Contrast Suspicious

Back


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
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')  
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: 0
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Contrast Protect/Analytic Rules/ContrastSuspicious.yaml
description: |
    'Creates Incidents for Suspicious events sourced from the Contrast Protect agent.'
version: 1.0.2
id: f713404e-805c-4e0c-91fa-2c149f76a07d
kind: Scheduled
customDetails:
  Application: ApplicationProtocol
  Agent: DeviceProduct
  Details: AdditionalExtensions
  AgentVersion: DeviceVersion
  Attack: Activity
relevantTechniques:
- T1566
severity: Medium
tactics:
- InitialAccess
- Exfiltration
queryPeriod: 5m

ARM