azure-monitor-audit – skill DevOps & Hạ tầng cho agent AI

Azure Monitor Audit

Audit Azure activity with Monitor, Activity Logs, and Log Analytics for compliance, security, and operational visibility.

When to Use

• Enabling centralized audit logging across Azure subscriptions
• Meeting compliance requirements for SOC 2, HIPAA, PCI DSS, or ISO 27001
• Investigating security incidents or unauthorized activity in Azure
• Setting up alerting on administrative and security events
• Building compliance dashboards and automated evidence collection

These are paid provisioning/configuration examples requiring authorized Azure access, not privilege-free checks. Confirm tenant/subscription, data residency, cost/retention and alert recipients before writes. Inspect supported categories for each resource and verify actual ingestion after setup; Entra SigninLogs/AuditLogs require their own connector/licensing, and SQL diagnostics do not enable SQL auditing by themselves. Never place real PagerDuty integration keys in committed command URLs.

Create Log Analytics Workspace

# Create resource group for audit resources
az group create \
  --name rg-audit \
  --location eastus

# Create Log Analytics workspace
az monitor log-analytics workspace create \
  --resource-group rg-audit \
  --workspace-name audit-workspace \
  --location eastus \
  --retention-time 365 \
  --sku PerGB2018

# Get workspace ID for later use
WORKSPACE_ID=$(az monitor log-analytics workspace show \
  --resource-group rg-audit \
  --workspace-name audit-workspace \
  --query id -o tsv)

# Verify required data connectors separately; workspace creation does not ingest logs.

Diagnostic-setting retentionPolicy no longer enforces storage retention (retired September30,2025); use reviewed Azure Storage lifecycle policies and separately configure Log Analytics table/workspace retention. Retention is not immutability and diagnostic settings do not establish regulatory compliance.

Configure Diagnostic Settings for Subscription Activity Log

# Export subscription activity log to Log Analytics
az monitor diagnostic-settings subscription create \
  --name activity-log-to-workspace \
  --location global \
  --workspace "$WORKSPACE_ID" \
  --logs '[
    {"category": "Administrative", "enabled": true},
    {"category": "Security", "enabled": true},
    {"category": "ServiceHealth", "enabled": true},
    {"category": "Alert", "enabled": true},
    {"category": "Recommendation", "enabled": true},
    {"category": "Policy", "enabled": true},
    {"category": "Autoscale", "enabled": true},
    {"category": "ResourceHealth", "enabled": true}
  ]'

# Also archive to storage account for long-term retention
az storage account create \
  --name auditlogsarchive \
  --resource-group rg-audit \
  --location eastus \
  --sku Standard_GRS \
  --kind StorageV2 \
  --min-tls-version TLS1_2 \
  --allow-blob-public-access false

az monitor diagnostic-settings subscription create \
  --name activity-log-to-storage \
  --location global \
  --storage-account /subscriptions/{sub}/resourceGroups/rg-audit/providers/Microsoft.Storage/storageAccounts/auditlogsarchive \
  --logs '[
    {"category": "Administrative", "enabled": true},
    {"category": "Security", "enabled": true}
  ]'

Resource-Level Diagnostic Settings

# Enable diagnostics for Azure Key Vault
az monitor diagnostic-settings create \
  --name keyvault-audit \
  --resource /subscriptions/{sub}/resourceGroups/{rg}/providers/Microsoft.KeyVault/vaults/{vault} \
  --workspace "$WORKSPACE_ID" \
  --logs '[
    {"category": "AuditEvent", "enabled": true},
    {"category": "AzurePolicyEvaluationDetails", "enabled": true}
  ]' \
  --metrics '[
    {"category": "AllMetrics", "enabled": true}
  ]'

# Enable diagnostics for Azure SQL Database
az monitor diagnostic-settings create \
  --name sql-audit \
  --resource /subscriptions/{sub}/resourceGroups/{rg}/providers/Microsoft.Sql/servers/{server}/databases/{db} \
  --workspace "$WORKSPACE_ID" \
  --logs '[
    {"category": "SQLSecurityAuditEvents", "enabled": true},
    {"category": "SQLInsights", "enabled": true},
    {"category": "AutomaticTuning", "enabled": true}
  ]'

# Enable diagnostics for Azure App Service
az monitor diagnostic-settings create \
  --name appservice-audit \
  --resource /subscriptions/{sub}/resourceGroups/{rg}/providers/Microsoft.Web/sites/{app} \
  --workspace "$WORKSPACE_ID" \
  --logs '[
    {"category": "AppServiceHTTPLogs", "enabled": true},
    {"category": "AppServiceAuditLogs", "enabled": true},
    {"category": "AppServiceIPSecAuditLogs", "enabled": true},
    {"category": "AppServicePlatformLogs", "enabled": true}
  ]'

# NSG diagnostic events below are not flow logs. New deployments should use
# Network Watcher VNet flow logs; new NSG flow logs cannot be created.
# Inspect supported diagnostic categories before enabling these event categories.
az monitor diagnostic-settings create \
  --name nsg-diagnostic-events \
  --resource /subscriptions/{sub}/resourceGroups/{rg}/providers/Microsoft.Network/networkSecurityGroups/{nsg} \
  --workspace "$WORKSPACE_ID" \
  --logs '[
    {"category": "NetworkSecurityGroupEvent", "enabled": true},
    {"category": "NetworkSecurityGroupRuleCounter", "enabled": true}
  ]'

Azure Policy for Diagnostic Settings Enforcement

Discover the applicable built-in policy definition/version and its actual parameter schema before assignment; do not reuse hardcoded unrelated GUIDs. Review scope, managed identity, deployment location, role assignments and remediation tasks for DeployIfNotExists. Existing resources may need a separate authorized remediation. Record current assignments and test the exact definition on a small scope before subscription-wide changes.

KQL Queries for Security Investigation

// Failed sign-in attempts with location and device details
SigninLogs
| where TimeGenerated > ago(24h)
| where ResultType != "0"
| summarize FailureCount = count(),
            DistinctIPs = dcount(IPAddress),
            Locations = make_set(tostring(LocationDetails.city))
    by UserPrincipalName, ResultDescription, AppDisplayName
| where FailureCount > 5
| order by FailureCount desc

// Successful sign-ins from unusual locations
SigninLogs
| where TimeGenerated > ago(7d)
| where ResultType == "0"
| extend City = tostring(LocationDetails.city),
         Country = tostring(LocationDetails.countryOrRegion)
| summarize LoginCount = count(),
            Cities = make_set(City),
            Countries = make_set(Country)
    by UserPrincipalName
| where array_length(Countries) > 2

// Risky sign-ins requiring investigation
SigninLogs
| where TimeGenerated > ago(7d)
| where RiskLevelDuringSignIn in ("medium", "high")
| project TimeGenerated, UserPrincipalName, IPAddress,
          LocationDetails.city, RiskLevelDuringSignIn,
          RiskEventTypes_V2, AppDisplayName
| order by TimeGenerated desc

// Administrative operations across subscriptions
AzureActivity
| where TimeGenerated > ago(24h)
| where CategoryValue == "Administrative"
| where OperationNameValue contains "write" or OperationNameValue contains "delete"
| where ActivityStatusValue == "Success"
| project TimeGenerated, Caller, OperationNameValue,
          ResourceGroup, Resource, SubscriptionId
| order by TimeGenerated desc

// Key Vault access patterns
AzureDiagnostics
| where ResourceType == "VAULTS"
| where TimeGenerated > ago(24h)
| where OperationName in ("SecretGet", "SecretSet", "SecretDelete",
                           "KeySign", "KeyDecrypt", "CertificateGet")
| project TimeGenerated, CallerIPAddress, identity_claim_upn_s,
          OperationName, id_s, ResultType
| order by TimeGenerated desc

// Detect changes to Network Security Groups
AzureActivity
| where TimeGenerated > ago(7d)
| where (OperationNameValue contains "securityRules/write" or OperationNameValue contains "securityRules/delete" or OperationNameValue contains "networkSecurityGroups/write")
| where ActivityStatusValue == "Success"
| project TimeGenerated, Caller, OperationNameValue,
          ResourceGroup, Properties
| order by TimeGenerated desc

// Policy compliance is a separate Policy Insights/Resource Graph data source.
// Query the actual configured policy-state source; no PolicyInsights Log Analytics table is assumed.

// Privileged role assignments (PIM)
AuditLogs
| where TimeGenerated > ago(30d)
| where OperationName has_any ("Add member to role", "Add eligible member to role")
| mv-expand Target = TargetResources
| extend TargetType = tostring(Target.type), TargetName = tostring(Target.displayName),
         TargetId = tostring(Target.id), AssignedBy = tostring(InitiatedBy.user.userPrincipalName)
| project TimeGenerated, AssignedBy, TargetType, TargetName, TargetId, OperationName
| order by TimeGenerated desc

Alert Rules

# Create action group for security notifications
az monitor action-group create \
  --resource-group rg-audit \
  --name security-team \
  --short-name SecTeam \
  --

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