Sentinel POC- Architecture and Recommendations For MSSPs (Part 3)

By Ashwin Venugopal -

 





To read part 1, please click here
To read part 2, please click here
To read part 4, please click here
To read part 5, please click here






Migrations

Currently, MSSPs on POC needs to migrate from the legacy SIEM in use and generally, the main concern is to convert the existing rule into Sentinel KOL. However, the focus should be on data sources because many of the connectors are available as Content hub solutions, which  means that the connector will also have other artifacts like analytic rules, workbooks, playbooks, etc. Over 250 solutions are there in the marketplace and once it is determined which data sources needed to be covered during the POC. After that, the rules will be mapped within the SIEM legacy to the rules provided within the solution. 

Partners may end up with some gaps, but, not all the rules will have to be converted. Some repositories like unified Microsoft Sentinel and Microsoft 365 Defender repository, also have many artifacts available. Some tools also offers free Sigma rule translations, such as SOC Prime's Uncoder I.O. Also, partners going through the POC may sometimes come up with their own solutions that can be published to the marketplace.

Which Connectors?

The types of connectors required to be configured and tested during during a Sentinel POC depends on what compliance regulations or internal security requirements or internal priorities the partners must comply with. 

There are various data ingestion methods for Microsoft Sentinel. Some of the connectors like syslog and CEF can also support a variety of data sources. It is just a matter of time in figuring out the right method of ingesting a data source. There is also a Zero Trust solution in Content hub having some recommended data connectors, and it sorts them from Foundational, to Basic, to Intermediate, to Advanced.

Considerations:

  • Free data- Some data is always free.

  • Microsoft Sentinel benefit for Microsoft 365 E5, A5, F5, and G5 customers- Customers currently paying for those licenses can receive "a data grant of up to 5MB per user/day to ingest Microsoft 365 data." 

  • Ingestion time transformation- Many tables support ingestion time transformation as another way to reduce cost. Partners can use ingestion time transformations to filter out data that is not useful for security analysis. There is also a library of transformations available and these transformations can also be used to mask data.

  • Commitment tiers- Previously known as Capacity Reservations, is another way to reduce costs, as much as 65% compared to pay-as-you-go.






To read part 1, please click here
To read part 2, please click here
To read part 4, please click here
To read part 5, please click here












































Comments

Post a Comment

Popular posts from this blog

Query, Visualize, & Monitor Data in Azure Sentinel

By Ashwin Venugopal -
Image
  Azure Sentinel Workbooks Several ready for use templates are provided by the Azure Sentinel that can be used to create your own workbook and then modify them as needed for Contoso. Most of the data connectors it uses to ingest data come with their own workbooks, but better insight can be obtained by simply looking into the data that is being ingested by using tables and visualizations, including bar and pie charts. You can also make your own workbook easily by using this data from the beginning instead of using the predefined templates. Workbook Page You can easily access the workbook page from the Azure Sentinel from the navigation pane which consists of the: Workbook header- You can add a new workbook and review the saved workbooks as well as templates that are available on the workbook page. Templates section- You can access existing workbook templates on the Templates tab. You can save some of the workbooks for quick access and they will appear on the My Workbooks tab.  From the
Read more

Planning for Implementing SAP Solutions on Azure (Part 2 of 5)

By Ashwin Venugopal -
Image
  To read part 1 please click  here To read part 3 please click  here To read part 4 please click  here To read part 5 please click  here Load Balancing The load balancer uses probe ports to determine as well as route the traffic to an active DBMS node, but of there's any failover then the most common SAP application architecture can automatically reconnect against the private virtual IP address without the need for the SAP application to reconfigure it, while the load balancer redirect the traffic against the private virtual IP address without any need for the SAP application to reconfigure. The loaf balancer also offers an option of DirectServerReturn which if configured, can help in directing the traffic from the DBMS VM to the SAP application layer directly to the application layer without routing through the load balancer. But, if it isn't configured, then the return traffic to the SAP application layer is routed through the load balancer. You can also use Azure Load Balan
Read more

Work with String Data Using KQL Statements

By Ashwin Venugopal -
Image
  Extract Data from Unstructured String Fields Unstructured string fields often contains the Security log data and requires parsing to extract data. There are multiple ways of pulling information from string fields in KQL and the two primary operators used are extract and parse.  Extract It gets a match for a regular expression from a text string. You can convert the extracted substring to the indicated type.  Arguments regex- A regular expression. captureGroup- A positive int constant indicating the capture group to extract. 0 stands for the entire match, 1 for the value matched by the first '('parenthesis')' in the regular expression, 2 or more for subsequent parenthesis.  text- A string to search. typeLiteral- An optional type literal. If provided, the extracted substring is converted to this type.  Returns If regex finds a match in text- the substring matched against the indicated capture group captureGroup, optionally converted to typeLiteral. If there's no mat
Read more