Microsoft Sentinel Analytic Rules
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Cisco SE - Connection to known C2 server

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Id0f788a93-dc88-4f80-89ef-bef7cd0fef05
RulenameCisco SE - Connection to known C2 server
DescriptionThis rule is triggered when connection to known C2 is detected from host.
SeverityHigh
TacticsCommandAndControl
TechniquesT1071
Required data connectorsCiscoSecureEndpoint
KindScheduled
Query frequency15m
Query period15m
Trigger threshold0
Trigger operatorgt
Source Urihttps://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cisco Secure Endpoint/Analytic Rules/CiscoSEC2Connection.yaml
Version1.0.0
Arm template0f788a93-dc88-4f80-89ef-bef7cd0fef05.json
Deploy To Azure
CiscoSecureEndpoint
| where EventMessage has 'Suspected botnet connection'
| extend HostCustomEntity = DstHostname, MalwareCustomEntity = ThreatName
requiredDataConnectors:
- dataTypes:
  - CiscoSecureEndpoint
  connectorId: CiscoSecureEndpoint
triggerThreshold: 0
relevantTechniques:
- T1071
queryPeriod: 15m
version: 1.0.0
id: 0f788a93-dc88-4f80-89ef-bef7cd0fef05
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cisco Secure Endpoint/Analytic Rules/CiscoSEC2Connection.yaml
query: |
  CiscoSecureEndpoint
  | where EventMessage has 'Suspected botnet connection'
  | extend HostCustomEntity = DstHostname, MalwareCustomEntity = ThreatName  
status: Available
entityMappings:
- fieldMappings:
  - identifier: HostName
    columnName: HostCustomEntity
  entityType: Host
- fieldMappings:
  - identifier: Name
    columnName: MalwareCustomEntity
  entityType: Malware
tactics:
- CommandAndControl
severity: High
name: Cisco SE - Connection to known C2 server
queryFrequency: 15m
triggerOperator: gt
kind: Scheduled
description: |
    'This rule is triggered when connection to known C2 is detected from host.'
{
  "$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/0f788a93-dc88-4f80-89ef-bef7cd0fef05')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/0f788a93-dc88-4f80-89ef-bef7cd0fef05')]",
      "properties": {
        "alertRuleTemplateName": "0f788a93-dc88-4f80-89ef-bef7cd0fef05",
        "customDetails": null,
        "description": "'This rule is triggered when connection to known C2 is detected from host.'\n",
        "displayName": "Cisco SE - Connection to known C2 server",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Host",
            "fieldMappings": [
              {
                "columnName": "HostCustomEntity",
                "identifier": "HostName"
              }
            ]
          },
          {
            "entityType": "Malware",
            "fieldMappings": [
              {
                "columnName": "MalwareCustomEntity",
                "identifier": "Name"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cisco Secure Endpoint/Analytic Rules/CiscoSEC2Connection.yaml",
        "query": "CiscoSecureEndpoint\n| where EventMessage has 'Suspected botnet connection'\n| extend HostCustomEntity = DstHostname, MalwareCustomEntity = ThreatName\n",
        "queryFrequency": "PT15M",
        "queryPeriod": "PT15M",
        "severity": "High",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "CommandAndControl"
        ],
        "techniques": [
          "T1071"
        ],
        "templateVersion": "1.0.0",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}