
+      "required": true
+    },
+    {
+      "name": "Client_Secret",
+      "description": "Crowdstrike Api Client Secret",
+      "type": "string",
+      "multi": false,
+      "required": true
+    }
+  ]
+}

analyzers/FalconSandbox/FalconSandbox.py

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+#!/usr/bin/env python3
+# encoding: utf-8
+
+
+import hashlib
+import json
+import time
+import traceback
+
+from cortexutils.analyzer import Analyzer
+from oauthlib.oauth2 import BackendApplicationClient
+from requests_oauthlib import OAuth2Session
+
+
+class FalconSandbox(Analyzer):
+    def __init__(self):
+        Analyzer.__init__(self)
+        self.Client_ID = self.get_param(
+            'config.Client_ID', None, "Falcon ClientID missing")
+        self.Client_Secret = self.get_param(
+            'config.Client_Secret', None, "Falcon Client_Secret missing")
+        self.API_Base_Url = self.get_param(
+            'config.API_Base_Url', None, "Falcon API Base URl missing")
+        self.client = BackendApplicationClient(client_id=self.Client_ID)
+        self.oauth = OAuth2Session(client=self.client)
+        self.token = self.oauth.fetch_token(token_url=self.API_Base_Url + "/oauth2/token", client_id=self.Client_ID, client_secret=self.Client_Secret)
+
+    def summary(self, raw):
+        taxonomies = []
+        namespace = "CS-Sandbox"
+        predicate = "Threat-Score"
+        value = str(raw['resources'][0]['sandbox'][0]['threat_score'])
+        level = str(
+            raw['resources'][0]['sandbox'][0]['verdict'])  # no verdict, No Specific Threat, suspicious, malicious
+
+        taxonomies.append(self.build_taxonomy(level, namespace, predicate, value))
+        return {"taxonomies": taxonomies}
+
+    def calc_sha256_hash(self, filepath):
+        buf_size = 65536  # lets read stuff in 64kb chunks!
+        l_sha256 = hashlib.sha256()
+        with open(filepath, 'rb') as f:
+            while True:
+                l_data = f.read(buf_size)
+                if not l_data:
+                    break
+                l_sha256.update(l_data)
+
+        l_own_sha256 = l_sha256.hexdigest()
+        return l_own_sha256
+
+    def rest_api_request(self, method, url, headers, data):
+        # get the get, post or delete method from the OAuth2Session object
+        method_to_call = getattr(self.oauth, method)
+
+        response = method_to_call(url, data=data, headers=headers)
+        l_json_response = json.loads(response.text)
+
+        if l_json_response["errors"] and l_json_response["errors"][0]["code"] == 403:
+            # ok, we need a new token
+            self.client = BackendApplicationClient(client_id=self.Client_ID)
+            self.oauth = OAuth2Session(client=self.client)
+            self.token = self.oauth.fetch_token(token_url=self.API_Base_Url + "/oauth2/token",
+                                                client_id=self.Client_ID, client_secret=self.Client_Secret)
+            # lets do it again with new token
+            response = method_to_call(url, data=data, headers=headers)
+            l_json_response = json.loads(response.text)
+
+        return l_json_response
+
+    def run(self):
+        try:
+            Analyzer.run(self)
+
+            filename = self.get_param("filename", "")
+            filepath = self.get_param("file", "")
+
+            l_file_hash_sha256 = self.calc_sha256_hash(filepath)
+
+            # get the latest report for file with sha256
+            url = self.API_Base_Url + \
+                  "/falconx/queries/submissions/v1?filter=sandbox.sha256:\"" + \
+                  l_file_hash_sha256 + \
+                  "\"&limit=1"
+            payload = {}
+            headers = {'Content-Type': 'application/json'}
+            json_response = self.rest_api_request(method="get", url=url, headers=headers, data=payload)
+
+            if json_response["errors"]:
+                self.error(str(json_response["errors"]))
+                return
+            else:
+                if not json_response["resources"]:
+                    # no scan reports exists for this file -> submit the file for analysis
+                    payload = open(filepath, "rb")
+                    headers = {'Content-Type': 'application/octet-stream'}
+                    url = self.API_Base_Url + \
+                          "/samples/entities/samples/v2?file_name=" + \
+                          filename + \
+                          "&comment=" + \
+                          "added by TheHive:FalconSandbox-Analyzer"
+                    json_response_submit = self.rest_api_request(method="post", url=url, data=payload, headers=headers)
+                    if json_response_submit["errors"]:
+                        self.error(str(json_response_submit["errors"]))
+                        return
+                    else:
+                        # start the analysis of the submitted file
+                        url = self.API_Base_Url + \
+                              "/falconx/entities/submissions/v1"
+                        headers = {'Content-Type': 'application/json'}
+                        payload = "{\"sandbox\": " \
+                                  "[{\"sha256\": \"" + \
+                                  l_file_hash_sha256 + \
+                                  "\",\"environment_id\": 110 }] }"
+                        json_response_start_analysis = self.rest_api_request(method="post", url=url, data=payload,
+                                                                             headers=headers)
+                        if json_response_start_analysis["errors"]:
+                            self.error(str(json_response_start_analysis["errors"]))
+                            return
+                        else:
+                            # now the file is submitted and analysis is started, let's get the report_id now
+                            url = self.API_Base_Url + \
+                                  "/falconx/queries/submissions/v1?filter=sandbox.sha256:\"" \
+                                  + l_file_hash_sha256 + \
+                                  "\"&limit=1"
+                            payload = {}
+                            headers = {'Content-Type': 'application/json'}
+                            report_found = 0
+                            while report_found == 0:
+                                json_response = self.rest_api_request(method="get", url=url, data=payload,
+                                                                      headers=headers)
+                                if json_response["errors"]:
+                                    self.error(str(json_response["errors"]))
+                                    return
+                                if not json_response["resources"]:
+                                    # still waiting for the report ID
+                                    time.sleep(60.0)
+                                    report_found = 0
+                                else:
+                                    # report_id is found
+                                    report_id = json_response["resources"][0]
+                                    report_found = 1
+                else:
+                    report_id = json_response["resources"][0]
+
+                analyzeinprogress = 1
+                while analyzeinprogress == 1:
+                    url = self.API_Base_Url + \
+                          "/falconx/entities/report-summaries/v1?ids=" + report_id
+                    payload = {}
+                    headers = {'Content-Type': 'application/json'}
+                    json_response_report = self.rest_api_request(method="get", url=url, data=payload, headers=headers)
+                    if json_response_report["errors"]:
+                        self.error(str(json_response_report["errors"]))
+                        return
+
+                    if not json_response_report["resources"] and \
+                            json_response_report["meta"]["quota"]["in_progress"] != 0:
+                        # still waiting for the analysis results
+                        time.sleep(60.0)
+                        analyzeinprogress = 1
+                    else:
+                        # report is ready
+                        analyzeinprogress = 0
+
+                if json_response_report["errors"]:
+                    self.error(str(json_response_report["errors"]))
+                    return
+                else:
+                    self.report(json_response_report)
+
+        except Exception as ex:
+            self.error(traceback.format_exc())
+
+
+if __name__ == '__main__':
+    FalconSandbox().run()

analyzers/FalconSandbox/long.html

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+<!-- General error  -->
+<div class="panel panel-danger" ng-if="!success">
+  <div class="panel-heading">
+    <strong>Crowdstrike FalconX Sandbox report for {{(artifact.data || artifact.attachment.name) | fang}}</strong>
+  </div>
+  <div class="panel-body">
+    {{results.errorMessage}}
+  </div>
+</div>
+
+<!-- Success -->
+<div class="panel panel-info" ng-if="success">
+    <div class="panel-heading">
+        <strong>CrowdStrike Falcon X Sandbox Report for {{(artifact.data || artifact.attachment.name) | fang}}</strong>
+    </div>
+    <div class="panel-body">
+        <a target="_blank" href="https://falcon.crowdstrike.com/intelligence/sandbox/report/{{content.resources[0].id}}/report-summary">Open the Crowdstrike Sandbox Report here</a>
+    </div>
+    <div class="panel-body" ng-repeat="sample in content.resources">
+
+        <div class="panel-body" ng-repeat="sandbox in sample.sandbox">
+            <div ng-repeat="(key, value) in sandbox">
+                <dl class="dl-horizontal">
+                    <dt>{{key}}</dt>
+                    <dd>
+                       <div ng-switch on="key">
+                            <div ng-switch-when="verdict">
+                                <span class="label" ng-class="{'label-info':value === 'no specific threat',
+					            'label-warning': value==='suspicious',
+					            'label-danger': value==='malicious',
+					            'label-success': value==='no verdict'}">
+					                {{value}}
+				                </span>
+                            </div>
+                            <div ng-switch-default>{{value}}</div>
+                        </div>
+                    </dd>
+                </dl>        
+            </div>
+	    </div>
+	</div>
+</div>

analyzers/FalconSandbox/requirements.txt

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+requests~=2.24.0
+cortexutils~=2.0.0
+urllib3~=1.25.9
+oauthlib~=3.1.0

analyzers/FalconSandbox/short.html

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+<span class="label" ng-repeat="t in content.taxonomies" ng-class="{'No Specific Threat': 'label-info', 'no verdict': 'label-success', 'suspicious': 'label-warning', 'malicious':'label-danger'}[t.level]">
+    {{t.namespace}}:{{t.predicate}}="{{t.value}}"
+</span>