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. Within 15 minutes, Salt should then copy those rules into /opt/so/rules/nids/local.rules. 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. Tried as per your syntax, but still issue persists. The durian (/ d r i n /, / dj r i n /) is the edible fruit of several tree species belonging to the genus Durio.There are 30 recognised Durio species, at least nine of which produce edible fruit. Add the following to the sensor minion pillar file located at. To configure syslog for Security Onion: Stop the Security Onion service. Backing up current local_rules.xml file. For example, suppose we want to disable SID 2100498. /opt/so/saltstack/local/salt/idstools/local.rules, "GPL ATTACK_RESPONSE id check returned root 2", /opt/so/saltstack/local/salt/strelka/rules, /opt/so/saltstack/local/salt/strelka/rules/localrules, /opt/so/saltstack/local/salt/strelka/rules/, https://github.com/Neo23x0/signature-base. Interested in discussing how our products and services can help your organization? All the following will need to be run from the manager. Revision 39f7be52. Security Onion Layers Ubuntu based OS Snort, Suricata Snorby Bro Sguil Squert Please provide the output of sostat-redacted, attaching as a plain text file, or by using a service like Pastebin.com. After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. The signature id (SID) must be unique. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. Copyright 2023 You can do so via the command line using curl: Alternatively, you could also test for additional hits with a utility called tmNIDS, running the tool in interactive mode: If everything is working correctly, you should see a corresponding alert (GPL ATTACK_RESPONSE id check returned root) in Alerts, Dashboards, Hunt, or Kibana. Security Onion. 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. This will add the IPs to the host group in, Since we reused the syslog port group that is already defined, we dont need to create a new port group. In a distributed deployment, the manager node controls all other nodes via salt. On Thursday, June 15, 2017 at 5:06:51 PM UTC+5:30, Wes wrote: Is it simply not triggering, or causing an error? 137 vi local.rules 138 sudo vi local.rules 139 vi cd .. 140 cd .. 141 vi securityonion.conf 142 sudo vi pulledpork/pulledpork.conf 143 sudo rule-update 144 history 145 vi rules/downloaded.rules 146 sudo vi local.rules 147 sudo vi rules/local.rules 160 sudo passwd david 161 sudo visudo 162 sudo vi rules/local.rules In the image below, we can see how we define some rules for an eval node. This error now occurs in the log due to a change in the exception handling within Salts event module. 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. These non-manager nodes are referred to as salt minions. Local pillar file: This is the pillar file under /opt/so/saltstack/local/pillar/. Copyright 2023 Custom rules can be added to the local.rules file Rule threshold entries can . lawson cedars. 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. For example, if you include a bad custom snort rule with incorrect syntax, the snort engine will fail . (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. 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. Security Onion offers the following choices for rulesets to be used by Suricata. /opt/so/saltstack/local/salt/firewall/portgroups.local.yaml defines custom port groups. We created and maintain Security Onion, so we know it better than anybody else. At those times, it can be useful to query the database from the commandline. 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) This is located at /opt/so/saltstack/local/pillar/minions/.sls. so-rule allows you to disable, enable, or modify NIDS rules. Between Zeek logs, alert data from Suricata, and full packet capture from Stenographer, you have enough information to begin identifying areas of interest and making positive changes to your security stance. Its important to note that with this functionality, care should be given to the suppressions being written to make sure they do not suppress legitimate alerts. > > => I do not know how to do your guilde line. . https://securityonion.net/docs/AddingLocalRules. 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. This directory stores the firewall rules specific to your grid. 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. Default YARA rules are provided from Florian Roths signature-base Github repo at https://github.com/Neo23x0/signature-base. /opt/so/saltstack/default/salt/firewall/hostgroups.yaml is where the default hostgroups are defined. One thing you can do with it (and the one that most people are interested in) is to configure it for IDS mode. 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. This can be done in the minion pillar file if you want the delay for just that minion, or it can be done in the global.sls file if it should be applied to all minions. 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. There are multiple ways to handle overly productive signatures and well try to cover as many as we can without producing a full novel on the subject. You may want to bump the SID into the 90,000,000 range and set the revision to 1. Once your rules and alerts are under control, then check to see if you have packet loss. Finally, run so-strelka-restart to allow Strelka to pull in the new rules. See above for suppress examples. This directory contains the default firewall rules. This writeup contains a listing of important Security Onion files and directories. We've been teaching Security Onion classes and providing Professional Services since 2014. By default, only the analyst hostgroup is allowed access to the nginx ports. When you run so-allow or so-firewall, it modifies this file to include the IP provided in the proper hostgroup. This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. You can learn more about snort and writing snort signatures from the Snort Manual. . There are three alerting engines within Security Onion: Suricata, Wazuh and Playbook (Sigma). If you are on a large network, you may need to do additional tuning like pinning processes to CPU cores. You can add Wazuh HIDS rules in /opt/so/rules/hids/local_rules.xml. 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. You can see that we have an alert with the IP addresses we specified and the TCP ports we specified. Logs. Salt can be used for data-driven orchestration, remote execution for any infrastructure, configuration management for any app stack, and much more. Security Onion offers the following choices for rulesets to be used by Snort/Suricata: 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 ELSA? Security Onion is a platform that allows you to monitor your network for security alerts. 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. PFA local.rules. 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. Security Onion uses idstools to download new signatures every night and process them against a set list of user generated configurations. To unsubscribe from this group and stop receiving emails from it, send an email to security-onio.@googlegroups.com. Started by Doug Burks, and first released in 2009, Security Onion has. This first sub-section will discuss network firewalls outside of Security Onion. 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. More information on each of these topics can be found in this section. Introduction Adding local rules in Security Onion is a rather straightforward process. Security Onion is a free and open platform for threat hunting, enterprise security monitoring, and log management. Generate some traffic to trigger the alert. For a Security Onion client, you should dedicate at least 2GB RAM, but ideally 4GB if possible. Naming convention: The collection of server processes has a server name separate from the hostname of the box. Here are some of the items that can be customized with pillar settings: Currently, the salt-minion service startup is delayed by 30 seconds. Revision 39f7be52. Copyright 2023 In 2008, Doug Burks started working on Security Onion, a Linux distribution for intrusion detection, network security monitoring, and log management. Firewall Requirements Salt minions must be able to connect to the manager node on ports 4505/tcp and 4506/tcp: "; reference: url,http://holisticinfosec.blogspot.com/2011/12/choose-2011-toolsmith-tool-of-year.html; content: "toolsmith"; flow:to_server; nocase; sid:9000547; metadata:policy security-ips; rev:1). 5. To add local YARA rules, create a directory in /opt/so/saltstack/local/salt/strelka/rules, for example localrules. After viewing your redacted sostat it seems that the ICMP and UDP rules are triggering: Are you using SO with in a VM? 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 /opt/so/saltstack/default/salt/firewall/portgroups.yaml is where the default port groups are defined. After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. 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. 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. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. 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 this file, the idstools section has a modify sub-section where you can add your modifications. Previously, in the case of an exception, the code would just pass. jq; so-allow; so-elastic-auth; so . And when I check, there are no rules there. Check your syslog-ng configuration for the name of the local log source ("src" is used on SUSE systems). https://docs.securityonion.net/en/2.3/local-rules.html?#id1. If so, then tune the number of AF-PACKET workers for sniffing processes. Network Security Monitoring, as a practice, is not a solution you can plug into your network, make sure you see blinking lights and tell people you are secure. It requires active intervention from an analyst to qualify the quantity of information presented. All node types are added to the minion host group to allow Salt communication. 1. 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,. Our documentation has moved to https://securityonion.net/docs/. Ingest. Managing Rules; Adding Local Rules; Managing Alerts; High Performance Tuning; Tricks and Tips. For some alerts, your understanding of your own network and the business being transacted across it will be the deciding factor. If you pivot from that alert to the corresponding pcap you can verify the payload we sent. Assuming you have Internet access, Security Onion will automatically update your NIDS rules on a daily basis. However, generating custom traffic to test the alert can sometimes be a challenge. Security. Some node types get their IP assigned to multiple host groups. 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). However, generating custom traffic to test the alert can sometimes be a challenge. You can read more about this at https://redmine.openinfosecfoundation.org/issues/4377. Backing up current downloaded.rules file before it gets overwritten. It . Revision 39f7be52. How are they parsed? 7.2. This repository has been archived by the owner on Apr 16, 2021. How are they stored? Of course, the target IP address will most likely be different in your environment: destination d_tcp { tcp("192.168.3.136" port(514)); }; log { Adding local rules in Security Onion is a rather straightforward process. Download Security Onion 20110116. Use one of the following examples in your console/terminal window: sudo nano local.rules sudo vim local.rules. From the Command Line. When configuring network firewalls for distributed deployments, youll want to ensure that nodes can connect as shown below. When setup is run on a new node, it will SSH to the manager using the soremote account and add itself to the appropriate host groups. Also ensure you run rule-update on the machine. Now that we have a signature that will generate alerts a little more selectively, we need to disable the original signature. If we want to allow a host or group of hosts to send syslog to a sensor, then we can do the following: In this example, we will be extending the default nginx port group to include port 8086 for a standalone node.
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