GWorkspace - Multiple user agents for single source

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Id	6ff0e16e-5999-11ec-bf63-0242ac130002
Rulename	GWorkspace - Multiple user agents for single source
Description	Detects requests with different user agents from one source in short timeframe.
Severity	Medium
Tactics	Persistence Collection
Techniques	T1185 T1176
Required data connectors	GoogleWorkspaceReportsAPI
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/GoogleWorkspaceReports/Analytic Rules/GWorkspaceDifferentUAsFromSingleIP.yaml
Version	1.0.1
Arm template	6ff0e16e-5999-11ec-bf63-0242ac130002.json

KQL

let threshold = 5;
GWorkspaceActivityReports
| where isnotempty(UserAgentOriginal)
| summarize user_ua = makeset(UserAgentOriginal) by SrcIpAddr, bin(TimeGenerated, 5m)
| where array_length(user_ua) > threshold
| extend IPCustomEntity = SrcIpAddr

YAML

relevantTechniques:
- T1185
- T1176
entityMappings:
- fieldMappings:
  - columnName: IPCustomEntity
    identifier: Address
  entityType: IP
triggerThreshold: 0
description: |
    'Detects requests with different user agents from one source in short timeframe.'
requiredDataConnectors:
- connectorId: GoogleWorkspaceReportsAPI
  dataTypes:
  - GWorkspaceActivityReports
triggerOperator: gt
version: 1.0.1
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/GoogleWorkspaceReports/Analytic Rules/GWorkspaceDifferentUAsFromSingleIP.yaml
id: 6ff0e16e-5999-11ec-bf63-0242ac130002
queryFrequency: 1h
query: |
  let threshold = 5;
  GWorkspaceActivityReports
  | where isnotempty(UserAgentOriginal)
  | summarize user_ua = makeset(UserAgentOriginal) by SrcIpAddr, bin(TimeGenerated, 5m)
  | where array_length(user_ua) > threshold
  | extend IPCustomEntity = SrcIpAddr  
severity: Medium
status: Available
queryPeriod: 1h
name: GWorkspace - Multiple user agents for single source
tactics:
- Persistence
- Collection
kind: Scheduled

ARM