Cisco ASA - threat detection message fired

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Id	795edf2d-cf3e-45b5-8452-fe6c9e6a582e
Rulename	Cisco ASA - threat detection message fired
Description	Identifies when the Cisco ASA Threat Detection engine fired an alert based on malicious activity occurring on the network inicated by DeviceEventClassID 733101-733105 Resources: https://www.cisco.com/c/en/us/td/docs/security/asa/syslog/b_syslog/syslogs9.html Details on how to further troubleshoot/investigate: https://www.cisco.com/c/en/us/support/docs/security/asa-5500-x-series-next-generation-firewalls/113685-asa-threat-detection.html
Severity	Medium
Tactics	Discovery Impact
Techniques	T1046 T1498
Required data connectors	CiscoASA
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/CiscoASA/Analytic Rules/CiscoASA-ThreatDetectionMessage.yaml
Version	1.0.1
Arm template	795edf2d-cf3e-45b5-8452-fe6c9e6a582e.json

KQL

CommonSecurityLog
| where isempty(CommunicationDirection)
| where DeviceEventClassID in ("733101","733102","733103","733104","733105")
| extend timestamp = TimeGenerated, IPCustomEntity = SourceIP, HostCustomEntity = DeviceName

YAML

severity: Medium
name: Cisco ASA - threat detection message fired
requiredDataConnectors:
- dataTypes:
  - CommonSecurityLog
  connectorId: CiscoASA
id: 795edf2d-cf3e-45b5-8452-fe6c9e6a582e
tactics:
- Discovery
- Impact
queryFrequency: 1h
triggerOperator: gt
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/CiscoASA/Analytic Rules/CiscoASA-ThreatDetectionMessage.yaml
description: |
  'Identifies when the Cisco ASA Threat Detection engine fired an alert based on malicious activity occurring on the network inicated by DeviceEventClassID 733101-733105
  Resources: https://www.cisco.com/c/en/us/td/docs/security/asa/syslog/b_syslog/syslogs9.html
  Details on how to further troubleshoot/investigate: https://www.cisco.com/c/en/us/support/docs/security/asa-5500-x-series-next-generation-firewalls/113685-asa-threat-detection.html'  
triggerThreshold: 0
kind: Scheduled
relevantTechniques:
- T1046
- T1498
query: |
  CommonSecurityLog
  | where isempty(CommunicationDirection)
  | where DeviceEventClassID in ("733101","733102","733103","733104","733105")
  | extend timestamp = TimeGenerated, IPCustomEntity = SourceIP, HostCustomEntity = DeviceName  
entityMappings:
- entityType: Host
  fieldMappings:
  - columnName: HostCustomEntity
    identifier: FullName
- entityType: IP
  fieldMappings:
  - columnName: IPCustomEntity
    identifier: Address
status: Available
version: 1.0.1
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": [
    {
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/795edf2d-cf3e-45b5-8452-fe6c9e6a582e')]",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/795edf2d-cf3e-45b5-8452-fe6c9e6a582e')]",
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules",
      "kind": "Scheduled",
      "apiVersion": "2022-11-01-preview",
      "properties": {
        "displayName": "Cisco ASA - threat detection message fired",
        "description": "'Identifies when the Cisco ASA Threat Detection engine fired an alert based on malicious activity occurring on the network inicated by DeviceEventClassID 733101-733105\nResources: https://www.cisco.com/c/en/us/td/docs/security/asa/syslog/b_syslog/syslogs9.html\nDetails on how to further troubleshoot/investigate: https://www.cisco.com/c/en/us/support/docs/security/asa-5500-x-series-next-generation-firewalls/113685-asa-threat-detection.html'\n",
        "severity": "Medium",
        "enabled": true,
        "query": "CommonSecurityLog\n| where isempty(CommunicationDirection)\n| where DeviceEventClassID in (\"733101\",\"733102\",\"733103\",\"733104\",\"733105\")\n| extend timestamp = TimeGenerated, IPCustomEntity = SourceIP, HostCustomEntity = DeviceName\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "PT1H",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0,
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Discovery",
          "Impact"
        ],
        "techniques": [
          "T1046",
          "T1498"
        ],
        "alertRuleTemplateName": "795edf2d-cf3e-45b5-8452-fe6c9e6a582e",
        "customDetails": null,
        "entityMappings": [
          {
            "fieldMappings": [
              {
                "identifier": "FullName",
                "columnName": "HostCustomEntity"
              }
            ],
            "entityType": "Host"
          },
          {
            "fieldMappings": [
              {
                "identifier": "Address",
                "columnName": "IPCustomEntity"
              }
            ],
            "entityType": "IP"
          }
        ],
        "status": "Available",
        "templateVersion": "1.0.1",
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/CiscoASA/Analytic Rules/CiscoASA-ThreatDetectionMessage.yaml"
      }
    }
  ]
}