Monitor activity log alert does not exist for "Delete Network Security Group Rule" events Affecting Monitor service in Azure


Severity

0.0
medium
0
10
    Severity Framework
    Snyk CCSS
    Rule category
    Monitoring / Network

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  • Snyk ID SNYK-CC-00682
  • credit Snyk Research Team

Description

Monitoring for "Delete Network Security Group Rule" events gives insight into network access changes and may reduce the time it takes to detect suspicious activity.

How to fix?

Set field operationName to Microsoft.Network/networkSecurityGroups/securityRules/delete and set enabled to true.

Example Configuration

{
    "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
    "contentVersion": "1.0.0.0",
    "resources": [
        {
            "type": "Microsoft.Insights/activityLogAlerts",
            "apiVersion": "2017-04-01",
            "name": "allowed1",
            "location": "global",
            "properties": {
                "scopes": [
                    "[subscription().id]"
                ],
                "condition": {
                    "allOf": [
                        {
                            "field": "category",
                            "equals": "Administrative"
                        },
                        {
                            "field": "operationName",
                            "equals": "Microsoft.Network/networkSecurityGroups/securityRules/delete"
                        }
                    ]
                },
                "actions": {
                    "actionGroups": []
                },
                "enabled": true
            }
        }
    ]
}

References