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Change Auditor 7.1.1 - SIEM Integration User Guide

Integrating Change Auditor and SIEM Tools Subscription Management
Adding the PowerShell module Viewing available commands and help Connecting to Change Auditor Managing subscriptions Working with event subscriptions in the client Managing a Splunk integration Managing an IBM QRadar integration Managing a Micro Focus Security ArcSight Logger and Enterprise Security Manager (ESM) integration Managing a Quest IT Security Search integration (Preview) Managing a Syslog integration
Webhook technical insights

Working with Splunk subscriptions through the client

1
From the Administration Tasks, select Configuration | Event Subscriptions.
2
Click Add Splunk Subscription to enter the required information.
5
Click Next to select the events to forward based on subsystem and event date. Once the subscription is created the starting event date and time cannot be changed.
By default, events start sending after the subscription is created. To change when to begin sending events, click Send events starting and select the desired date and time. The time cannot be more than 30 days prior to the Change Auditor installation date.
6
Click Finish.
1
From the Administration Tasks, select Configuration | Event Subscriptions.
1
From the Administration Tasks, select Configuration | Event Subscriptions.
5
Click Finish.
1
From the Administration Tasks, select Configuration | Event Subscriptions.
1
From the Administration Tasks, select Configuration | Event Subscriptions.
2
Click Refresh.

New-CASplunkEventSubscription

Use this command to create the subscription required to send Change Auditor event data to Splunk.

Table 2. Available parameters

-Connection

A connection obtained by using the Connect-CAClient command. See the Change Auditor Command Guide for details.

-SplunkUrl

Specifies the address of your Splunk instance that will receive the event data.

-EventToken

The unique identifier (token) used by Splunk to confirm that the specified Splunk URL is authorized to accept event data.

The token value is created during the Splunk instance configuration.

-Subsystems

Specifies an array of event subsystems from which to send events. This can be single or multiple subsystems.

NOTE: To obtain an array of subsystems, use the Get-CAEventExportSubsystems command and filter the list to specify the required subsystems.

-StartTime (Optional)

Specifies date and time from which events should be sent. The default is to start sending events from the time when the subscription is created.

For example:

The time will be local unless you specify the required flag to convert to UTC.

-BatchSize (Optional)

Specifies the maximum number of events to include in a single notification. The default is 10000 events.

-Enabled (Optional)

Specifies whether the subscription is enabled or disabled. By default it is enabled.

-HeartbeatUrl (Optional)

Specifies where (URL) to send heartbeat notifications.

-HeartbeatToken (Optional)

The unique identifier (token) used by Splunk to confirm that the specified HeartbeatUrl is authorized to accept heartbeat notifications.

-NotificationInterval (Optional)

Specifies how often (in milliseconds) notifications are sent to the Splunk instance. By default this is set to 0 which results in a continuous stream of events.

-HeartbeatInterval (Optional)

Specifies how often (in milliseconds) heartbeat notifications are sent to the HeartbeatUrl. By default, this is set to every 5 minutes. Setting this to 0 disables the heartbeat notifications.

-AllowedCoordinators (Optional)

Specifies the DNS or NetBIOS name of the coordinators permitted to send events. By default, any coordinator can send the events.

-IncludeO365AADDetails (Optional)

Specifies whether to include the raw JSON event details provided by Microsoft. When set to true, the event will include a field named additionalDetails, containing the raw JSON string for Office 365 and Azure Active Directory events. When set to false, the additionalDetails field is not included.

By default, this is set to true.

Example: Create a subscription to send all subsystems event data to a Splunk instance

$allSubsystems = Get-CAEventExportSubsystems -Connection $connection

New-CASplunkEventSubscription -Connection $connection -SplunkUrl $splunkUrl -EventToken $eventToken -Subsystems $allSubsystems

Get-CASplunkEventSubscriptions

Use this command to see the details of the current Splunk subscriptions.

-Connection

A connection obtained by using the Connect-CAClient command. See the Change Auditor Command Guide for details.

-SubscriptionId (optional)

The ID of an existing Splunk subscription.

If specified, the command will only return the Splunk subscription with that ID. If not specified, all Splunk subscriptions are returned.

You can find this by running this command using just the connection information. It is also returned by the New-CASplunkEventSubscription command.

Get-CASplunkEventSubscriptions -Connection $connection

Command output

The command returns the following information.

Id

The subscription ID.

WebhookSubscriptionId

The webhook subscription ID.

SplunkUrl

The URL where event data is sent.

StartTime

Starting point in time for events being sent.

Subsystems

Subsystems that contain the event data you want to send.

Enabled

Whether the subscription is enabled.

HeartbeatUrl

URL for heartbeat notifications.

LastEventTime

When the last event was sent.

LastEventResponse

Last event response.

For example, statusCode = OK (200), statusCode = Bad Request (400), or statusCode = Internal Server Error (500).

LastHeartbeatTime

When the last heartbeat was sent.

LastHeartbeatResponse

Last heartbeat response.

For example, statusCode = OK (200), statusCode = Bad Request (400), or statusCode = Internal Server Error (500).

EventsSent

Number of events sent.

BatchesSent

Number of batches sent.

HeartbeatsSent

Number of heartbeats sent.

NotificationInterval

How often (in milliseconds) notifications are sent.

HeartbeatInterval

How often (in milliseconds) heartbeat notificaitons are sent to the HeartbeatURL.

BatchSize

Batch size. (The maximum number of events that the active batch size can increase to.)

ActiveBatchSize

The current batch size. (The current number of events to include in a single notification message.) The batch size is automatically adjusted based on network throughput and system performance. Its value never exceeds the specified batch size.

AllowedCoordinators

List of coordinators permitted to send events.

LastCoordinator

The coordinator that is sending events. If the subscription is disabled, this is the last coordinator sending the events.

IncludeO365AADDetails

Identifies whether or not the additionalDetails field with the raw JSON string is included for Office 365 and Azure Active Directory events.

Set-CASplunkEventSubscription

Use this command to modify a Splunk subscription.

Table 2. Available parameters

-Connection

A connection obtained by using the Connect-CAClient command. See the Change Auditor Command Guide for details.

-Subscription

The PSCAEventWebhookStatus object that corresponds to the subscription to modify. This parameter is required if the SubscriptionId parameter is not specified. Use the Get-CASplunkEventSubscriptions command to get a list of objects.

-SubscriptionId

The ID of the subscription to modify. This parameter is required if the Subscription parameter is not specified. Use the Get-CASplunkEventSubscriptions command to find the ID.

-SplunkUrl (Optional)

Specifies the address of your Splunk instance that will receive the event data.

For details, see the Splunk documentation on HTTP Event Collector data inputs.

-EventToken (Optional)

The unique identifier (token) used by Splunk to confirm that the specified SplunkUri is authorized to accept event data.

The token value is created during the Splunk instance configuration.

For details on creating an event collector token, see the Splunk documentation on HTTP Event Collector data inputs.

-BatchSize (Optional)

Specifies the maximum number of events to include in a single notification. The default is 10000 events.

-Enabled (Optional)

Specifies whether the subscription is enabled or disabled. By default it is enabled.

-HeartbeatUrl (Optional)

Specifies where (URL) to send heartbeat notifications.

-HeartbeatToken (Optional)

The unique identifier (token) used by Splunk to confirm that the specified heartbeatUri is authorized to accept heartbeat notifications.

-NotificationInterval (Optional)

Specifies how often (in milliseconds) notifications are sent to the Splunk instance. By default this is set to 0 which results in a continuous stream of events.

-HeartbeatInterval (Optional)

Specifies how often (in milliseconds) heartbeat notifications are sent to the HeartbeatURL. By default, this is set to every 5 minutes. Setting this to 0 disables the heartbeat notifications.

-AllowedCoordinators (Optional)

Specifies the DNS or NetBIOS name of the coordinators permitted to send events. By default, any coordinator can send the events.

-Subsystems (Optional)

Specifies an array of event subsystems from which to send events. This can be single or multiple subsystems.

-IncludeO365AADDetails (Optional)

Specifies whether to include the raw JSON event details provided by Microsoft. When set to true, the event will include a field named additionalDetails, containing the raw JSON string for Office 365 and Azure Active Directory events. When set to false, the additionalDetails field is not included.

By default, this is set to true.

Example: Disable a subscription

Set-CASplunkEventSubscription -Connection $connection -SubscriptionId $SubscriptionId -Enabled $false

Example: Edit the subsystems included in a webhook subscription

$newSubsystems = Get-CAEventExportSubsystems -Connection $connection | ? { $_.DisplayName -eq "File System" -or $_.DisplayName -eq "Active Directory" }

Set-CASplunkEventSubscription -Connection $connection -SubscriptionId cd87b774-8e65-46e1-8520-da478c60c4c3 -Subsystems $newSubsystems

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