ApexOne - Attack Discovery Detection

Status: available
Severity: high
Time window: 1h
Source: github.com/Azure/Azure-Sentinel

'Detects Attack Discovery Detection events.'

MITRE ATT&CK coverage

Tactic	Techniques
Initial Access	`T1190` Exploit Public-Facing Application

Rule body

id: 7a3193b8-67b7-11ec-90d6-0242ac120003
name: ApexOne - Attack Discovery Detection
description: |
  'Detects Attack Discovery Detection events.'
severity: High
status: Available
requiredDataConnectors:
  - connectorId: CefAma
    dataTypes:
      - CommonSecurityLog
queryFrequency: 1h
queryPeriod: 1h
triggerOperator: gt
triggerThreshold: 0
tactics:
  - InitialAccess
relevantTechniques:
  - T1190
query: |
  TMApexOneEvent
  | where EventMessage has "Attack Discovery Detection"
  | extend IPCustomEntity = SrcIpAddr, AccountCustomEntity = DstUserName
entityMappings:
  - entityType: IP
    fieldMappings:
      - identifier: Address
        columnName: IPCustomEntity
  - entityType: Account
    fieldMappings:
      - identifier: Name
        columnName: AccountCustomEntity
version: 1.0.3
kind: Scheduled

Stages and Predicates

Stage 1: `source`

TMApexOneEvent

Stage 2: `where`

| where EventMessage has "Attack Discovery Detection"

Stage 3: `extend`

| extend IPCustomEntity = SrcIpAddr, AccountCustomEntity = DstUserName

Indicators

These rows show field, operator, and value matches.

Field	Kind	Values	Search
`EventMessage`	match	`Attack Discovery Detection` transforms: `term`	`field:"EventMessage" kind:match value:"Attack Discovery Detection"`

Output fields

These fields are emitted when the rule matches.

Field	Source
`AccountCustomEntity`	`extend`
`IPCustomEntity`	`extend`

ApexOne - Attack Discovery Detection

MITRE ATT&CK coverage

Rule body

Stages and Predicates

Stage 1: source

Stage 2: where

Stage 3: extend

Indicators

Output fields

Stage 1: `source`

Stage 2: `where`

Stage 3: `extend`