Cisco SE - Malware outbreak

Back


Id	225053c7-085b-4fca-a18f-c367f9228bf3
Rulename	Cisco SE - Malware outbreak
Description	Detects possible malware outbreak.
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/CiscoSEMalwareOutbreak.yaml
Version	1.0.0
Arm template	225053c7-085b-4fca-a18f-c367f9228bf3.json

KQL

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

YAML

relevantTechniques:
- T1190
- T1133
name: Cisco SE - Malware outbreak
requiredDataConnectors:
- dataTypes:
  - CiscoSecureEndpoint
  connectorId: CiscoSecureEndpoint
entityMappings:
- fieldMappings:
  - identifier: Name
    columnName: MalwareCustomEntity
  entityType: Malware
triggerThreshold: 0
id: 225053c7-085b-4fca-a18f-c367f9228bf3
tactics:
- InitialAccess
version: 1.0.0
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cisco Secure Endpoint/Analytic Rules/CiscoSEMalwareOutbreak.yaml
queryPeriod: 1h
kind: Scheduled
queryFrequency: 1h
severity: High
status: Available
description: |
    'Detects possible malware outbreak.'
query: |
  let threshold = 2;
  CiscoSecureEndpoint
  | where isnotempty(ThreatName)
  | summarize infected = makeset(DstHostname) by ThreatName, bin(TimeGenerated, 10m)
  | where array_length(infected) >= threshold
  | extend MalwareCustomEntity = ThreatName  
triggerOperator: gt

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/225053c7-085b-4fca-a18f-c367f9228bf3')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/225053c7-085b-4fca-a18f-c367f9228bf3')]",
      "properties": {
        "alertRuleTemplateName": "225053c7-085b-4fca-a18f-c367f9228bf3",
        "customDetails": null,
        "description": "'Detects possible malware outbreak.'\n",
        "displayName": "Cisco SE - Malware outbreak",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Malware",
            "fieldMappings": [
              {
                "columnName": "MalwareCustomEntity",
                "identifier": "Name"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cisco Secure Endpoint/Analytic Rules/CiscoSEMalwareOutbreak.yaml",
        "query": "let threshold = 2;\nCiscoSecureEndpoint\n| where isnotempty(ThreatName)\n| summarize infected = makeset(DstHostname) by ThreatName, bin(TimeGenerated, 10m)\n| where array_length(infected) >= threshold\n| extend MalwareCustomEntity = ThreatName\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"
    }
  ]
}