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
id: 0f788a93-dc88-4f80-89ef-bef7cd0fef05
tactics:
- CommandAndControl
queryPeriod: 15m
triggerThreshold: 0
name: Cisco SE - Connection to known C2 server
query: |
  CiscoSecureEndpoint
  | where EventMessage has 'Suspected botnet connection'
  | extend HostCustomEntity = DstHostname, MalwareCustomEntity = ThreatName  
severity: High
triggerOperator: gt
kind: Scheduled
relevantTechniques:
- T1071
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cisco Secure Endpoint/Analytic Rules/CiscoSEC2Connection.yaml
queryFrequency: 15m
requiredDataConnectors:
- connectorId: CiscoSecureEndpoint
  dataTypes:
  - CiscoSecureEndpoint
description: |
    'This rule is triggered when connection to known C2 is detected from host.'
status: Available
version: 1.0.0
entityMappings:
- fieldMappings:
  - columnName: HostCustomEntity
    identifier: HostName
  entityType: Host
- fieldMappings:
  - columnName: MalwareCustomEntity
    identifier: Name
  entityType: Malware
{
  "$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"
    }
  ]
}