CCSS (Common Configuration Scoring System) is a set of measures used to determine the severity of the rule.
Each rule is associated with a high-level category. For example IAM, Container, Monitoring, Logging, Network, etc.
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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
}
}
]
}
Set criteria.operation_name to Microsoft.Network/networkSecurityGroups/securityRules/delete and set enabled to true or remove the attribute.
Example Configuration
resource "azurerm_monitor_activity_log_alert" "allowed" {
name = "activity-log-alert-682"
resource_group_name = azurerm_resource_group.example-682.name
scopes = [azurerm_resource_group.example-682.id]
criteria {
operation_name = "Microsoft.Network/networkSecurityGroups/securityRules/delete"
category = "Administrative"
}
}