BitSight - compromised systems detected

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Id	d68b758a-b117-4cb8-8e1d-dcab5a4a2f21
Rulename	BitSight - compromised systems detected
Description	Rule helps to detect whenever there is a compromised systems found in BitSight.
Severity	Medium
Tactics	Execution
Required data connectors	BitSight
Kind	Scheduled
Query frequency	1d
Query period	24h
Trigger threshold	0
Trigger operator	GreaterThan
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/BitSight/Analytic Rules/BitSightCompromisedSystemsDetected.yaml
Version	1.0.0
Arm template	d68b758a-b117-4cb8-8e1d-dcab5a4a2f21.json

KQL

let timeframe = 24h;
BitSightFindingsData
| where ingestion_time() > ago(timeframe)
| where RiskCategory == "Compromised Systems"
| extend Severity = toreal(Severity)
| extend Severity = case( Severity <= 6.9 and Severity >= 4.0, "Low",
                          Severity <= 8.9 and Severity >= 7.0, "Medium",
                          Severity <= 10.0 and Severity >= 9.0, "High",
                          "Informational")
| project FirstSeen, CompanyName, Severity, RiskCategory, RiskVector, TemporaryId

YAML

severity: Medium
incidentConfiguration:
  createIncident: true
requiredDataConnectors:
- dataTypes:
  - BitSightFindingsData
  connectorId: BitSight
alertDetailsOverride:
  alertSeverityColumnName: Severity
  alertDescriptionFormat: 'Alert is generated for {{CompanyName}}.\n\nRisk Vector: {{RiskVector}}\nTemporaryId: {{TemporaryId}}\nRisk Category: Compromised Systems'
  alertDisplayNameFormat: 'BitSight: Alert for {{RiskVector}} in {{CompanyName}} from BitSight'
id: d68b758a-b117-4cb8-8e1d-dcab5a4a2f21
tactics:
- Execution
queryFrequency: 1d
eventGroupingSettings:
  aggregationKind: AlertPerResult
triggerOperator: GreaterThan
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/BitSight/Analytic Rules/BitSightCompromisedSystemsDetected.yaml
description: |
    'Rule helps to detect whenever there is a compromised systems found in BitSight.'
triggerThreshold: 0
kind: Scheduled
name: BitSight - compromised systems detected
query: |
  let timeframe = 24h;
  BitSightFindingsData
  | where ingestion_time() > ago(timeframe)
  | where RiskCategory == "Compromised Systems"
  | extend Severity = toreal(Severity)
  | extend Severity = case( Severity <= 6.9 and Severity >= 4.0, "Low",
                            Severity <= 8.9 and Severity >= 7.0, "Medium",
                            Severity <= 10.0 and Severity >= 9.0, "High",
                            "Informational")
  | project FirstSeen, CompanyName, Severity, RiskCategory, RiskVector, TemporaryId  
entityMappings:
- entityType: Malware
  fieldMappings:
  - columnName: RiskVector
    identifier: Name
  - columnName: RiskCategory
    identifier: Category
status: Available
version: 1.0.0
queryPeriod: 24h

ARM

{
  "$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/d68b758a-b117-4cb8-8e1d-dcab5a4a2f21')]",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/d68b758a-b117-4cb8-8e1d-dcab5a4a2f21')]",
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules",
      "kind": "Scheduled",
      "apiVersion": "2022-11-01-preview",
      "properties": {
        "displayName": "BitSight - compromised systems detected",
        "description": "'Rule helps to detect whenever there is a compromised systems found in BitSight.'\n",
        "severity": "Medium",
        "enabled": true,
        "query": "let timeframe = 24h;\nBitSightFindingsData\n| where ingestion_time() > ago(timeframe)\n| where RiskCategory == \"Compromised Systems\"\n| extend Severity = toreal(Severity)\n| extend Severity = case( Severity <= 6.9 and Severity >= 4.0, \"Low\",\n                          Severity <= 8.9 and Severity >= 7.0, \"Medium\",\n                          Severity <= 10.0 and Severity >= 9.0, \"High\",\n                          \"Informational\")\n| project FirstSeen, CompanyName, Severity, RiskCategory, RiskVector, TemporaryId\n",
        "queryFrequency": "P1D",
        "queryPeriod": "PT24H",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0,
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Execution"
        ],
        "alertRuleTemplateName": "d68b758a-b117-4cb8-8e1d-dcab5a4a2f21",
        "incidentConfiguration": {
          "createIncident": true
        },
        "eventGroupingSettings": {
          "aggregationKind": "AlertPerResult"
        },
        "alertDetailsOverride": {
          "alertSeverityColumnName": "Severity",
          "alertDescriptionFormat": "Alert is generated for {{CompanyName}}.\\n\\nRisk Vector: {{RiskVector}}\\nTemporaryId: {{TemporaryId}}\\nRisk Category: Compromised Systems",
          "alertDisplayNameFormat": "BitSight: Alert for {{RiskVector}} in {{CompanyName}} from BitSight"
        },
        "customDetails": null,
        "entityMappings": [
          {
            "fieldMappings": [
              {
                "identifier": "Name",
                "columnName": "RiskVector"
              },
              {
                "identifier": "Category",
                "columnName": "RiskCategory"
              }
            ],
            "entityType": "Malware"
          }
        ],
        "status": "Available",
        "templateVersion": "1.0.0",
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/BitSight/Analytic Rules/BitSightCompromisedSystemsDetected.yaml"
      }
    }
  ]
}