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 connectorsCefAma
ContrastProtect
ContrastProtectAma
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
Version1.0.2
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')
description: |
    'Creates Incidents for Suspicious events sourced from the Contrast Protect agent.'
status: Available
queryPeriod: 5m
triggerThreshold: 0
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Contrast Protect/Analytic Rules/ContrastSuspicious.yaml
id: f713404e-805c-4e0c-91fa-2c149f76a07d
kind: Scheduled
requiredDataConnectors:
- connectorId: ContrastProtect
  dataTypes:
  - CommonSecurityLog
- connectorId: ContrastProtectAma
  dataTypes:
  - CommonSecurityLog
- connectorId: CefAma
  dataTypes:
  - CommonSecurityLog
tactics:
- InitialAccess
- Exfiltration
severity: Medium
triggerOperator: gt
version: 1.0.2
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')  
name: Contrast Suspicious
queryFrequency: 5m
customDetails:
  Agent: DeviceProduct
  AgentVersion: DeviceVersion
  Application: ApplicationProtocol
  Attack: Activity
  Details: AdditionalExtensions
relevantTechniques:
- T1566
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
{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "apiVersion": "2024-01-01-preview",
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/f713404e-805c-4e0c-91fa-2c149f76a07d')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/f713404e-805c-4e0c-91fa-2c149f76a07d')]",
      "properties": {
        "alertRuleTemplateName": "f713404e-805c-4e0c-91fa-2c149f76a07d",
        "customDetails": {
          "Agent": "DeviceProduct",
          "AgentVersion": "DeviceVersion",
          "Application": "ApplicationProtocol",
          "Attack": "Activity",
          "Details": "AdditionalExtensions"
        },
        "description": "'Creates Incidents for Suspicious events sourced from the Contrast Protect agent.'\n",
        "displayName": "Contrast Suspicious",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "SourceIP",
                "identifier": "Address"
              }
            ]
          },
          {
            "entityType": "URL",
            "fieldMappings": [
              {
                "columnName": "RequestURL",
                "identifier": "Url"
              }
            ]
          },
          {
            "entityType": "CloudApplication",
            "fieldMappings": [
              {
                "columnName": "ApplicationProtocol",
                "identifier": "Name"
              }
            ]
          },
          {
            "entityType": "Malware",
            "fieldMappings": [
              {
                "columnName": "Activity",
                "identifier": "Name"
              },
              {
                "columnName": "Rule",
                "identifier": "Category"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Contrast Protect/Analytic Rules/ContrastSuspicious.yaml",
        "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",
        "severity": "Medium",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Exfiltration",
          "InitialAccess"
        ],
        "techniques": [
          "T1566"
        ],
        "templateVersion": "1.0.2",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}