Azure Network Security Group Open to the World

Set up the azure integration.

This page is not yet available in Spanish. We are working on its translation.
If you have any questions or feedback about our current translation project, feel free to reach out to us!

Goal

Detect when an Azure network security group allows inbound traffic from all IP Addresses.

Strategy

This rule monitors Azure Activity logs for network changes and detects when the @evt.name has a value of MICROSOFT.NETWORK/NETWORKSECURITYGROUPS/WRITE, @properties.securityRules.properties.direction has a value of Inbound, @properties.securityRules.properties.access has a value of Allow, and @properties.securityRules.properties.sourceAddressPrefix has a value of either 0.0.0.0/0 OR *.

Triage and response

  1. Inspect which Virtual Machines are associated with this security group.
  2. Determine whether this security group and the VMs should permit inbound traffic from all IP addresses.