Excessive Blocked Traffic Events Generated by User

let threshold = 15;
let NoteableEvents = SymantecEndpointProtection
| where LogType == "Agent Traffic Logs"
| where Action =~ "Blocked"
| summarize TotalBlockedEvents = count() by UserName
| where TotalBlockedEvents > threshold;
SymantecEndpointProtection
| where LogType =~ "Agent Traffic Logs"
| where Action =~ "Blocked"
| join kind=inner (NoteableEvents) on UserName
| summarize StartTimeUtc = min(TimeGenerated), EndTimeUtc = max(TimeGenerated), Total = count() by UserName, RuleName, ServerName, LocalHostIpAddr, LocalPortNumber, TrafficDirection, RemoteHostIpAddr, RemotePortNumber, ApplicationName
| extend timestamp = StartTimeUtc, AccountCustomEntity = UserName, HostCustomEntity = ServerName, IPCustomEntity = LocalHostIpAddr

relevantTechniques:
- T1041
- T1132
- T1001
- T1021
name: Excessive Blocked Traffic Events Generated by User
requiredDataConnectors:
- dataTypes:
  - Syslog
  connectorId: SymantecEndpointProtection
- datatypes:
  - Syslog
  connectorId: SyslogAma
entityMappings:
- fieldMappings:
  - identifier: FullName
    columnName: AccountCustomEntity
  entityType: Account
- fieldMappings:
  - identifier: Address
    columnName: IPCustomEntity
  entityType: IP
- fieldMappings:
  - identifier: FullName
    columnName: HostCustomEntity
  entityType: Host
triggerThreshold: 0
id: fa0ab69c-7124-4f62-acdd-61017cf6ce89
tactics:
- Exfiltration
- CommandAndControl
- LateralMovement
version: 1.0.1
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Symantec Endpoint Protection/Analytic Rules/ExcessiveBlockedTrafficGeneratedbyUser.yaml
queryPeriod: 1h
kind: Scheduled
queryFrequency: 1h
severity: Medium
status: Available
description: |
    'Creates an incident when a Symantec Endpoint Proection agent detects excessive amounts of blocked traffic generated by a single user.'
query: |
  let threshold = 15;
  let NoteableEvents = SymantecEndpointProtection
  | where LogType == "Agent Traffic Logs"
  | where Action =~ "Blocked"
  | summarize TotalBlockedEvents = count() by UserName
  | where TotalBlockedEvents > threshold;
  SymantecEndpointProtection
  | where LogType =~ "Agent Traffic Logs"
  | where Action =~ "Blocked"
  | join kind=inner (NoteableEvents) on UserName
  | summarize StartTimeUtc = min(TimeGenerated), EndTimeUtc = max(TimeGenerated), Total = count() by UserName, RuleName, ServerName, LocalHostIpAddr, LocalPortNumber, TrafficDirection, RemoteHostIpAddr, RemotePortNumber, ApplicationName
  | extend timestamp = StartTimeUtc, AccountCustomEntity = UserName, HostCustomEntity = ServerName, IPCustomEntity = LocalHostIpAddr  
triggerOperator: gt

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "apiVersion": "2024-01-01-preview",
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/fa0ab69c-7124-4f62-acdd-61017cf6ce89')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/fa0ab69c-7124-4f62-acdd-61017cf6ce89')]",
      "properties": {
        "alertRuleTemplateName": "fa0ab69c-7124-4f62-acdd-61017cf6ce89",
        "customDetails": null,
        "description": "'Creates an incident when a Symantec Endpoint Proection agent detects excessive amounts of blocked traffic generated by a single user.'\n",
        "displayName": "Excessive Blocked Traffic Events Generated by User",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "AccountCustomEntity",
                "identifier": "FullName"
              }
            ]
          },
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "IPCustomEntity",
                "identifier": "Address"
              }
            ]
          },
          {
            "entityType": "Host",
            "fieldMappings": [
              {
                "columnName": "HostCustomEntity",
                "identifier": "FullName"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Symantec Endpoint Protection/Analytic Rules/ExcessiveBlockedTrafficGeneratedbyUser.yaml",
        "query": "let threshold = 15;\nlet NoteableEvents = SymantecEndpointProtection\n| where LogType == \"Agent Traffic Logs\"\n| where Action =~ \"Blocked\"\n| summarize TotalBlockedEvents = count() by UserName\n| where TotalBlockedEvents > threshold;\nSymantecEndpointProtection\n| where LogType =~ \"Agent Traffic Logs\"\n| where Action =~ \"Blocked\"\n| join kind=inner (NoteableEvents) on UserName\n| summarize StartTimeUtc = min(TimeGenerated), EndTimeUtc = max(TimeGenerated), Total = count() by UserName, RuleName, ServerName, LocalHostIpAddr, LocalPortNumber, TrafficDirection, RemoteHostIpAddr, RemotePortNumber, ApplicationName\n| extend timestamp = StartTimeUtc, AccountCustomEntity = UserName, HostCustomEntity = ServerName, IPCustomEntity = LocalHostIpAddr\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "PT1H",
        "severity": "Medium",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "CommandAndControl",
          "Exfiltration",
          "LateralMovement"
        ],
        "techniques": [
          "T1001",
          "T1021",
          "T1041",
          "T1132"
        ],
        "templateVersion": "1.0.1",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}