GCP IAM - Empty user agent

Back


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

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

ARM