Monday, May 4, 2020

Security Onion ISO image now available featuring Zeek 3.0.5, Suricata 4.1.8, Elastic 6.8.8, CyberChef 9.20.3, and more!

Our Security Onion ISO image is now available!

Security Onion boot menu

Major Changes Since Last ISO Image

  • Zeek 3.0.5
  • Suricata 4.1.8
  • Elastic 6.8.8
  • CyberChef 9.20.3

Thanks to Wes Lambert for testing this ISO image!

Package Updates
This release also includes the following updated packages:
securityonion-web-page - 20141015-0ubuntu0securityonion107
pinguybuilder - 20180514-1ubuntu1securityonion23

These packages resolve the following issues:

Docs: add warnings and notes #1744

Update docs and cheat sheet for #1758

CyberChef 9.20.3 #1747

pinguybuilder: increment version to #1748

Issues Resolved
For a list of all issues resolved in this release, please see:

Release Notes
For more information about this release, please see:

Installation Guide
We've updated the Installation guide to reflect the download locations for the new ISO image:

Existing Deployments
If you have existing 16.04 installations, there is no need to download the new ISO image.  You can simply continue using our standard update process to install updated packages as they are made available:

If you have existing installations of Security Onion 14.04, you can upgrade from 14.04 to 16.04:

You can find our documentation here:

Also, we're now offering a printed copy of our official documentation with foreword by Richard Bejtlich and proceeds going to Rural Technology Fund:

Need support?  Please see:

Security Onion Solutions is the only official authorized training provider for Security Onion:

We now offer hardware appliances!  For more information, please see:

Screenshot Tour
ISO boot menu 
Once the Live Desktop appears, double-click the Install icon and follow the prompts

Once you've completed the installer and rebooted, login using the username and password you created in the installer

After logging in, you are prompted to run Setup

Setup can now run interactively via CLI and sosetup-minimal can be used to minimize RAM and CPU usage

Welcome to Setup

Configure network interfaces

If your hostname is securityonion, Setup gives you the opportunity to rename it

Configure your network interfaces, reboot, then log back in

Launch Setup again and skip network configuration to go to service configuration

sosetup-minimal can run Evaluation Mode in 4GB RAM

Confirm sniffing interface

Create username
Create Password

Confirm Password

Confirm all options

Setup complete

Desktop no longer prompts to run Setup and includes icons for analyst applications 
The README shortcut includes links to the cheat sheet and online and offline documentation

CyberChef 9.20.3

Single Sign On (SSO) for Squert, CapMe, and Kibana
sosetup-minimal can run Evaluation Mode in only 4GB RAM

Analyze IDS alerts using Squert

Retrieve full packet capture with CapMe

Kibana Overview Dashboard


Zeek Notices

HIDS Alerts from OSSEC/Wazuh

NIDS Alerts from Snort or Suricata
Zeek Connections

Zeek Total Bytes


Zeek DNP3

Zeek DNS

Zeek Files

Zeek FTP


Zeek Intel

Zeek IRC

Zeek Modbus

Zeek MySQL


Zeek PE

Zeek RDP

Zeek RFB

Zeek SIP

Zeek SMB



Zeek Software

Zeek SSH

Zeek SSL

Zeek Syslog

Zeek Tunnels

Zeek Weird

Zeek X.509

OSSEC/Wazuh Logs

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