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

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

ARM