USM Anywhere™

AlienVault Agent Installation on Windows Hosts

Role Availability Read-Only Analyst Manager

To install the AlienVault Agent, you must run a script that you access from your USM Anywhere environment. When you run the installation script on the Microsoft Windows host system, the script downloads an .msi file directly from USM Anywhere and the agent automatically registers with your USM Anywhere environment. The installation process also configures a default set of folders, files, and registries to automatically support File Integrity Monitoring (FIM).

You can generate a script that is specific to a selected assetAn IP-addressable host, including but not limited to network devices, virtual servers, and physical servers. and your USM Anywhere environment, or generate a bulk deployment script that you can use to install the agent on multiple Windows host systems.

Note: When you first deploy new AlienVault Agents on your host systems, you should install just a few so that you can assess the events that are collected by the agent and the impact to your data consumption.

While there is no hard limit on the number of agents you can deploy, larger numbers of agents can eventually begin to impact the performance of USM Anywhere by transmitting more data than your pipeline can accommodate, causing latency in receiving and processing information.

Similarly, if your host system is consistently busy, such as a domain controller or an Active Directory (AD) server, deploying an agent on it may slow down its operations.

Note: AlienVault Agents do not currently support the use of a proxy server.

Prerequisites

Before you install the AlienVault Agent on a Windows host system, make sure that you have the following requirements in place for that system.

  • A 64-bit Windows host running Windows 8.1 or later (client version) or Windows Server 2012 or later (server version).

  • The Windows host must have a minimum of 4 GB memory and 2 CPU cores.
  • Transport Layer Security (TLS) 1.2 must be enabled on the host system.
  • PowerShell 3 or higher is installed on the host system.
  • You have login credentials for the host system with full admin rights.

  • Firewall configuration to support resource downloads executed by the agent installation script and ongoing event log transmission to USM Anywhere.

    • Your firewall is configured to allow temporary downloads to the host system using the HTTPS application protocol over port 443 to support resource downloads executed by the agent installation script:

      download.sysinternals.com/files/Sysmon.zip

      cybersecurity.att.com/documentation/resources/downloads/sysmon_config_schema4_0.xml

      prod-usm-saas-agent-config.s3.amazonaws.com/repo/windows/alienvault-agent-<version>.msi

    • Your firewall is configured to allow ongoing outbound connectivity from the host system using the HTTPS application protocol over port 443 to these USM Anywhere endpoints:

      prod-api.agent.alienvault.cloud

      api.agent.alienvault.cloud

      <AWS region>-agent-entrypoint.alienvault.cloud

      • For endpoints that rely on the Amazon Web Services (AWS) region, the endpoint to use depends on the AWS region where your USM Anywhere instance is deployed. See the table below for details. If you are unsure, consult your administrator who set up your USM Anywhere domain.

      Note: AT&T Cybersecurity does not own the IP addresses of these endpoints. While relatively stable, they are subject to change by AWS.

      AlienVault Agent Endpoints by AWS Regions
      Region Endpoint
      Asia Pacific (Tokyo)

      ap-northeast-1-agent-entrypoint.alienvault.cloud
      Asia Pacific (Mumbai)

      ap-south-1-agent-entrypoint.alienvault.cloud
      Asia Pacific (Sydney)

      ap-southeast-2-agent-entrypoint.alienvault.cloud
      Canada (Central)

      ca-central-1-agent-entrypoint.alienvault.cloud
      EU (Frankfurt)

      eu-central-1-agent-entrypoint.alienvault.cloud
      EU (Ireland)

      eu-west-1-agent-entrypoint.alienvault.cloud
      EU (London)

      eu-west-2-agent-entrypoint.alienvault.cloud
      South America (São Paulo)

      sa-east-1-agent-entrypoint.alienvault.cloud
      US East (N. Virginia)

      us-east-1-agent-entrypoint.alienvault.cloud
      US West (Oregon)

      us-west-2-agent-entrypoint.alienvault.cloud

AlienVault Agent Installation on a Single Host System

For a Windows host system that is already identified as an asset in your USM Anywhere environment, you can install the agent using a generated PowerShell script to run on that Windows host system. You can generate this script for the specific asset from the AlienVault Agents page (Data Sources > Agents) or from the Asset Details page for the asset.

Note: If a single host system is not in your Asset inventory through discovery by a deployed USM Anywhere Sensor, you can manually add the asset using its IP address or fully qualified domain name (FQDN). See Adding Assets for more information.

Alternatively, you can use a script for multiple assets and then use the information provided by the unassociated agent to create a new asset.

Important: Some antivirus software may block the osqueryd service and prevent it from starting. If your service is not starting because of antivirus software, you need to add the \Program Files\osquery\osqueryd\ path to your antivirus exclusions policy.

  1. In USM Anywhere, go to Data Sources > Agents.
  2. Click Windows Deployment Script.
  3. In the dialog box, select the Single Asset tab.

  4. Specify the Asset where you want to install the agent.

    You can start typing the name or IP address of the asset in the field to display matching items and select the one you want.

    Select the asset where you want to install the AlienVault Agent

    Or you can click the Browse Assets link to open the Select Asset dialog and browse the asset list to make your selection.

  5. Click Copy to clipboard.

    Click Copy to clipboard to copy the generated PowerShell script

  6. Use a remote access client to connect and log in to the Windows host system.
  7. Use the Run as Administrator option to open the PowerShell window.
  8. Run the copied script.
  1. Go to Environment > Assets.

  2. (Optional.) Use the Search & Filters options to filter the list and help you to locate the asset you want.

    See Searching for Assets for more information.

  3. Click the icon next to the asset name and select Full Details.

  4. In the Agent Status section, click Deploy Agent.

    Click Deploy Agent to generate an AlienVault Agent installation script for the asset

  5. Click Copy to clipboard.

    Click Copy to clipboard to copy the generated PowerShell script

  6. Use a remote access client to connect and log in to the Windows host system.
  7. Use the Run as Administrator option to open the PowerShell window.
  8. Run the copied script.

AlienVault Agent Installation on Multiple Host Systems

If you have multiple Windows host systems that are not currently in your USM Anywhere asset inventory or you don't want to generate a separate script for each asset, you can install the AlienVault Agent using a generated PowerShell script on any Windows host system that meets the prerequisite requirements. You can generate this script from the Agents page (Data Sources > Agents).

Note: If you use a multiple asset installation script to execute bulk deployment across multiple host systems, the script does not have the unique asset ID. In this case, USM Anywhere attempts to associate the AlienVault Agent with an existing asset if there is enough information and it can make a definitive match. After a successful deployment of the agent on a host, it sends only heartbeat events until it is has an asset association. These heartbeat events include basic information about the host system, including network interfaces and IP address, as well as the asset UUID.

When a deployed agent does not have an associated asset, you must make this association in USM Anywhere in order to enable queries and log collection for the host system. For more information, see Agent and Asset Associations.

To generate an agent deployment script for multiple host systems

  1. In USM Anywhere, go to Data Sources > Agents.

  2. Click Windows Deployment Script.

    In the dialog box, the Multiple Assets tab is selected by default.

  3. Click Copy to clipboard.

    Click Copy to clipboard to copy the generated PowerShell script

  4. Run the script on each Windows host system where you want to deploy the agent.

    • Use a remote access client to connect and log in to the Windows host system.
    • Use the Run as Administrator option to open the PowerShell window.
    • Run the copied script.

Additional AlienVault Agent Commands

The AlienVault Agent also comes with a PowerShell script to control other features of the agent, such as starting, stopping, restarting, updating, and uninstalling the agent. See the The AlienVault Agent Command Script and Agent Updates documentation page for more information of the agent command script, including the file location and a list of the commands.

Installation Error Resolution

After the AlienVault Agent is installed, the Asset UID associations are stored in the osquery.flags file in your system. Asset changes, specifically changes that result in an asset being removed and added back to USM Anywhere, can cause issues with the way an agent associates with those assets in the future if you need to reinstall the agent for any reason.

If you encounter an error during installation of an agent, you need to remove the osquerydirectory before you reinstall the agent. To do this, delete the C:\Program Files\osquery folder.