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MCP (Microsoft Cloud Platform) provides a robust framework for integrating LLM applications with various tools and data sources. However, improper authorization logic within the MCP server may result in sensitive data exposure and misapplied access controls. To uphold security and compliance, the following KQL query helps detect newly deployed Azure MCP instances within your MDE (Microsoft Defender for Endpoint) environment.
DeviceNetworkEvents | where TimeGenerated > ago(1h) | where ActionType == "ListeningConnectionCreated" | where LocalPort == 5008 | where InitiatingProcessCommandLine has "azure/mcp"
You Should Know:
1. Securing MCP Server Configurations
Ensure MCP servers enforce strict authentication and authorization policies. Use Azure AD for identity management and implement Role-Based Access Control (RBAC).
PowerShell Command to Verify Azure RBAC Roles:
Get-AzRoleAssignment -Scope "/subscriptions/<SUBSCRIPTION_ID>/resourceGroups/<RESOURCE_GROUP>"
2. Monitoring Suspicious MCP Connections
Deploy Azure Sentinel rules to detect unauthorized access attempts.
KQL Query for Sentinel:
AzureDiagnostics | where ResourceProvider == "MICROSOFT.COMPUTE" | where OperationName == "Microsoft.Compute/virtualMachines/login/action" | where ResultType == "Failure"
3. Hardening MCP Network Security
Restrict MCP server ports (e.g., 5008) using Azure Network Security Groups (NSG).
Azure CLI Command:
az network nsg rule create --name "Deny-MCP-Port-5008" --nsg-name "MyNSG" --priority 100 --resource-group "MyRG" --access Deny --direction Inbound --protocol Tcp --destination-port-ranges 5008
4. Logging and Auditing MCP Activity
Enable Azure Monitor Logs and forward logs to a SIEM for analysis.
Bash Command to Check Log Analytics Workspace:
az monitor log-analytics workspace list --resource-group "MyRG"
5. Automating Threat Detection with MDE
Use Microsoft Defender for Endpoint to detect MCP-related anomalies.
PowerShell Command to Check MDE Alerts:
Get-MdeMachineAlert -MachineName "MyVM"
What Undercode Say:
MCP implementations require continuous monitoring, strict access controls, and automated threat detection to prevent data breaches. Leverage KQL, Azure Sentinel, and PowerShell to enforce security best practices. Always audit logs, restrict unnecessary ports, and apply Zero Trust principles to mitigate risks.
Expected Output:
- Secure MCP deployments with RBAC and NSG rules.
- Monitor using KQL queries in MDE and Sentinel.
- Automate threat detection with PowerShell and Azure CLI.
Relevant URLs:
- Understanding and Mitigating Security Risks in MCP Implementations
- Wiz MCP Security Research Briefing
References:
Reported By: 0x534c Cybersecurity – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
