The rule identifies when shared key access is enabled for an Azure storage account, denoted by the configuration parameter 'allowSharedKeyAccess: true'. This access method is less secure compared to Azure AD-based authentication, making it vital to monitor. The rule is triggered when Azure Monitor Activity logs capture storage account modifications that set this access mode. Given that shared key access can pose security risks, particularly in cases where Azure keys might be compromised or misused, this detection serves as an essential control in maintaining the integrity and confidentiality of Azure-based resources. The detection includes a query of Azure Monitor logs to trace the operations related to the storage account over a set time frame, analysis of the source IP against threat intelligence sources, and investigation of recent related activities from the same user or IP address.