Fortiweb - WAF Allowed threat

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

'Detects WAF "Allowed" action on threat events.'

MITRE ATT&CK coverage

Tactic	Techniques
Initial Access	`T1133` External Remote Services `T1190` Exploit Public-Facing Application

Rule body

id: 86e9409f-b9ea-4e9a-8b72-5132ba43bcae
name: Fortiweb - WAF Allowed threat
description: |
  'Detects WAF "Allowed" action on threat events.'
severity: High
status: Available
requiredDataConnectors:
  - connectorId: FortinetFortiWebAma
    dataTypes:
      - Fortiweb
queryFrequency: 1h
queryPeriod: 1h
triggerOperator: gt
triggerThreshold: 0
tactics:
  - InitialAccess
relevantTechniques:
  - T1190
  - T1133
query: |
  Fortiweb
  | where EventType =~ 'Attack'
  | where DvcAction =~ 'Allow'
  | summarize count() by SrcIpAddr
entityMappings:
  - entityType: IP
    fieldMappings:
      - identifier: Address
        columnName: SrcIpAddr
version: 1.0.2
kind: Scheduled

Stages and Predicates

Stage 1: `source`

Fortiweb

Stage 2: `where`

| where EventType =~ 'Attack'

Stage 3: `where`

| where DvcAction =~ 'Allow'

Stage 4: `summarize`

| summarize count() by SrcIpAddr

Indicators

These rows show field, operator, and value matches.

Field	Kind	Values	Search
`DvcAction`	eq	`Allow`	`field:"DvcAction" kind:eq value:"Allow"`
`EventType`	eq	`Attack`	`field:"EventType" kind:eq value:"Attack"`

Output fields

These fields are emitted when the rule matches.

Field	Source
`SrcIpAddr`	`summarize`

Fortiweb - WAF Allowed threat

MITRE ATT&CK coverage

Rule body

Stages and Predicates

Stage 1: source

Stage 2: where

Stage 3: where

Stage 4: summarize

Indicators

Output fields

Stage 1: `source`

Stage 2: `where`

Stage 3: `where`

Stage 4: `summarize`