This directory stores the firewall rules specific to your grid. Taiwan, officially the Republic of China (ROC), is a country in East Asia.It is located at the junction of the East and South China Seas in the northwestern Pacific Ocean, with the People's Republic of China (PRC) to the northwest, Japan to the northeast, and the Philippines to the south. Run so-rule without any options to see the help output: We can use so-rule to modify an existing NIDS rule. According to NIST, which step in the digital forensics process involves drawing conclusions from data? If you built the rule correctly, then snort should be back up and running. If you have Internet access and want to have so-yara-update pull YARA rules from a remote Github repo, copy /opt/so/saltstack/local/salt/strelka/rules/, and modify repos.txt to include the repo URL (one per line). You can see that we have an alert with the IP addresses we specified and the TCP ports we specified. There are many ways to achieve age regression, but the three primary methods are: Botox. (Archived 1/22) Tuning NIDS Rules in Security Onion Security Onion 7.5K subscribers 48 Dislike Share 1,465 views Dec 22, 2021 This video has been archived as of January 2022 - the latest. I have 3 simple use cases (1) Detect FTP Connection to our public server 129.x.x.x (2) Detect SSH Connection attempts (3) Detect NMAP scan. Download Security Onion 20110116. If you previously added a host or network to your firewall configuration and now need to remove them, you can use so-firewall with the excludehost option. Tracking. The default allow rules for each node are defined by its role (manager, searchnode, sensor, heavynode, etc) in the grid. 41 - Network Segmentation, VLANs, and Subnets. 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 /opt/so/saltstack/local/salt/firewall/portgroups.local.yaml defines custom port groups. Give feedback. 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,. Generate some traffic to trigger the alert. In this file, the idstools section has a modify sub-section where you can add your modifications. Modifying these values outside of so-allow or so-firewall could lead to problems accessing your existing hosts. to security-onion When I run 'rule-update' it give an error that there are no rules in /usr/local/lib/snort_dynamicrules. For example: In some cases, you may not want to use the modify option above, but instead create a copy of the rule and disable the original. These non-manager nodes are referred to as salt minions. Global pillar file: This is the pillar file that can be used to make global pillar assignments to the nodes. 4. By default, only the analyst hostgroup is allowed access to the nginx ports. If you would like to pull in NIDS rules from a MISP instance, please see the MISP Rules section. c96 extractor. Any line beginning with "#" can be ignored as it is a comment. Please update your bookmarks. The reason I have a hub and not a switch is so that all traffic is forwarded to every device connected to it so security onion can see the traffic sent from the attacking kali linux machine, to the windows machines. For example, to check disk space on all nodes: If you want to force a node to do a full update of all salt states, you can run so-checkin. Within 15 minutes, Salt should then copy those rules into /opt/so/rules/nids/local.rules. /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. 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 Security Onion includes best-of-breed free and open tools including Suricata, Zeek, Wazuh, the Elastic Stack and many others. Check your syslog-ng configuration for the name of the local log source ("src" is used on SUSE systems). The set of processes includes sguild, mysql, and optionally the Elastic stack (Elasticsearch, Logstash, Kibana) and Curator. When you purchase products and services from us, you're helping to fund development of Security Onion! 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? sigs.securityonion.net (Signature files for Security Onion containers) ghcr.io (Container downloads) rules.emergingthreatspro.com (Emerging Threats IDS rules) rules.emergingthreats.net (Emerging Threats IDS open rules) www.snort.org (Paid Snort Talos ruleset) github.com (Strelka and Sigma rules updates) Open /etc/nsm/rules/local.rules using your favorite text editor. For example, if you had a web server you could include 80 and 443 tcp into an alias or in this case a port group. https://securityonion.net/docs/AddingLocalRules. Data collection Examination If you want to tune Wazuh HIDS alerts, please see the Wazuh section. Where is it that you cannot view them? . 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. The server is also responsible for ruleset management. For example, if you include a bad custom snort rule with incorrect syntax, the snort engine will fail . Also ensure you run rule-update on the machine. Then tune your IDS rulesets. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. Default YARA rules are provided from Florian Roths signature-base Github repo at https://github.com/Neo23x0/signature-base. Salt is a core component of Security Onion 2 as it manages all processes on all nodes. If . These non-manager nodes are referred to as salt minions. https://docs.securityonion.net/en/2.3/local-rules.html?#id1. to security-onion > > My rules is as follows: > > alert icmp any any -> (msg:"ICMP Testing"; sid:1000001; rev:1:) the rule is missing a little syntax, maybe try: alert icmp any any ->. Identification. Some node types get their IP assigned to multiple host groups. Run rule-update (this will merge local.rules into downloaded.rules, update. One thing you can do with it (and the one that most people are interested in) is to configure it for IDS mode. Copyright 2023 As shown above, we edit the minion pillar and add the SID to the idstools - sids - disabled section. However, generating custom traffic to test the alert can sometimes be a challenge. . The error can be ignored as it is not an indication of any issue with the minions. (Alternatively, you can press Ctrl+Alt+T to open a new shell.) If you need to increase this delay, it can be done using the salt:minion:service_start_delay pillar. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. These policy types can be found in /etc/nsm/rules/downloaded.rules. Revision 39f7be52. The easiest way to test that our NIDS is working as expected might be to simply access http://testmynids.org/uid/index.html from a machine that is being monitored by Security Onion. Please note that Suricata 6 has a 64-character limitation on the IP field in a threshold. This will execute salt-call state.highstate -l info which outputs to the terminal with the log level set to info so that you can see exactly whats happening: Many of the options that are configurable in Security Onion 2 are done via pillar assignments in either the global or minion pillar files. > > > > > > > > Cheers, Andi > > > > > > > > > > -- Mit besten Gren Shane Castle > > > > -- > Mit besten Gren > Shane Castle > > -- > You received this message because you are subscribed to a topic in the > Google Groups "security-onion" group. To unsubscribe from this group and stop receiving emails from it, send an email to. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. Started by Doug Burks, and first released in 2009, Security Onion has. On Thursday, June 15, 2017 at 5:06:51 PM UTC+5:30, Wes wrote: Is it simply not triggering, or causing an error? You are an adult, at least 18 years of age, you are familiar with and understand the standards and laws of your local community regarding sexually-oriented media. Security Onion offers the following choices for rulesets to be used by Suricata. Host groups are similar to port groups but for storing lists of hosts that will be allowed to connect to the associated port groups. Next, run so-yara-update to pull down the rules. 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. To generate traffic we are going to use the python library scapy to craft packets with specific information to ensure we trigger the alert with the information we want: Craft the layer 2 information. 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.