Cisco WSA - Internet access from public IP
Id | 4250b050-e1c6-4926-af04-9484bbd7e94f |
Rulename | Cisco WSA - Internet access from public IP |
Description | Detects internet access from public IP. |
Severity | Medium |
Tactics | InitialAccess |
Techniques | T1189 |
Required data connectors | CiscoWSA SyslogAma |
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/CiscoWSA/Analytic Rules/CiscoWSAPublicIPSource.yaml |
Version | 1.0.1 |
Arm template | 4250b050-e1c6-4926-af04-9484bbd7e94f.json |
let ip_except = dynamic(['127.0.0.2']); //Add exceptions to this list
CiscoWSAEvent
| where ipv4_is_private(SrcIpAddr) == false
| extend IPCustomEntity = SrcIpAddr
entityMappings:
- entityType: IP
fieldMappings:
- identifier: Address
columnName: IPCustomEntity
queryFrequency: 1h
name: Cisco WSA - Internet access from public IP
kind: Scheduled
tactics:
- InitialAccess
triggerThreshold: 0
query: |
let ip_except = dynamic(['127.0.0.2']); //Add exceptions to this list
CiscoWSAEvent
| where ipv4_is_private(SrcIpAddr) == false
| extend IPCustomEntity = SrcIpAddr
relevantTechniques:
- T1189
triggerOperator: gt
queryPeriod: 1h
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/CiscoWSA/Analytic Rules/CiscoWSAPublicIPSource.yaml
severity: Medium
status: Available
id: 4250b050-e1c6-4926-af04-9484bbd7e94f
requiredDataConnectors:
- connectorId: CiscoWSA
dataTypes:
- CiscoWSAEvent
- connectorId: SyslogAma
datatypes:
- Syslog
version: 1.0.1
description: |
'Detects internet access from public IP.'
{
"$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/4250b050-e1c6-4926-af04-9484bbd7e94f')]",
"kind": "Scheduled",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/4250b050-e1c6-4926-af04-9484bbd7e94f')]",
"properties": {
"alertRuleTemplateName": "4250b050-e1c6-4926-af04-9484bbd7e94f",
"customDetails": null,
"description": "'Detects internet access from public IP.'\n",
"displayName": "Cisco WSA - Internet access from public IP",
"enabled": true,
"entityMappings": [
{
"entityType": "IP",
"fieldMappings": [
{
"columnName": "IPCustomEntity",
"identifier": "Address"
}
]
}
],
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/CiscoWSA/Analytic Rules/CiscoWSAPublicIPSource.yaml",
"query": "let ip_except = dynamic(['127.0.0.2']); //Add exceptions to this list\nCiscoWSAEvent\n| where ipv4_is_private(SrcIpAddr) == false\n| extend IPCustomEntity = SrcIpAddr\n",
"queryFrequency": "PT1H",
"queryPeriod": "PT1H",
"severity": "Medium",
"status": "Available",
"subTechniques": [],
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"InitialAccess"
],
"techniques": [
"T1189"
],
"templateVersion": "1.0.1",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0
},
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
}
]
}