Contrast Probes

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Id	297596de-d9ae-4fb8-b6ff-00fc01c9462d
Rulename	Contrast Probes
Description	Creates Incidents for Probed events sourced from the Contrast Protect agent.
Severity	Informational
Tactics	InitialAccess Exfiltration
Techniques	T1566
Required data connectors	CefAma ContrastProtect ContrastProtectAma
Kind	Scheduled
Query frequency	5m
Query period	5m
Trigger threshold	10
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Contrast Protect/Analytic Rules/ContrastProbes.yaml
Version	1.0.2
Arm template	297596de-d9ae-4fb8-b6ff-00fc01c9462d.json

KQL

let extract_data=(a:string, k:string) {
  parse_urlquery(replace(@';', @'&', a))["Query Parameters"][k]
};

CommonSecurityLog 
| where DeviceVendor == "Contrast Security"
| where AdditionalExtensions contains "PROBED" or AdditionalExtensions contains "INEFFECTIVE"
| extend DeviceProduct
| extend SourceIP
| extend DeviceVersion
| extend Activity
| extend ApplicationProtocol
| extend RequestURL
| extend RequestMethod
| extend Rule = extract_data(AdditionalExtensions, 'pri')

YAML

name: Contrast Probes
query: |
  let extract_data=(a:string, k:string) {
    parse_urlquery(replace(@';', @'&', a))["Query Parameters"][k]
  };

  CommonSecurityLog 
  | where DeviceVendor == "Contrast Security"
  | where AdditionalExtensions contains "PROBED" or AdditionalExtensions contains "INEFFECTIVE"
  | extend DeviceProduct
  | extend SourceIP
  | extend DeviceVersion
  | extend Activity
  | extend ApplicationProtocol
  | extend RequestURL
  | extend RequestMethod
  | extend Rule = extract_data(AdditionalExtensions, 'pri')  
queryFrequency: 5m
triggerOperator: gt
requiredDataConnectors:
- dataTypes:
  - CommonSecurityLog
  connectorId: ContrastProtect
- dataTypes:
  - CommonSecurityLog
  connectorId: ContrastProtectAma
- dataTypes:
  - CommonSecurityLog
  connectorId: CefAma
status: Available
entityMappings:
- entityType: IP
  fieldMappings:
  - identifier: Address
    columnName: SourceIP
- entityType: URL
  fieldMappings:
  - identifier: Url
    columnName: RequestURL
- entityType: CloudApplication
  fieldMappings:
  - identifier: Name
    columnName: ApplicationProtocol
- entityType: Malware
  fieldMappings:
  - identifier: Name
    columnName: Activity
  - identifier: Category
    columnName: Rule
triggerThreshold: 10
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Contrast Protect/Analytic Rules/ContrastProbes.yaml
description: |
    'Creates Incidents for Probed events sourced from the Contrast Protect agent.'
version: 1.0.2
id: 297596de-d9ae-4fb8-b6ff-00fc01c9462d
kind: Scheduled
customDetails:
  Application: ApplicationProtocol
  Agent: DeviceProduct
  Details: AdditionalExtensions
  AgentVersion: DeviceVersion
  Attack: Activity
relevantTechniques:
- T1566
severity: Informational
tactics:
- InitialAccess
- Exfiltration
queryPeriod: 5m

ARM