Detection rules › Kusto
Imperva - Forbidden HTTP request method in request
'Detects connections with unexpected HTTP request method.'
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Initial Access |
Rule body
id: 7ebc9e24-319c-4786-9151-c898240463bc
name: Imperva - Forbidden HTTP request method in request
description: |
'Detects connections with unexpected HTTP request method.'
severity: Medium
status: Available
requiredDataConnectors:
- connectorId: ImpervaWAFCloudAPI
dataTypes:
- ImpervaWAFCloud
queryFrequency: 1h
queryPeriod: 1h
triggerOperator: gt
triggerThreshold: 0
tactics:
- InitialAccess
relevantTechniques:
- T1190
- T1133
query: |
let bl_http_methods = dynamic(['PUT', 'HEAD', 'OPTIONS', 'TRACE', 'POST']);
ImpervaWAFCloud
| where HttpRequestMethod in~ (bl_http_methods)
| extend IPCustomEntity = SrcIpAddr, UrlCustomEntity = UrlOriginal
entityMappings:
- entityType: IP
fieldMappings:
- identifier: Address
columnName: IPCustomEntity
- entityType: URL
fieldMappings:
- identifier: Url
columnName: UrlCustomEntity
version: 1.0.0
kind: Scheduled
Stages and Predicates
Parameters
let bl_http_methods = dynamic(['PUT', 'HEAD', 'OPTIONS', 'TRACE', 'POST']);
Stage 1: source
ImpervaWAFCloud
Stage 2: where
| where HttpRequestMethod in~ (bl_http_methods)
Stage 3: extend
| extend IPCustomEntity = SrcIpAddr, UrlCustomEntity = UrlOriginal
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
HttpRequestMethod | in |
| field:"HttpRequestMethod" kind:in |
Output fields
These fields are emitted when the rule matches.
| Field | Source |
|---|---|
IPCustomEntity | extend |
UrlCustomEntity | extend |