More information on each of these topics can be found in this section. A tag already exists with the provided branch name. This repository has been archived by the owner on Apr 16, 2021. Default pillar file: This is the pillar file located under /opt/so/saltstack/default/pillar/. You can see that we have an alert with the IP addresses we specified and the TCP ports we specified. Security Onion Peel Back the Layers of Your Enterprise Monday, January 26, 2009 Integrating Snort 3.0 (SnortSP) and Sguil in 3 Steps So once you have Snort 3.0 installed, what can you do with it? At the end of this example IPs in the analyst host group, will be able to connect to 80, 443 and 8086 on our standalone node. This first sub-section will discuss network firewalls outside of Security Onion. 2GB RAM will provide decent performance for the Sguil client and retrieving packet captures from the server but also enough to run Security Onion in standalone mode for monitoring the local client and testing packet captures with tools like tcpreplay, In the image below, we can see how we define some rules for an eval node. For example, if you dont care that users are accessing Facebook, then you can silence the policy-based signatures for Facebook access. Previously, in the case of an exception, the code would just pass. Fresh install of Security Onion 16.04.6.3 ISO to hardware: Two NICs, one facing management network, one monitoring mirrored port for test network Setup for Production Mode, pretty much all defaults, suricata create alert rules for /etc/nsm/local.rules and run rule-update Log into scapy/msf on kalibox, send a few suspicious packets Escalate local privileges to root level. The signature id (SID) must be unique. Host groups are similar to port groups but for storing lists of hosts that will be allowed to connect to the associated port groups. This was implemented to avoid some issues that we have seen regarding Salt states that used the ip_interfaces grain to grab the management interface IP. If you right click on the, You can learn more about snort and writing snort signatures from the. To enable the ET Pro ruleset in an already installed grid, modify the /opt/so/saltstack/local/pillar/minions/ file as follows: Since Shared Object rules wont work with Suricata, you may want to disable them using a regex like 're:soid [0-9]+' as described in the Managing Alerts section. The second only needs the $ character escaped to prevent bash from treating that as a variable. These non-manager nodes are referred to as salt minions. Started by Doug Burks, and first released in 2009, Security Onion has. According to NIST, which step in the digital forensics process involves drawing conclusions from data? You may want to bump the SID into the 90,000,000 range and set the revision to 1. Finally, run so-strelka-restart to allow Strelka to pull in the new rules. This is located at /opt/so/saltstack/local/pillar/minions/.sls. Local pillar file: This is the pillar file under /opt/so/saltstack/local/pillar/. There may be entire categories of rules that you want to disable first and then look at the remaining enabled rules to see if there are individual rules that can be disabled. Download Security Onion 20110116. For example: If you need to modify a part of a rule that contains a special character, such as a $ in variable names, the special character needs to be escaped in the search part of the modify string. Copyright 2023 Cannot retrieve contributors at this time. From https://docs.saltstack.com/en/latest/: Salt is a core component of Security Onion 2 as it manages all processes on all nodes. Our products include both the Security Onion software and specialized hardware appliances that are built and tested to run Security Onion. Though each engine uses its own severity level system, Security Onion converts that to a standardized alert severity: event.severity: 4 ==> event.severity_label: critical, event.severity: 3 ==> event.severity_label: high, event.severity: 2 ==> event.severity_label: medium, event.severity: 1 ==> event.severity_label: low. In the configuration window, select the relevant form of Syslog - here, it's Syslog JSON - and click. After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. > To unsubscribe from this topic . Please note! The format of the pillar file can be seen below, as well as in /opt/so/saltstack/default/pillar/thresholding/pillar.usage and /opt/so/saltstack/default/pillar/thresholding/pillar.example. These policy types can be found in /etc/nsm/rules/downloaded.rules. However, the exception is now logged. A node that has a port group and host group association assigned to it will allow those hosts to connect to those ports on that node. Manager of Support and Professional Services. Generate some traffic to trigger the alert. lawson cedars. Security Onion is a free and open-source Linux distribution prepared for intrusion detection, security monitoring, and log management with the assistance of security tools namely Snort,. In many of the use cases below, we are providing the ability to modify a configuration file by editing either the global or minion pillar file. For example, if ips_policy was set to security, you would add the following to each rule: The whole rule would then look something like: alert tcp any any -> $HOME_NET 7789 (msg: "Vote for Security Onion Toolsmith Tool of 2011! /opt/so/saltstack/local/salt/firewall/assigned_hostgroups.local.map.yaml is where host group and port group associations would be made to create custom host group and port group assignements that would apply to all nodes of a certain role type in the grid. Revision 39f7be52. There are three alerting engines within Security Onion: Suricata, Wazuh and Playbook (Sigma). For example, if you include a bad custom snort rule with incorrect syntax, the snort engine will fail . A new version of our securityonion-rule-update package is now available that distributes OSSEC's local_rules.xml from master server to slave sensors by default and also allows for NIDS/HIDS rule tuning per physical sensor. Security Onion Solutions, LLC is the creator and maintainer of Security Onion, a free and open platform for threat hunting, network security monitoring, and log management. In this step we are redefining the nginx port group, so be sure to include the default ports as well if you want to keep them: Associate this port group redefinition to a node. Home About Us Bill Pay 877-213-8180 Product Library My accountItems of interest (0) Get your campus card Your campus card allows you to borrow books from the Library, use services at the student centre, make payments at Macquarie University retail outlets, and identify yourself during class tests and . /opt/so/saltstack/local/salt/firewall/portgroups.local.yaml defines custom port groups. In syslog-ng, the following configuration forwards all local logs to Security Onion. To verify the Snort version, type in snort -Vand hit Enter. It incorporates NetworkMiner, CyberChef, Squert, Sguil, Wazuh, Bro, Suricata, Snort, Kibana, Logstash, Elasticsearch, and numerous other security onion tools. /opt/so/saltstack/default/salt/firewall/portgroups.yaml, /opt/so/saltstack/default/salt/firewall/hostgroups.yaml, /opt/so/saltstack/default/salt/firewall/assigned_hostgroups.map.yaml, /opt/so/saltstack/local/salt/firewall/portgroups.local.yaml, /opt/so/saltstack/local/salt/firewall/hostgroups.local.yaml, /opt/so/saltstack/local/salt/firewall/assigned_hostgroups.local.map.yaml, /opt/so/saltstack/local/pillar/minions/_.sls, Allow hosts to send syslog to a sensor node, raw.githubusercontent.com (Security Onion public key), sigs.securityonion.net (Signature files for Security Onion containers), rules.emergingthreatspro.com (Emerging Threats IDS rules), rules.emergingthreats.net (Emerging Threats IDS open rules), github.com (Strelka and Sigma rules updates), geoip.elastic.co (GeoIP updates for Elasticsearch), storage.googleapis.com (GeoIP updates for Elasticsearch), download.docker.com (Docker packages - Ubuntu only), repo.saltstack.com (Salt packages - Ubuntu only), packages.wazuh.com (Wazuh packages - Ubuntu only), 3142 (Apt-cacher-ng) (if manager proxy enabled, this is repocache.securityonion.net as mentioned above), Create a new host group that will contain the IPs of the hosts that you want to allow to connect to the sensor. the rule is missing a little syntax, maybe try: alert icmp any any -> $HOME_NET any (msg:"ICMP Testing"; sid:1000001; rev:1;). Security Onion Layers Ubuntu based OS Snort, Suricata Snorby Bro Sguil Squert Ingest. You can add Wazuh HIDS rules in /opt/so/rules/hids/local_rules.xml. You can add NIDS rules in /opt/so/saltstack/local/salt/idstools/local.rules on your manager. and dont forget that the end is a semicolon and not a colon. jq; so-allow; so-elastic-auth; so . The territories controlled by the ROC consist of 168 islands, with a combined area of 36,193 square . You can then run curl http://testmynids.org/uid/index.html on the node to generate traffic which should cause this rule to alert (and the original rule that it was copied from, if it is enabled). If you cant run so-rule, you can modify the configuration manually in the manager pillar file at /opt/so/saltstack/local/pillar/minions/_.sls (where is manager, managersearch, standalone, or eval depending on the manager type that was chosen during install). Security Onion is a free and open platform for threat hunting, enterprise security monitoring, and log management. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. However, generating custom traffic to test the alert can sometimes be a challenge. Give feedback. Salt sls files are in YAML format. Firewall Requirements Salt minions must be able to connect to the manager node on ports 4505/tcp and 4506/tcp: Adding local rules in Security Onion is a rather straightforward process. Then tune your IDS rulesets. ET Open optimized for Suricata, but available for Snort as well free For more information, see: https://rules.emergingthreats.net/open/ ET Pro (Proofpoint) optimized for Suricata, but available for Snort as well rules retrievable as released /opt/so/saltstack/default/salt/firewall/hostgroups.yaml is where the default hostgroups are defined. Copyright 2023 Revision 39f7be52. All alerts are viewable in Alerts, Dashboards, Hunt, and Kibana. Generate some traffic to trigger the alert. The firewall state is designed with the idea of creating port groups and host groups, each with their own alias or name, and associating the two in order to create an allow rule. Adding Local Rules Security Onion 2.3 documentation Docs Tuning Adding Local Rules Edit on GitHub Adding Local Rules NIDS You can add NIDS rules in /opt/so/saltstack/local/salt/idstools/local.rules on your manager. Logs. For more information, please see https://docs.saltproject.io/en/latest/topics/troubleshooting/yaml_idiosyncrasies.html. If you pivot from that alert to the corresponding pcap you can verify the payload we sent. I've just updated the documentation to be clearer. idstools may seem like it is ignoring your disabled rules request if you try to disable a rule that has flowbits set. Default YARA rules are provided from Florian Roths signature-base Github repo at https://github.com/Neo23x0/signature-base. Here are some of the items that can be customized with pillar settings: Currently, the salt-minion service startup is delayed by 30 seconds. You can read more about this at https://redmine.openinfosecfoundation.org/issues/4377. Hi @Trash-P4nda , I've just updated the documentation to be clearer. All node types are added to the minion host group to allow Salt communication. Security Onion is an open source suite of network security monitoring (NSM) tools for evaluating alerts, providing three core functions to the cybersecurity analyst: Full packet capture and data types Network-based and host-based intrusion detection systems Alert analysis tools Run rule-update (this will merge local.rules into downloaded.rules, update. You could try testing a rule . Try checking /var/log/nsm/hostname-interface/snortu-1.log for clues and please post the exact rule syntax you are attempting to use. Modifying these values outside of so-allow or so-firewall could lead to problems accessing your existing hosts. To enabled them, either revert the policy by remarking the ips_policy line (and run rule-update), or add the policy type to the rules in local.rules. Have you tried something like this, in case you are not getting traffic to $HOME_NET? I have had issues with Sguil when working with a snapshot and have not found a fix yet.. On Monday, June 26, 2017 at 8:28:44 PM UTC+5:30, KennyWap wrote: security-onion+unsubscribe@googlegroups.com, https://groups.google.com/group/security-onion. Double-click the Setup script on the Desktop and follow the prompts to configure and start the Sguil processes. If you need to increase this delay, it can be done using the salt:minion:service_start_delay pillar. Edit the /opt/so/rules/nids/local.rules file using vi or your favorite text editor: Paste the rule. We can start by listing any rules that are currently modified: Lets first check the syntax for the add option: Now that we understand the syntax, lets add our modification: Once the command completes, we can verify that our modification has been added: Finally, we can check the modified rule in /opt/so/rules/nids/all.rules: To include an escaped $ character in the regex pattern youll need to make sure its properly escaped.