Cisco SE - Multiple malware on host

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Id	b13489d7-feb1-4ad3-9a4c-09f6d64448fd
Rulename	Cisco SE - Multiple malware on host
Description	This rule triggers when multiple malware where detected on host.
Severity	High
Tactics	InitialAccess
Techniques	T1190 T1133
Required data connectors	CiscoSecureEndpoint
Kind	Scheduled
Query frequency	1h
Query period	1h
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cisco Secure Endpoint/Analytic Rules/CiscoSEMultipleMalwareOnHost.yaml
Version	1.0.0
Arm template	b13489d7-feb1-4ad3-9a4c-09f6d64448fd.json

KQL

let threshold = 2;
CiscoSecureEndpoint
| where isnotempty(ThreatName)
| summarize infected = makeset(ThreatName) by DstHostname, bin(TimeGenerated, 10m)
| where array_length(infected) >= threshold
| extend HostCustomEntity = DstHostname

YAML

kind: Scheduled
entityMappings:
- entityType: Host
  fieldMappings:
  - columnName: HostCustomEntity
    identifier: HostName
description: |
    'This rule triggers when multiple malware where detected on host.'
severity: High
queryFrequency: 1h
triggerThreshold: 0
relevantTechniques:
- T1190
- T1133
status: Available
tactics:
- InitialAccess
name: Cisco SE - Multiple malware on host
id: b13489d7-feb1-4ad3-9a4c-09f6d64448fd
query: |
  let threshold = 2;
  CiscoSecureEndpoint
  | where isnotempty(ThreatName)
  | summarize infected = makeset(ThreatName) by DstHostname, bin(TimeGenerated, 10m)
  | where array_length(infected) >= threshold
  | extend HostCustomEntity = DstHostname  
requiredDataConnectors:
- dataTypes:
  - CiscoSecureEndpoint
  connectorId: CiscoSecureEndpoint
version: 1.0.0
triggerOperator: gt
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cisco Secure Endpoint/Analytic Rules/CiscoSEMultipleMalwareOnHost.yaml
queryPeriod: 1h

ARM

{
  "$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/b13489d7-feb1-4ad3-9a4c-09f6d64448fd')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/b13489d7-feb1-4ad3-9a4c-09f6d64448fd')]",
      "properties": {
        "alertRuleTemplateName": "b13489d7-feb1-4ad3-9a4c-09f6d64448fd",
        "customDetails": null,
        "description": "'This rule triggers when multiple malware where detected on host.'\n",
        "displayName": "Cisco SE - Multiple malware on host",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Host",
            "fieldMappings": [
              {
                "columnName": "HostCustomEntity",
                "identifier": "HostName"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cisco Secure Endpoint/Analytic Rules/CiscoSEMultipleMalwareOnHost.yaml",
        "query": "let threshold = 2;\nCiscoSecureEndpoint\n| where isnotempty(ThreatName)\n| summarize infected = makeset(ThreatName) by DstHostname, bin(TimeGenerated, 10m)\n| where array_length(infected) >= threshold\n| extend HostCustomEntity = DstHostname\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "PT1H",
        "severity": "High",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "InitialAccess"
        ],
        "techniques": [
          "T1133",
          "T1190"
        ],
        "templateVersion": "1.0.0",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}