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

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

ARM