Oracle - Multiple user agents for single source

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Id	44c7d12a-573f-11ec-bf63-0242ac130002
Rulename	Oracle - Multiple user agents for single source
Description	Detects requests with different user agents from one source in short timeframe.
Severity	Medium
Tactics	InitialAccess
Techniques	T1190 T1133
Required data connectors	CustomLogsAma
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/OracleWebLogicServer/Analytic Rules/OracleWebLogicDifferentUAsFromSingleIP.yaml
Version	1.0.3
Arm template	44c7d12a-573f-11ec-bf63-0242ac130002.json

KQL

let threshold = 5;
OracleWebLogicServerEvent
| where isnotempty(HttpUserAgentOriginal)
| summarize ua_count=makeset(HttpUserAgentOriginal) by SrcIpAddr, bin(TimeGenerated, 5m)
| where array_length(ua_count) > threshold
| extend IPCustomEntity = SrcIpAddr

YAML

status: Available
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/OracleWebLogicServer/Analytic Rules/OracleWebLogicDifferentUAsFromSingleIP.yaml
query: |
  let threshold = 5;
  OracleWebLogicServerEvent
  | where isnotempty(HttpUserAgentOriginal)
  | summarize ua_count=makeset(HttpUserAgentOriginal) by SrcIpAddr, bin(TimeGenerated, 5m)
  | where array_length(ua_count) > threshold
  | extend IPCustomEntity = SrcIpAddr  
requiredDataConnectors:
- dataTypes:
  - OracleWebLogicServer_CL
  connectorId: CustomLogsAma
tactics:
- InitialAccess
name: Oracle - Multiple user agents for single source
relevantTechniques:
- T1190
- T1133
severity: Medium
entityMappings:
- fieldMappings:
  - identifier: Address
    columnName: IPCustomEntity
  entityType: IP
kind: Scheduled
queryFrequency: 1h
description: |
    'Detects requests with different user agents from one source in short timeframe.'
triggerThreshold: 0
triggerOperator: gt
version: 1.0.3
queryPeriod: 1h
id: 44c7d12a-573f-11ec-bf63-0242ac130002

ARM