detection.wiki

Detection rules › Kusto

Imperva - Request from unexpected countries

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

'Detects request attempts from unexpected countries.'

MITRE ATT&CK coverage

TacticTechniques
Initial Access

Rule body

id: 58300723-22e0-4096-b33a-aa9b992c3564
name: Imperva - Request from unexpected countries
description: |
  'Detects request attempts from unexpected countries.'
severity: High
status: Available
requiredDataConnectors:
  - connectorId: ImpervaWAFCloudAPI
    dataTypes:
      - ImpervaWAFCloud
queryFrequency: 1h
queryPeriod: 1h
triggerOperator: gt
triggerThreshold: 0
tactics:
  - InitialAccess
relevantTechniques:
  - T1190
  - T1133
query: |
  let bl_country = dynamic(['CH', 'KR']);
  ImpervaWAFCloud
  | where Country in (bl_country)
  | where DvcAction !startswith 'REQ_BLOCKED' or DvcAction !startswith 'REQ_BAD_'
  | extend IPCustomEntity = SrcIpAddr
entityMappings:
  - entityType: IP
    fieldMappings:
      - identifier: Address
        columnName: IPCustomEntity
version: 1.0.0
kind: Scheduled

Stages and Predicates

Parameters

let bl_country = dynamic(['CH', 'KR']);

Stage 1: source

ImpervaWAFCloud

Stage 2: where

| where Country in (bl_country)

Stage 3: where

| where DvcAction !startswith 'REQ_BLOCKED' or DvcAction !startswith 'REQ_BAD_'

Stage 4: extend

| extend IPCustomEntity = SrcIpAddr

Indicators

These rows show field, operator, and value matches.

FieldKindValuesSearch
Countryin
  • CH
  • KR
field:"Country" kind:in

Output fields

These fields are emitted when the rule matches.

FieldSource
IPCustomEntityextend