Imperva - Malicious Client

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Id	2ff35ed4-b26a-4cad-93a6-f67adb00e919
Rulename	Imperva - Malicious Client
Description	Detects connections from known malicious clients.
Severity	High
Tactics	InitialAccess
Techniques	T1190 T1133
Required data connectors	ImpervaWAFCloudAPI
Kind	Scheduled
Query frequency	10m
Query period	10m
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/ImpervaCloudWAF/Analytic Rules/ImpervaMaliciousClient.yaml
Version	1.0.1
Arm template	2ff35ed4-b26a-4cad-93a6-f67adb00e919.json

KQL

ImpervaWAFCloud
| where ClientApp in~ ('VulnerabilityScanner', 'DDoSBot', 'ClickBot','CommentSpamBot','HackingTool', 'SpamBot', 'Worm')
| where DvcAction !startswith 'REQ_BLOCKED' or DvcAction !startswith 'REQ_BAD_'
| extend IPCustomEntity = SrcIpAddr, UrlCustomEntity = QueryString

YAML

name: Imperva - Malicious Client
query: |
  ImpervaWAFCloud
  | where ClientApp in~ ('VulnerabilityScanner', 'DDoSBot', 'ClickBot','CommentSpamBot','HackingTool', 'SpamBot', 'Worm')
  | where DvcAction !startswith 'REQ_BLOCKED' or DvcAction !startswith 'REQ_BAD_'
  | extend IPCustomEntity = SrcIpAddr, UrlCustomEntity = QueryString  
queryFrequency: 10m
triggerOperator: gt
requiredDataConnectors:
- dataTypes:
  - ImpervaWAFCloud
  connectorId: ImpervaWAFCloudAPI
status: Available
entityMappings:
- entityType: IP
  fieldMappings:
  - identifier: Address
    columnName: IPCustomEntity
- entityType: URL
  fieldMappings:
  - identifier: Url
    columnName: UrlCustomEntity
triggerThreshold: 0
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/ImpervaCloudWAF/Analytic Rules/ImpervaMaliciousClient.yaml
description: |
    'Detects connections from known malicious clients.'
version: 1.0.1
id: 2ff35ed4-b26a-4cad-93a6-f67adb00e919
kind: Scheduled
relevantTechniques:
- T1190
- T1133
severity: High
tactics:
- InitialAccess
queryPeriod: 10m

ARM