GCP IAM - High privileged role added to service account

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Id	86112c4b-2535-4178-aa0e-ed9e32e3f054
Rulename	GCP IAM - High privileged role added to service account
Description	Detects when high privileged role was added to service account.
Severity	High
Tactics	PrivilegeEscalation
Techniques	T1078
Required data connectors	GCPIAMDataConnector
Kind	Scheduled
Query frequency	15m
Query period	15m
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/GoogleCloudPlatformIAM/Analytic Rules/GCPIAMHighPrivilegedRoleAdded.yaml
Version	1.0.1
Arm template	86112c4b-2535-4178-aa0e-ed9e32e3f054.json

KQL

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])

YAML

description: |
    'Detects when high privileged role was added to service account.'
version: 1.0.1
tactics:
- PrivilegeEscalation
queryFrequency: 15m
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])  
status: Available
triggerOperator: gt
kind: Scheduled
triggerThreshold: 0
relevantTechniques:
- T1078
id: 86112c4b-2535-4178-aa0e-ed9e32e3f054
queryPeriod: 15m
entityMappings:
- fieldMappings:
  - identifier: FullName
    columnName: PayloadAuthenticationinfoPrincipalemail
  - identifier: Name
    columnName: AccountName
  - identifier: UPNSuffix
    columnName: AccountUPNSuffix
  entityType: Account
- fieldMappings:
  - identifier: Address
    columnName: SrcIpAddr
  entityType: IP
severity: High
name: GCP IAM - High privileged role added to service account
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/GoogleCloudPlatformIAM/Analytic Rules/GCPIAMHighPrivilegedRoleAdded.yaml
requiredDataConnectors:
- dataTypes:
  - GCP_IAM
  connectorId: GCPIAMDataConnector

ARM