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Add session metadata (Beta)

This functionality is in beta and is subject to change. The design and code is less mature than official GA features and is being provided as-is with no warranties. Beta features are not subject to the support SLA of official GA features.

The add_session_metadata processor enriches process events with additional information that users can see using the Session View tool in the Elastic Security platform.

The current release of add_session_metadata processor for Auditbeat is limited to virtual machines (VMs) and bare metal environments.

Here’s an example using the add_session_metadata processor to enhance process events generated by the auditd module of Auditbeat.

auditbeat.modules:
- module: auditd
  processors:
    - add_session_metadata:
       backend: "auto"

How the `add_session_metadata` processor works

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Using the available Linux kernel technology, the processor collects comprehensive information on all running system processes, compiling this data into a process database. When processing an event (such as those generated by the Auditbeat auditd module), the processor queries this database to retrieve information about related processes, including the parent process, session leader, process group leader, and entry leader. It then enriches the original event with this metadata, providing a more complete picture of process relationships and system activities.

This enhanced data enables the powerful Session View tool in the Elastic Security platform, offering users deeper insights for analysis and investigation.

Backends

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The add_session_metadata processor operates using various backend options.

auto is the recommended setting. It attempts to use ebpf first, falling back to procfs if necessary, ensuring compatibility even on systems without ebpf support.
ebpf collects process information with eBPF. This backend requires a system with Linux kernel 5.10.16 or above, kernel support for eBPF enabled, and auditbeat running as superuser.
procfs collects process information with the proc filesystem. This is compatible with older systems that may not support ebpf. To gather complete process info, auditbeat requires permissions to read all process data in procfs; for example, run as a superuser or have the SYS_PTRACE capability.

Containers

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If you are running Auditbeat in a container, the container must run in the host’s PID namespace. With the auto or ebpf backend, these host directories must also be mounted to the same path within the container: /sys/kernel/debug, /sys/fs/bpf.

Enable and configure Session View in Auditbeat

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To configure and enable Session View functionality, you’ll:

Add the add_sessions_metadata processor to your auditbeat.yml file.
Configure audit rules in your auditbeat.yml file.
Restart Auditbeat.

We’ll walk you through these steps in more detail.

Edit your auditbeat.yml file and add this info to the modules configuration section:

auditbeat.modules:
- module: auditd
  processors:
    - add_session_metadata:
       backend: "auto"

Add audit rules in the modules configuration section of auditbeat.yml or the audit.rules.d config file, depending on your configuration:

auditbeat.modules:
- module: auditd
  audit_rules: |
    ## executions
    -a always,exit -F arch=b64 -S execve,execveat -k exec
    -a always,exit -F arch=b64 -S exit_group
    ## set_sid
    -a always,exit -F arch=b64 -S setsid

Save your configuration changes.
Restart Auditbeat:
```
sudo systemctl restart auditbeat
```

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Add session metadata (Beta)