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Spotting the Adversary with Windows Event Log Monitoring

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Figure 8: Enabling WinRM listeners<br />

Figure 9: WinRM listener's IP Filter Options<br />

Within <strong>the</strong> Allow automatic configurations of listeners dialog, <strong>the</strong> IPv4/IPv6 filter values should be set<br />

to *. This ensures that WinRM starts running and listens on <strong>the</strong> “any” IP address (IPv4 is 0.0.0.0 and IPv6<br />

is “::”) for both protocols. The IPv6 filter is not required to enable a WinRM listener. Enabling an IPv6<br />

listener is an administrative decision. The WinRM service only listens on an IPv4 address when no IPv6<br />

address (or *) is supplied for <strong>the</strong> filter.<br />

2.4.3 Enabling <strong>Event</strong> Forwarding Policy<br />

The source needs to be configured to forward events to <strong>the</strong> targeted subscription manager. The<br />

subscription manager (collector) hosts all <strong>the</strong> subscriptions created on <strong>the</strong> collector. The source needs<br />

to contact <strong>the</strong> manager to retrieve <strong>the</strong> list of subscriptions. These subscriptions specify <strong>the</strong> events to<br />

forward. Once <strong>the</strong> source ga<strong>the</strong>rs all <strong>the</strong> events pertaining to <strong>the</strong>se subscriptions, <strong>the</strong> events will be<br />

delivered to <strong>the</strong> collector.<br />

The Configure <strong>the</strong> server address, refresh interval, and issuer certificate authority of a target policy<br />

sets <strong>the</strong> configuration settings on how to communicate <strong>with</strong> <strong>the</strong> collector. This policy sets <strong>the</strong> collector’s<br />

internet address, how often to send events to <strong>the</strong> collector, and a thumbprint of <strong>the</strong> client’s certificate if<br />

using HTTPS. This policy must be enabled to forward events.<br />

<strong>Event</strong> Forwarding is <strong>the</strong> main component for enabling event monitoring in an enterprise. <strong>Event</strong><br />

Forwarding policies can be located by navigating to Computer Configuration > Policies > Administrative<br />

Templates > <strong>Windows</strong> Components > <strong>Event</strong> Forwarding.<br />

To enable <strong>Event</strong> Forwarding:<br />

1. Set <strong>the</strong> Configure <strong>the</strong> server address, refresh interval, and issuer certificate authority of a<br />

target Subscription Manager policy to Enabled<br />

2. Click <strong>the</strong> Show… button<br />

13

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