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Grupo espacosaudeintegral

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Event Log Forwarding


Event log management is a critical skill to learn in all Windows environments. Activity is being recorded to Windows event logs every second and it acts as not only a security tool but also as a vital troubleshooting aid. With a feature called Windows Event Forwarding (WEF), Windows can send events to the Windows event collector from remote machines.

WEF is a service that allows you to forward events from multiple Windows servers and collect them in one spot. The service has two main components; a forwarder and a collector. A collector is a service running on a Windows server that collects all events sent to it from an event log forwarder.

The next step is to configure one or more Windows servers to begin forwarding event logs to the collector. The easiest way to do so is by creating a GPO. This GPO can then be applied to one or more OUs which contain the servers to send events from.

Note: Many of the event logs in Windows Server already provide the Network Service account access to the common event logs like Application and System. But the account is not given access to the Security event log and other custom event logs.

1. Begin by opening up a command prompt and running wevtutil gl security. This will provide various information about the Security event log. But the piece to pay attention to is the channelAccess SDDL.

6. Click Advanced in the Subscription Properties window. Now select Minimize Latency. This setting will ensure the collector will receive events as soon as possible and also to help it catch up if it gets behind.

For ATA versions 1.8 and higher, event collection configuration is no longer necessary for ATA Lightweight Gateways. The ATA Lightweight Gateway now read events locally, without the need to configure event forwarding.

To enhance detection capabilities, ATA needs the following Windows events: 4776, 4732, 4733, 4728, 4729, 4756, 4757, 7045. These can either be read automatically by the ATA Lightweight Gateway or in case the ATA Lightweight Gateway is not deployed, it can be forwarded to the ATA Gateway in one of two ways, by configuring the ATA Gateway to listen for SIEM events or by configuring Windows Event Forwarding.

After configuring port mirroring from the domain controllers to the ATA Gateway, use the following instructions to configure Windows Event forwarding using Source Initiated configuration. This is one way to configure Windows Event forwarding.

To accomplish this functionality, there are two different subscriptions published to client devices - the Baseline subscription and the suspect subscription. The Baseline subscription enrolls all devices in your organization, and a Suspect subscription only includes devices that have been added by you. The Suspect subscription collects more events to help build context for system activity and can quickly be updated to accommodate new events and/or scenarios as needed without impacting baseline operations.

This implementation helps differentiate where events are ultimately stored. Baseline events can be sent to devices with online analytical capability, such as Security Event Manager (SEM), while also sending events to a MapReduce system, such as HDInsight or Hadoop, for long-term storage and deeper analysis. Events from the Suspect subscription are sent directly to a MapReduce system due to volume and lower signal/noise ratio, they're largely used for host forensic analysis.

Event generation on a device must be enabled either separately or as part of the GPO for the baseline WEF implementation, including enabling of disabled event logs and setting channel permissions. For more info, see Appendix C - Event channel settings (enable and channel access) methods. This condition is because WEF is a passive system regarding the event log. It can't change the size of event log files, enable disabled event channels, change channel permissions, or adjust a security audit policy. WEF only queries event channels for existing events. Additionally, having e


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