Microsoft Sentinel Analytic Rules
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Contrast Suspicious

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Idf713404e-805c-4e0c-91fa-2c149f76a07d
RulenameContrast Suspicious
DescriptionCreates Incidents for Suspicious events sourced from the Contrast Protect agent.
SeverityMedium
TacticsInitialAccess
Exfiltration
TechniquesT1566
Required data connectorsContrastProtect
KindScheduled
Query frequency5m
Query period5m
Trigger threshold0
Trigger operatorgt
Source Urihttps://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Contrast Protect/Analytic Rules/ContrastSuspicious.yaml
Version1.0.0
Arm templatef713404e-805c-4e0c-91fa-2c149f76a07d.json
Deploy To Azure
let extract_data=(a:string, k:string) {
  parse_urlquery(replace(@';', @'&', a))["Query Parameters"][k]
};

CommonSecurityLog 
| where DeviceVendor == "Contrast Security"
| where AdditionalExtensions contains "SUSPICIOUS"
| extend DeviceProduct
| extend SourceIP
| extend DeviceVersion
| extend Activity
| extend ApplicationProtocol
| extend RequestURL
| extend RequestMethod
| extend Rule = extract_data(AdditionalExtensions, 'pri')
queryPeriod: 5m
version: 1.0.0
customDetails:
  Application: ApplicationProtocol
  Details: AdditionalExtensions
  Attack: Activity
  AgentVersion: DeviceVersion
  Agent: DeviceProduct
relevantTechniques:
- T1566
queryFrequency: 5m
kind: Scheduled
name: Contrast Suspicious
id: f713404e-805c-4e0c-91fa-2c149f76a07d
entityMappings:
- fieldMappings:
  - columnName: SourceIP
    identifier: Address
  entityType: IP
- fieldMappings:
  - columnName: RequestURL
    identifier: Url
  entityType: URL
- fieldMappings:
  - columnName: ApplicationProtocol
    identifier: Name
  entityType: CloudApplication
- fieldMappings:
  - columnName: Activity
    identifier: Name
  - columnName: Rule
    identifier: Category
  entityType: Malware
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Contrast Protect/Analytic Rules/ContrastSuspicious.yaml
severity: Medium
query: |
  let extract_data=(a:string, k:string) {
    parse_urlquery(replace(@';', @'&', a))["Query Parameters"][k]
  };

  CommonSecurityLog 
  | where DeviceVendor == "Contrast Security"
  | where AdditionalExtensions contains "SUSPICIOUS"
  | extend DeviceProduct
  | extend SourceIP
  | extend DeviceVersion
  | extend Activity
  | extend ApplicationProtocol
  | extend RequestURL
  | extend RequestMethod
  | extend Rule = extract_data(AdditionalExtensions, 'pri')  
tactics:
- InitialAccess
- Exfiltration
description: |
    'Creates Incidents for Suspicious events sourced from the Contrast Protect agent.'
requiredDataConnectors:
- connectorId: ContrastProtect
  dataTypes:
  - CommonSecurityLog
status: Available
triggerThreshold: 0
triggerOperator: gt
{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/f713404e-805c-4e0c-91fa-2c149f76a07d')]",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/f713404e-805c-4e0c-91fa-2c149f76a07d')]",
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules",
      "kind": "Scheduled",
      "apiVersion": "2022-11-01",
      "properties": {
        "displayName": "Contrast Suspicious",
        "description": "'Creates Incidents for Suspicious events sourced from the Contrast Protect agent.'\n",
        "severity": "Medium",
        "enabled": true,
        "query": "let extract_data=(a:string, k:string) {\n  parse_urlquery(replace(@';', @'&', a))[\"Query Parameters\"][k]\n};\n\nCommonSecurityLog \n| where DeviceVendor == \"Contrast Security\"\n| where AdditionalExtensions contains \"SUSPICIOUS\"\n| extend DeviceProduct\n| extend SourceIP\n| extend DeviceVersion\n| extend Activity\n| extend ApplicationProtocol\n| extend RequestURL\n| extend RequestMethod\n| extend Rule = extract_data(AdditionalExtensions, 'pri')\n",
        "queryFrequency": "PT5M",
        "queryPeriod": "PT5M",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0,
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "InitialAccess",
          "Exfiltration"
        ],
        "techniques": [
          "T1566"
        ],
        "alertRuleTemplateName": "f713404e-805c-4e0c-91fa-2c149f76a07d",
        "customDetails": {
          "AgentVersion": "DeviceVersion",
          "Attack": "Activity",
          "Details": "AdditionalExtensions",
          "Application": "ApplicationProtocol",
          "Agent": "DeviceProduct"
        },
        "entityMappings": [
          {
            "fieldMappings": [
              {
                "identifier": "Address",
                "columnName": "SourceIP"
              }
            ],
            "entityType": "IP"
          },
          {
            "fieldMappings": [
              {
                "identifier": "Url",
                "columnName": "RequestURL"
              }
            ],
            "entityType": "URL"
          },
          {
            "fieldMappings": [
              {
                "identifier": "Name",
                "columnName": "ApplicationProtocol"
              }
            ],
            "entityType": "CloudApplication"
          },
          {
            "fieldMappings": [
              {
                "identifier": "Name",
                "columnName": "Activity"
              },
              {
                "identifier": "Category",
                "columnName": "Rule"
              }
            ],
            "entityType": "Malware"
          }
        ],
        "status": "Available",
        "templateVersion": "1.0.0",
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Contrast Protect/Analytic Rules/ContrastSuspicious.yaml"
      }
    }
  ]
}