GCP IAM - High privileged role added to service account

let privileged_roles = dynamic(['roles/iam.securityAdmin', 'roles/secretmanager.admin', 'roles/secretmanager.secretAccessor', 'roles/apigateway.admin', 'roles/logging.admin', 'roles/iam.organizationRoleAdmin', 'roles/iam.roleAdmin', 'roles/iam.serviceAccountAdmin', 'roles/iam.serviceAccountCreator', 'roles/iam.serviceAccountKeyAdmin']);
GCP_IAM
| where PayloadMethodname =~ 'SetIamPolicy'
| extend action = parse_json(todynamic(PayloadServicedataPolicydeltaBindingdeltas))[0]['action']
| where action =~ 'ADD'
| extend role = parse_json(todynamic(PayloadServicedataPolicydeltaBindingdeltas))[0]['role']
| where role in~ (privileged_roles)
| project-away action
| extend AccountName = tostring(split(PayloadAuthenticationinfoPrincipalemail, "@")[0]), AccountUPNSuffix = tostring(split(PayloadAuthenticationinfoPrincipalemail, "@")[1])

name: GCP IAM - High privileged role added to service account
triggerOperator: gt
query: |
  let privileged_roles = dynamic(['roles/iam.securityAdmin', 'roles/secretmanager.admin', 'roles/secretmanager.secretAccessor', 'roles/apigateway.admin', 'roles/logging.admin', 'roles/iam.organizationRoleAdmin', 'roles/iam.roleAdmin', 'roles/iam.serviceAccountAdmin', 'roles/iam.serviceAccountCreator', 'roles/iam.serviceAccountKeyAdmin']);
  GCP_IAM
  | where PayloadMethodname =~ 'SetIamPolicy'
  | extend action = parse_json(todynamic(PayloadServicedataPolicydeltaBindingdeltas))[0]['action']
  | where action =~ 'ADD'
  | extend role = parse_json(todynamic(PayloadServicedataPolicydeltaBindingdeltas))[0]['role']
  | where role in~ (privileged_roles)
  | project-away action
  | extend AccountName = tostring(split(PayloadAuthenticationinfoPrincipalemail, "@")[0]), AccountUPNSuffix = tostring(split(PayloadAuthenticationinfoPrincipalemail, "@")[1])
queryFrequency: 15m
description: |
  'Detects when high privileged role was added to service account.'
id: 86112c4b-2535-4178-aa0e-ed9e32e3f054
triggerThreshold: 0
queryPeriod: 15m
version: 1.0.1
kind: Scheduled
status: Available
severity: High
requiredDataConnectors:
- connectorId: GCPIAMDataConnector
  dataTypes:
  - GCP_IAM
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/GoogleCloudPlatformIAM/Analytic%20Rules/GCPIAMHighPrivilegedRoleAdded.yaml
relevantTechniques:
- T1078
tactics:
- PrivilegeEscalation
entityMappings:
- fieldMappings:
  - identifier: FullName
    columnName: PayloadAuthenticationinfoPrincipalemail
  - identifier: Name
    columnName: AccountName
  - identifier: UPNSuffix
    columnName: AccountUPNSuffix
  entityType: Account
- fieldMappings:
  - identifier: Address
    columnName: SrcIpAddr
  entityType: IP

{
  "$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/86112c4b-2535-4178-aa0e-ed9e32e3f054')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/86112c4b-2535-4178-aa0e-ed9e32e3f054')]",
      "properties": {
        "alertRuleTemplateName": "86112c4b-2535-4178-aa0e-ed9e32e3f054",
        "customDetails": null,
        "description": "'Detects when high privileged role was added to service account.'\n",
        "displayName": "GCP IAM - High privileged role added to service account",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "PayloadAuthenticationinfoPrincipalemail",
                "identifier": "FullName"
              },
              {
                "columnName": "AccountName",
                "identifier": "Name"
              },
              {
                "columnName": "AccountUPNSuffix",
                "identifier": "UPNSuffix"
              }
            ]
          },
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "SrcIpAddr",
                "identifier": "Address"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/GoogleCloudPlatformIAM/Analytic%20Rules/GCPIAMHighPrivilegedRoleAdded.yaml",
        "query": "let privileged_roles = dynamic(['roles/iam.securityAdmin', 'roles/secretmanager.admin', 'roles/secretmanager.secretAccessor', 'roles/apigateway.admin', 'roles/logging.admin', 'roles/iam.organizationRoleAdmin', 'roles/iam.roleAdmin', 'roles/iam.serviceAccountAdmin', 'roles/iam.serviceAccountCreator', 'roles/iam.serviceAccountKeyAdmin']);\nGCP_IAM\n| where PayloadMethodname =~ 'SetIamPolicy'\n| extend action = parse_json(todynamic(PayloadServicedataPolicydeltaBindingdeltas))[0]['action']\n| where action =~ 'ADD'\n| extend role = parse_json(todynamic(PayloadServicedataPolicydeltaBindingdeltas))[0]['role']\n| where role in~ (privileged_roles)\n| project-away action\n| extend AccountName = tostring(split(PayloadAuthenticationinfoPrincipalemail, \"@\")[0]), AccountUPNSuffix = tostring(split(PayloadAuthenticationinfoPrincipalemail, \"@\")[1])\n",
        "queryFrequency": "PT15M",
        "queryPeriod": "PT15M",
        "severity": "High",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "PrivilegeEscalation"
        ],
        "techniques": [
          "T1078"
        ],
        "templateVersion": "1.0.1",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}