Imperva - Request from unexpected IP address to admin panel

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

'Detects requests from unexpected IP addresses to admin panel.'

MITRE ATT&CK coverage

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

Rule body

id: 427c025d-c068-4844-8205-66879e89bcfa
name: Imperva - Request from unexpected IP address to admin panel
description: |
  'Detects requests from unexpected IP addresses to admin panel.'
severity: High
status: Available
requiredDataConnectors:
  - connectorId: ImpervaWAFCloudAPI
    dataTypes:
      - ImpervaWAFCloud
queryFrequency: 10m
queryPeriod: 10m
triggerOperator: gt
triggerThreshold: 0
tactics:
  - InitialAccess
relevantTechniques:
  - T1190
  - T1133
query: |
  ImpervaWAFCloud
  | where QueryString contains @'/admin'
  | where ipv4_is_private(SrcIpAddr) == False
  | extend IPCustomEntity = SrcIpAddr
entityMappings:
  - entityType: IP
    fieldMappings:
      - identifier: Address
        columnName: IPCustomEntity
version: 1.0.1
kind: Scheduled

Stages and Predicates

Stage 1: `source`

ImpervaWAFCloud

Stage 2: `where`

| where QueryString contains @'/admin'

Stage 3: `where`

| where ipv4_is_private(SrcIpAddr) == False

Stage 4: `extend`

| extend IPCustomEntity = SrcIpAddr

Exclusions

The rule actively suppresses these predicates.

Field	Kind	Excluded values	Search
`SrcIpAddr`	cidr_match	`10.0.0.0/8`, `172.16.0.0/12`, `192.168.0.0/16`, `169.254.0.0/16`, `127.0.0.0/8`	`excludes:SrcIpAddr`

Indicators

These rows show field, operator, and value matches.

Field	Kind	Values	Search
`QueryString`	contains	`/admin`	`field:"QueryString" kind:contains value:"/admin"`

Output fields

These fields are emitted when the rule matches.

Field	Source
`IPCustomEntity`	`extend`