Contrast Suspicious

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Id	f713404e-805c-4e0c-91fa-2c149f76a07d
Rulename	Contrast Suspicious
Description	Creates Incidents for Suspicious events sourced from the Contrast Protect agent.
Severity	Medium
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/ContrastSuspicious.yaml
Version	1.0.2
Arm template	f713404e-805c-4e0c-91fa-2c149f76a07d.json

KQL

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

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

YAML

name: Contrast Suspicious
id: f713404e-805c-4e0c-91fa-2c149f76a07d
description: |
    'Creates Incidents for Suspicious events sourced from the Contrast Protect agent.'
triggerThreshold: 0
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
version: 1.0.2
triggerOperator: gt
query: |
  let extract_data=(a:string, k:string) {
    parse_urlquery(replace(@';', @'&', a))["Query Parameters"][k]
  };

  CommonSecurityLog 
  | where DeviceVendor == "Contrast Security"
  | where AdditionalExtensions contains "SUSPICIOUS"
  | extend DeviceProduct
  | extend SourceIP
  | extend DeviceVersion
  | extend Activity
  | extend ApplicationProtocol
  | extend RequestURL
  | extend RequestMethod
  | extend Rule = extract_data(AdditionalExtensions, 'pri')  
tactics:
- InitialAccess
- Exfiltration
kind: Scheduled
queryFrequency: 5m
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Contrast Protect/Analytic Rules/ContrastSuspicious.yaml
severity: Medium
queryPeriod: 5m
requiredDataConnectors:
- dataTypes:
  - CommonSecurityLog
  connectorId: ContrastProtect
- dataTypes:
  - CommonSecurityLog
  connectorId: ContrastProtectAma
- dataTypes:
  - CommonSecurityLog
  connectorId: CefAma
status: Available
customDetails:
  Agent: DeviceProduct
  AgentVersion: DeviceVersion
  Attack: Activity
  Application: ApplicationProtocol
  Details: AdditionalExtensions
relevantTechniques:
- T1566

ARM