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Monitor activity log alert does not exist for "Create or Update 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-00681
  • credit Snyk Research Team
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Description

Monitoring for "Create or Update 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/write 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/write"
                        }
                    ]
                },
                "actions": {
                    "actionGroups": []
                },
                "enabled": true
            }
        }
    ]
}

References