initial copy of Accelerynt-Security AS-Recurring-Host-Entity repo

Playbooks/AS-Recurring-Host-Entity/README.md

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+# AS-Recurring-Host-Entity
+
+Author: Accelerynt
+
+For any technical questions, please contact info@accelerynt.com  
+
+[![Deploy to Azure](https://aka.ms/deploytoazurebutton)](https://portal.azure.com/#create/Microsoft.Template/uri/https%3A%2F%2Fraw.Googleusercontent.com%2FAccelerynt-Security%2FAS-Recurring-Host-Entity%2Fmain%2Fazuredeploy.json)
+[![Deploy to Azure Gov](https://aka.ms/deploytoazuregovbutton)](https://portal.azure.us/#create/Microsoft.Template/uri/https%3A%2F%2Fraw.Googleusercontent.com%2FAccelerynt-Security%2FAS-Recurring-Host-Entity%2Fmain%2Fazuredeploy.json)       
+
+This playbook is intended to be run from a Microsoft Sentinel Incident. It will take the Hosts from the Incident entities list and search the Microsoft Sentinel SecurityAlert logs for other entities containing the same Hosts. A comment noting the alerts the Hosts have previously appeared in will be added to the Incident.
+
+![RecurringHostEntity_Demo_1](Images/RecurringHostEntity_Demo_1.png)
+
+
+#
+### Requirements
+                                                                                                                            
+The following items are required under the template settings during deployment: 
+
+* The [Microsoft Sentinel Workspace Name](https://github.com/Accelerynt-Security/AS-Recurring-Host-Entity#microsoft-sentinel-workspace-name) your SecurityAlert logs will be pulled from. 
+
+# 
+### Setup
+                                                                                                                             
+#### Microsoft Sentinel Workspace Name:
+
+Navigate to the Microsoft Sentinel page and take note of the Resource/Workspace name this Logic App will be deployed to:
+
+https://portal.azure.com/#view/HubsExtension/BrowseResource/resourceType/microsoft.securityinsightsarg%2Fsentinel
+
+![RecurringHostEntity_Sentinel_Workspace_1](Images/RecurringHostEntity_Sentinel_Workspace_1.png)
+
+#
+### Deployment                                                                                                         
+                                                                                                        
+To configure and deploy this playbook:
+
+Open your browser and ensure you are logged into your Microsoft Sentinel workspace. In a separate tab, open the link to our playbook on the Accelerynt Security Google Repository:
+
+https://Google.com/Accelerynt-Security/AS-Recurring-Host-Entity
+
+[![Deploy to Azure](https://aka.ms/deploytoazurebutton)](https://portal.azure.com/#create/Microsoft.Template/uri/https%3A%2F%2Fraw.Googleusercontent.com%2FAccelerynt-Security%2FAS-Recurring-Host-Entity%2Fmain%2Fazuredeploy.json)
+[![Deploy to Azure Gov](https://aka.ms/deploytoazuregovbutton)](https://portal.azure.us/#create/Microsoft.Template/uri/https%3A%2F%2Fraw.Googleusercontent.com%2FAccelerynt-Security%2FAS-Recurring-Host-Entity%2Fmain%2Fazuredeploy.json)                                             
+
+Click the "**Deploy to Azure**" button at the bottom and it will bring you to the custom deployment template.
+
+In the **Project Details** section:
+
+* Select the "**Subscription**" and "**Resource Group**" from the dropdown boxes you would like the playbook deployed to.  
+
+In the **Instance Details** section:   
+
+* **Playbook Name**: This can be left as "**AS-Recurring-Host-Entity**" or you may change it.
+
+* **Sentinel Resource Name**: Enter the name of the Sentinel Resource/Workspace name noted in [Microsoft Sentinel Workspace Name](https://github.com/Accelerynt-Security/AS-Recurring-Host-Entity#microsoft-sentinel-workspace-name)
+
+Towards the bottom, click on "**Review + create**". 
+
+![RecurringHostEntity_Deploy_1](Images/RecurringHostEntity_Deploy_1.png)
+
+Once the resources have validated, click on "**Create**".
+
+![RecurringHostEntity_Deploy_2](Images/RecurringHostEntity_Deploy_2.png)
+
+The resources should take around a minute to deploy. Once the deployment is complete, you can expand the "**Deployment details**" section to view them.
+Click the one corresponding to the Logic App.
+
+![RecurringHostEntity_Deploy_3](Images/RecurringHostEntity_Deploy_3.png)
+
+Click on the “**Edit**” button. This will bring you into the Logic Apps Designer.
+
+![RecurringHostEntity_Deploy_4](Images/RecurringHostEntity_Deploy_4.png)
+
+Before the playbook can be run successfully, the "**azuremonitorlogs**" connection used in the first for each loop needs to be authorized, or an existing authorized connection may be alternatively selected. To validate the "**azuremonitorlogs**" connection, expand the first step in the for each loop labeled "**Connections**" and click the exclamation point icon next to the name matching the playbook.
+
+![RecurringHostEntity_Deploy_5](Images/RecurringHostEntity_Deploy_5.png)
+
+Select "**Logic Apps Managed Identity**" for the "**Authentication Type**", then click "**Create**".  
+
+![RecurringHostEntity_Deploy_6](Images/RecurringHostEntity_Deploy_6.png)
+
+#
+### Microsoft Sentinel Contributor Role
+
+After deployment, you will need to give the system assigned managed identity the "**Microsoft Sentinel Contributor**" role. This will enable the Logic App to add comments to Incidents. Navigate to the Log Analytics Workspaces page and select the same workspace the playbook is located in:
+
+https://portal.azure.com/#view/HubsExtension/BrowseResource/resourceType/Microsoft.OperationalInsights%2Fworkspaces
+
+Select the "**Access control (IAM)**" option from the menu blade, then click "**Add role assignment**".
+
+![RecurringHostEntity_Add_Contributor_Role_1](Images/RecurringHostEntity_Add_Contributor_Role_1.png)
+
+Select the "**Microsoft Sentinel Contributor**" role, then click "**Next**".
+
+![RecurringHostEntity_Add_Contributor_Role_2](Images/RecurringHostEntity_Add_Contributor_Role_2.png)
+
+Select the "**Managed identity**" option, then click "**Select Members**". Under the subscription the Logic App is located, set the value of "**Managed identity**" to "**Logic app**". Next, enter "**AS-Recurring-Host-Entity**", or the alternative playbook name used during deployment, in the field labeled "**Select**". Select the playbook, then click "**Select**".
+
+![RecurringHostEntity_Add_Contributor_Role_3](Images/RecurringHostEntity_Add_Contributor_Role_3.png)
+
+Continue on to the "**Review + assign**" tab and click "**Review + assign**".
+
+![RecurringHostEntity_Add_Contributor_Role_4](Images/RecurringHostEntity_Add_Contributor_Role_4.png)