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

relevantTechniques:
- T1566
name: Contrast Suspicious
triggerThreshold: 0
tactics:
- InitialAccess
- Exfiltration
severity: Medium
id: f713404e-805c-4e0c-91fa-2c149f76a07d
status: Available
requiredDataConnectors:
- dataTypes:
  - CommonSecurityLog
  connectorId: ContrastProtect
- dataTypes:
  - CommonSecurityLog
  connectorId: ContrastProtectAma
- dataTypes:
  - CommonSecurityLog
  connectorId: CefAma
entityMappings:
- entityType: IP
  fieldMappings:
  - columnName: SourceIP
    identifier: Address
- entityType: URL
  fieldMappings:
  - columnName: RequestURL
    identifier: Url
- entityType: CloudApplication
  fieldMappings:
  - columnName: ApplicationProtocol
    identifier: Name
- entityType: Malware
  fieldMappings:
  - columnName: Activity
    identifier: Name
  - columnName: Rule
    identifier: Category
kind: Scheduled
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')  
description: |
    'Creates Incidents for Suspicious events sourced from the Contrast Protect agent.'
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Contrast Protect/Analytic Rules/ContrastSuspicious.yaml
triggerOperator: gt
queryPeriod: 5m
queryFrequency: 5m
version: 1.0.2
customDetails:
  AgentVersion: DeviceVersion
  Agent: DeviceProduct
  Details: AdditionalExtensions
  Attack: Activity
  Application: ApplicationProtocol

ARM