GCP IAM - Empty user agent

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Id	9e0d8632-d33d-4075-979e-c972674f77b3
Rulename	GCP IAM - Empty user agent
Description	Detects requests where user agent is empty.
Severity	Medium
Tactics	DefenseEvasion
Techniques	T1550
Required data connectors	GCPIAMDataConnector
Kind	Scheduled
Query frequency	1h
Query period	1h
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/GoogleCloudPlatformIAM/Analytic Rules/GCPIAMEmptyUA.yaml
Version	1.0.1
Arm template	9e0d8632-d33d-4075-979e-c972674f77b3.json

KQL

GCP_IAM
| where isempty(HttpUserAgentOriginal)
| extend AccountName = tostring(split(PayloadAuthenticationinfoPrincipalemail, "@")[0]), AccountUPNSuffix = tostring(split(PayloadAuthenticationinfoPrincipalemail, "@")[1])

YAML

status: Available
queryFrequency: 1h
queryPeriod: 1h
triggerOperator: gt
query: |
  GCP_IAM
  | where isempty(HttpUserAgentOriginal)
  | extend AccountName = tostring(split(PayloadAuthenticationinfoPrincipalemail, "@")[0]), AccountUPNSuffix = tostring(split(PayloadAuthenticationinfoPrincipalemail, "@")[1])  
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/GoogleCloudPlatformIAM/Analytic Rules/GCPIAMEmptyUA.yaml
tactics:
- DefenseEvasion
triggerThreshold: 0
entityMappings:
- entityType: Account
  fieldMappings:
  - identifier: FullName
    columnName: PayloadAuthenticationinfoPrincipalemail
  - identifier: Name
    columnName: AccountName
  - identifier: UPNSuffix
    columnName: AccountUPNSuffix
- entityType: IP
  fieldMappings:
  - identifier: Address
    columnName: SrcIpAddr
requiredDataConnectors:
- connectorId: GCPIAMDataConnector
  dataTypes:
  - GCP_IAM
kind: Scheduled
relevantTechniques:
- T1550
description: |
    'Detects requests where user agent is empty.'
name: GCP IAM - Empty user agent
version: 1.0.1
id: 9e0d8632-d33d-4075-979e-c972674f77b3
severity: Medium

ARM