Corelight - Multiple files sent over HTTP with abnormal requests

let threshold = 25;
let fl_size_threshold = 10000000;
Corelight
| where EventType =~ 'http'
| where HttpRequestMethod in~ ('POST', 'PUT')
| where isempty(HttpReferrerOriginal)
| where tolong(HttpRequestBodyBytes) > fl_size_threshold
| summarize count() by UrlOriginal, SrcIpAddr, bin(TimeGenerated, 15m)
| where count_ > threshold
| extend IPCustomEntity = SrcIpAddr

version: 1.0.0
name: Corelight - Multiple files sent over HTTP with abnormal requests
severity: Medium
queryFrequency: 1h
kind: Scheduled
queryPeriod: 1h
description: |
    'Detects sources sending multiple compressed files greater than 10MBs sent over HTTP in a short amount of time.'
query: |
  let threshold = 25;
  let fl_size_threshold = 10000000;
  Corelight
  | where EventType =~ 'http'
  | where HttpRequestMethod in~ ('POST', 'PUT')
  | where isempty(HttpReferrerOriginal)
  | where tolong(HttpRequestBodyBytes) > fl_size_threshold
  | summarize count() by UrlOriginal, SrcIpAddr, bin(TimeGenerated, 15m)
  | where count_ > threshold
  | extend IPCustomEntity = SrcIpAddr  
tactics:
- Exfiltration
triggerOperator: gt
entityMappings:
- entityType: IP
  fieldMappings:
  - columnName: IPCustomEntity
    identifier: Address
triggerThreshold: 0
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Corelight/Analytic Rules/CorelightMultipleFilesSentOverHTTPAbnormalRequests.yaml
requiredDataConnectors:
- connectorId: Corelight
  dataTypes:
  - Corelight
status: Available
relevantTechniques:
- T1030
id: 7226d37b-50ee-4e3b-9f80-5b74080d8f2c

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/7226d37b-50ee-4e3b-9f80-5b74080d8f2c')]",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/7226d37b-50ee-4e3b-9f80-5b74080d8f2c')]",
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules",
      "kind": "Scheduled",
      "apiVersion": "2022-11-01-preview",
      "properties": {
        "displayName": "Corelight - Multiple files sent over HTTP with abnormal requests",
        "description": "'Detects sources sending multiple compressed files greater than 10MBs sent over HTTP in a short amount of time.'\n",
        "severity": "Medium",
        "enabled": true,
        "query": "let threshold = 25;\nlet fl_size_threshold = 10000000;\nCorelight\n| where EventType =~ 'http'\n| where HttpRequestMethod in~ ('POST', 'PUT')\n| where isempty(HttpReferrerOriginal)\n| where tolong(HttpRequestBodyBytes) > fl_size_threshold\n| summarize count() by UrlOriginal, SrcIpAddr, bin(TimeGenerated, 15m)\n| where count_ > threshold\n| extend IPCustomEntity = SrcIpAddr\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "PT1H",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0,
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Exfiltration"
        ],
        "techniques": [
          "T1030"
        ],
        "alertRuleTemplateName": "7226d37b-50ee-4e3b-9f80-5b74080d8f2c",
        "customDetails": null,
        "entityMappings": [
          {
            "fieldMappings": [
              {
                "columnName": "IPCustomEntity",
                "identifier": "Address"
              }
            ],
            "entityType": "IP"
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Corelight/Analytic Rules/CorelightMultipleFilesSentOverHTTPAbnormalRequests.yaml",
        "templateVersion": "1.0.0",
        "status": "Available"
      }
    }
  ]
}