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	1.0.2
Arm template	795edf2d-cf3e-45b5-8452-fe6c9e6a582e.json

KQL

CommonSecurityLog
| where isempty(CommunicationDirection)
| where DeviceEventClassID in ("733101","733102","733103","733104","733105")
| extend HostName = tostring(split(DeviceName, ".")[0]), DomainIndex = toint(indexof(DeviceName, '.'))
| extend HostNameDomain = iff(DomainIndex != -1, substring(DeviceName, DomainIndex + 1), DeviceName)

YAML

relevantTechniques:
- T1046
- T1498
name: Cisco ASA - threat detection message fired
requiredDataConnectors:
- dataTypes:
  - CommonSecurityLog
  connectorId: CiscoASA
entityMappings:
- fieldMappings:
  - identifier: FullName
    columnName: DeviceName
  entityType: Host
- fieldMappings:
  - identifier: Address
    columnName: SourceIP
  entityType: IP
triggerThreshold: 0
id: 795edf2d-cf3e-45b5-8452-fe6c9e6a582e
tactics:
- Discovery
- Impact
version: 1.0.2
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/CiscoASA/Analytic Rules/CiscoASA-ThreatDetectionMessage.yaml
queryPeriod: 1h
kind: Scheduled
queryFrequency: 1h
severity: Medium
status: Available
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'  
query: |
  CommonSecurityLog
  | where isempty(CommunicationDirection)
  | where DeviceEventClassID in ("733101","733102","733103","733104","733105")
  | extend HostName = tostring(split(DeviceName, ".")[0]), DomainIndex = toint(indexof(DeviceName, '.'))
  | extend HostNameDomain = iff(DomainIndex != -1, substring(DeviceName, DomainIndex + 1), DeviceName)  
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/795edf2d-cf3e-45b5-8452-fe6c9e6a582e')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/795edf2d-cf3e-45b5-8452-fe6c9e6a582e')]",
      "properties": {
        "alertRuleTemplateName": "795edf2d-cf3e-45b5-8452-fe6c9e6a582e",
        "customDetails": null,
        "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",
        "displayName": "Cisco ASA - threat detection message fired",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Host",
            "fieldMappings": [
              {
                "columnName": "DeviceName",
                "identifier": "FullName"
              }
            ]
          },
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "SourceIP",
                "identifier": "Address"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/CiscoASA/Analytic Rules/CiscoASA-ThreatDetectionMessage.yaml",
        "query": "CommonSecurityLog\n| where isempty(CommunicationDirection)\n| where DeviceEventClassID in (\"733101\",\"733102\",\"733103\",\"733104\",\"733105\")\n| extend HostName = tostring(split(DeviceName, \".\")[0]), DomainIndex = toint(indexof(DeviceName, '.'))\n| extend HostNameDomain = iff(DomainIndex != -1, substring(DeviceName, DomainIndex + 1), DeviceName)\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "PT1H",
        "severity": "Medium",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Discovery",
          "Impact"
        ],
        "techniques": [
          "T1046",
          "T1498"
        ],
        "templateVersion": "1.0.2",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}