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Change Auditor 7.3 - 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 Managing a Microsoft Sentinel integration
Webhook technical insights

Get-CASyslogEventSubscriptions

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

-Connection

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

-SubscriptionId (optional)

The ID of an existing Syslog subscription.

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

Get-CASyslogEventSubscriptions -Connection $connection

Command output

The command returns the following information.

Id

The subscription ID.

WebhookSubscriptionId

The webhook subscription ID.

Host

The IP address or host name where event data is sent.

Port

The port where event data is sent.

StartTimeUTC

Starting point in time for events being sent.

Subsystems

Subsystems that contain the event data being sent.

Enabled

Whether the subscription is enabled.

HeartbeatUrl

URL for heartbeat notifications.

LastEventTimeUTC

When the last event was sent.

LastEventResponse

Last event response.

LastHeartbeatTimeUTC

When the last heartbeat was sent.

LastHeartbeatResponse

The 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 how often (in milliseconds) notifications are sent.

HeartbeatInterval

How often (in milliseconds) heartbeat notifications are sent.

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.

TIsEnabled

Specifies whether TLS encryption is enabled.

SyslogFormat

Specifies the message format (LEEF or CEF).

Set-CASyslogEventSubscription

Use this command to modify a Syslog subscription.

Table 2. Available parameters

-Connection

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

-Host (Optional)

Specifies the IP address or host name of the computer where the Syslog server is installed.

-Port (Optional)

The the port number for the Syslog server.

-TIsEnabled (Optional)

Specifies whether TLS encryption is enabled.

-SyslogFormat (Optional)

Specifies the message format (LEEF or CEF).

-Subscription

The PSCASyslogEventSubscriptionStatus object that corresponds to the subscription to modify. This parameter is required if the SubscriptionId parameter is not specified.

-SubscriptionId

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

-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.

-NotificationInterval (Optional)

Specifies how often (in milliseconds) notifications are sent to the computer where the Syslog server is installed. 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-CASyslogEventSubscription -Connection $connection -SubscriptionId $SubscriptionId -Enabled $false

Example: Edit the subsystems included in a subscription

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

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

Remove-CASyslogEventSubscription

Use this command to remove a subscription.

-Connection

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

-Subscription

The PSCASyslogEventSubscriptionStatus object that corresponds to the subscription to remove. This parameter is required if the SubscriptionId parameter is not specified.

-SubscriptionId

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

Remove-CASyslogEventSubscription -Connection $connection -SubscriptionId $subscriptionId

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Managing a Microsoft Sentinel integration

To send the rich events gathered by Change Auditor to Microsoft Sentinel, you need to create an event subscription with Change Auditor. The subscription contains information about where to send the notifications and heartbeats and the event subsystems to include.

The following Azure Log Analytics KQL query example, returns a list of servers missing heartbeats in the last 10 minutes where the servers have been active at some point in the last 24 hours.

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