GCP_IAM
| where isempty(HttpUserAgentOriginal)
| extend AccountName = tostring(split(PayloadAuthenticationinfoPrincipalemail, "@")[0]), AccountUPNSuffix = tostring(split(PayloadAuthenticationinfoPrincipalemail, "@")[1])
name: GCP IAM - Empty user agent
version: 1.0.1
severity: Medium
queryFrequency: 1h
triggerOperator: gt
relevantTechniques:
- T1550
status: Available
description: |
'Detects requests where user agent is empty.'
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/GoogleCloudPlatformIAM/Analytic Rules/GCPIAMEmptyUA.yaml
requiredDataConnectors:
- connectorId: GCPIAMDataConnector
dataTypes:
- GCP_IAM
entityMappings:
- fieldMappings:
- identifier: FullName
columnName: PayloadAuthenticationinfoPrincipalemail
- identifier: Name
columnName: AccountName
- identifier: UPNSuffix
columnName: AccountUPNSuffix
entityType: Account
- fieldMappings:
- identifier: Address
columnName: SrcIpAddr
entityType: IP
tactics:
- DefenseEvasion
queryPeriod: 1h
query: |
GCP_IAM
| where isempty(HttpUserAgentOriginal)
| extend AccountName = tostring(split(PayloadAuthenticationinfoPrincipalemail, "@")[0]), AccountUPNSuffix = tostring(split(PayloadAuthenticationinfoPrincipalemail, "@")[1])
kind: Scheduled
triggerThreshold: 0
id: 9e0d8632-d33d-4075-979e-c972674f77b3
{
"$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/9e0d8632-d33d-4075-979e-c972674f77b3')]",
"kind": "Scheduled",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/9e0d8632-d33d-4075-979e-c972674f77b3')]",
"properties": {
"alertRuleTemplateName": "9e0d8632-d33d-4075-979e-c972674f77b3",
"customDetails": null,
"description": "'Detects requests where user agent is empty.'\n",
"displayName": "GCP IAM - Empty user agent",
"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 Rules/GCPIAMEmptyUA.yaml",
"query": "GCP_IAM\n| where isempty(HttpUserAgentOriginal)\n| extend AccountName = tostring(split(PayloadAuthenticationinfoPrincipalemail, \"@\")[0]), AccountUPNSuffix = tostring(split(PayloadAuthenticationinfoPrincipalemail, \"@\")[1])\n",
"queryFrequency": "PT1H",
"queryPeriod": "PT1H",
"severity": "Medium",
"status": "Available",
"subTechniques": [],
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"DefenseEvasion"
],
"techniques": [
"T1550"
],
"templateVersion": "1.0.1",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0
},
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
}
]
}