Contrast Blocks

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Id	4396f8c3-d114-4154-9f4c-048ba522ed04
Rulename	Contrast Blocks
Description	Creates Incidents for Blocked events sourced from the Contrast Protect agent.
Severity	Low
Tactics	InitialAccess Exfiltration
Techniques	T1566
Required data connectors	CefAma ContrastProtect ContrastProtectAma
Kind	Scheduled
Query frequency	5m
Query period	5m
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Contrast Protect/Analytic Rules/ContrastBlocks.yaml
Version	1.0.2
Arm template	4396f8c3-d114-4154-9f4c-048ba522ed04.json

KQL

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

CommonSecurityLog 
| where DeviceVendor == "Contrast Security"
| where AdditionalExtensions contains "BLOCKED"
| 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 Blocked events sourced from the Contrast Protect agent.'
version: 1.0.2
triggerThreshold: 0
tactics:
- InitialAccess
- Exfiltration
queryPeriod: 5m
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Contrast Protect/Analytic Rules/ContrastBlocks.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: 4396f8c3-d114-4154-9f4c-048ba522ed04
name: Contrast Blocks
queryFrequency: 5m
severity: Low
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 "BLOCKED"
  | 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