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Oracle - Oracle WebLogic Exploit CVE-2021-2109

Status
available
Severity
high
Time window
10m
Source
github.com/Azure/Azure-Sentinel

'Detects exploitation of Oracle WebLogic vulnerability CVE-2021-2109'

MITRE ATT&CK coverage

TacticTechniques
Initial Access

Rule body

id: 67950168-5740-11ec-bf63-0242ac130002
name: Oracle - Oracle WebLogic Exploit CVE-2021-2109 
description: |
  'Detects exploitation of Oracle WebLogic vulnerability CVE-2021-2109'
severity: High
status: Available
requiredDataConnectors:
  - connectorId: CustomLogsAma
    dataTypes:
      - OracleWebLogicServer_CL
queryFrequency: 10m
queryPeriod: 10m
triggerOperator: gt
triggerThreshold: 0
tactics:
  - InitialAccess
relevantTechniques:
  - T1190
query: |
  OracleWebLogicServerEvent
  | where HttpRequestMethod =~ "GET"
  | where UrlOriginal has_all ("ldap://", "com.bea.console.handles.JndiBindingHandle", "AdminServer")
  | extend UrlCustomEntity = UrlOriginal
entityMappings:
  - entityType: URL
    fieldMappings:
      - identifier: Url
        columnName: UrlCustomEntity
version: 1.0.3
kind: Scheduled

Stages and Predicates

Stage 1: source

OracleWebLogicServerEvent

Stage 2: where

| where HttpRequestMethod =~ "GET"

Stage 3: where

| where UrlOriginal has_all ("ldap://", "com.bea.console.handles.JndiBindingHandle", "AdminServer")

Stage 4: extend

| extend UrlCustomEntity = UrlOriginal

Indicators

These rows show field, operator, and value matches.

FieldKindValuesSearch
HttpRequestMethodeq
  • GET
field:"HttpRequestMethod" kind:eq value:"GET"
UrlOriginalmatch
  • AdminServer transforms: term
  • com.bea.console.handles.JndiBindingHandle transforms: term
  • ldap:// transforms: term
field:"UrlOriginal" kind:match

Output fields

These fields are emitted when the rule matches.

FieldSource
UrlCustomEntityextend