4.3. Cases and Log Processing

The Cases section gives a good overview regarding the existing cases and also provides various filtering options. Column visibility can be configured by clicking on the Columns button of this section.

The Cases Section is split into the different sources of your Cases:

THOR Cases
Aurora Cases

Additionally, you can find more information regarding:

Grouping Criteria
Case Changes
Security Center

When a case is created, the state will be "Open" and the type will be set to "Noteworthy" by default.

The following states can be set (by default):

Open
Level 1 Finished
Level 1 Working
Level 2 Working
Closed

It is possible to configure custom states.

The following types can be set:

Incident
Suspicious
Vulnerability
Noteworthy
Unknown
Legitimate Anomaly
False Positive

See chapter Glossary for a detailed description of these terms.

Within a case, it is possible to add various information, write a summary, provide canned recommendations or add assessment information.

The log lines contained in the case can of course be analyzed in detail and changes to the case are tracked automatically.

The cockpit will automatically calculate rules (auto_case_id), that make sure, future incoming logs that are similar to the log lines in this particular case are automatically assigned to this case and will not show up in the Baselining section.

Important

Automatically assign newly incoming events to this case needs to be selected during case creation to automatically assign new events to an existing case.

In order to understand this better, let's assume you have decided a group of logs are legitimate anomalies. Then all future logs that are similar to these anomalies will automatically be added to this case and not show up in the Baselining section.

In case you have decided a group of log lines represent a security incident, the same thing will happen. Future log lines that represent a security incident will show up only in the case and not in the Baselining section.

Most organizations want to be alerted in case of a security incident. The Cockpit can be configured to forward all logs that are automatically assigned to an incident case to the organizations' SIEM System via syslog. Organizations that prefer to handle THOR Events entirely within the Analysis Cockpit and not forward anything to a SIEM system may choose to configure a notification that shows up in the Cockpit's Notification Section.

The following picture shows the recommended log processing.

As one can see, an incoming log line only shows up in the Baselining section when it matches no existing case.

This behavior is highly configurable and can be changed in the Settings section of the Analysis Cockpit. One can even decide not to forward anything to a SIEM System or may decide to also forward suspicious elements in addition.

In other Words:

Cases represent the means of setting and maintaining the log baseline within the Cockpit. When you scan your infrastructure once, assign all logs to cases and then scan it for the second time, the Baselining section should be empty if nothing has changed. All incoming logs should be similar to the ones in the first scan and therefore be assigned to the respective cases and not show up in the Baselining section.

Working with cases is explained in detail in the sections below.

4.3.1. Case Templates

Case Templates can be used to suggest new cases in the Suggested Cases section. If there are no Suggested Cases in the view, no events match the Case Templates in your Analysis Cockpit.

To import new Case Templates, you need to create a .yaml file with the conditions first. This can be done by navigating to the Cases view and exporting your search results as Case Templates. You will be able to download a .yaml file from here, which can be used to import as a Case Template.

Export Case Template — Exporting Search Results as Case Templates

Exported Case Template

uuid: 94565b82-45fc-47f8-82eb-e9c5352c37c2
name: Thor started on a system with the wrong processor architecture
summary: ""
type: 5
scanner: THOR
creator: admin
condition: "\"MODULE: Startup\" AND \"MESSAGE: 32 bit THOR was executed on 64 bit
  system. For improved results, use the 64 bit version of THOR.\"\r\n"

After you downloaded the Case Templates, you can import them in the Case Templates view.

You can now inspect the Case Template. You can find it by either looking for the name or filter by who created it. You can see that the conditions match the contents of your exported Case Template (.yaml file).