Cisco SE - Ransomware Activity

CiscoSecureEndpoint
| where EventMessage has 'Suspected ransomware'
| extend HostCustomEntity = DstHostname, MalwareCustomEntity = ThreatName

name: Cisco SE - Ransomware Activity
triggerOperator: gt
query: |
  CiscoSecureEndpoint
  | where EventMessage has 'Suspected ransomware'
  | extend HostCustomEntity = DstHostname, MalwareCustomEntity = ThreatName
queryFrequency: 15m
description: |
  'This rule is triggered when possible ransomware activity is detected on host.'
id: c9629114-0f49-4b50-9f1b-345287b2eebf
triggerThreshold: 0
queryPeriod: 15m
version: 1.0.0
kind: Scheduled
status: Available
severity: High
requiredDataConnectors:
- connectorId: CiscoSecureEndpoint
  dataTypes:
  - CiscoSecureEndpoint
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cisco%20Secure%20Endpoint/Analytic%20Rules/CiscoSERansomwareActivityOnHost%20copy.yaml
relevantTechniques:
- T1486
tactics:
- Impact
entityMappings:
- fieldMappings:
  - identifier: HostName
    columnName: HostCustomEntity
  entityType: Host
- fieldMappings:
  - identifier: Name
    columnName: MalwareCustomEntity
  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/c9629114-0f49-4b50-9f1b-345287b2eebf')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/c9629114-0f49-4b50-9f1b-345287b2eebf')]",
      "properties": {
        "alertRuleTemplateName": "c9629114-0f49-4b50-9f1b-345287b2eebf",
        "customDetails": null,
        "description": "'This rule is triggered when possible ransomware activity is detected on host.'\n",
        "displayName": "Cisco SE - Ransomware Activity",
        "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%20Secure%20Endpoint/Analytic%20Rules/CiscoSERansomwareActivityOnHost%20copy.yaml",
        "query": "CiscoSecureEndpoint\n| where EventMessage has 'Suspected ransomware'\n| extend HostCustomEntity = DstHostname, MalwareCustomEntity = ThreatName\n",
        "queryFrequency": "PT15M",
        "queryPeriod": "PT15M",
        "severity": "High",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Impact"
        ],
        "techniques": [
          "T1486"
        ],
        "templateVersion": "1.0.0",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}