. As you can see I have the Security Onion machine connected within the internal network to a hub. Revision 39f7be52. /opt/so/saltstack/default/salt/firewall/hostgroups.yaml is where the default hostgroups are defined. First off, I'll briefly explain security onion security Onion is the leading open source operating system for network security monitoring, intrusion detection, log management and threat hunting. Please note if you are using a ruleset that enables an IPS policy in /etc/nsm/pulledpork/pulledpork.conf, your local rules will be disabled. 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. To configure syslog for Security Onion: Stop the Security Onion service. For example, if you include a bad custom snort rule with incorrect syntax, the snort engine will fail . Salt sls files are in YAML format. Manager of Support and Professional Services. Minion pillar file: This is the minion specific pillar file that contains pillar definitions for that node. These are the files that will need to be changed in order to customize nodes. Modifying these values outside of so-allow or so-firewall could lead to problems accessing your existing hosts. /opt/so/saltstack/default/salt/firewall/assigned_hostgroups.map.yaml is where the default allow rules come together and pair hostgroups and portgroups and assign that pairing to a node based on its role in the grid. You may want to bump the SID into the 90,000,000 range and set the revision to 1. 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 { It is now read-only. 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. Please note that Suricata 6 has a 64-character limitation on the IP field in a threshold. 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. Finally, from the manager, update the config on the remote node: You can manage threshold entries for Suricata using Salt pillars. Logs. For example, consider the following rules that reference the ET.MSSQL flowbit. The second only needs the $ character escaped to prevent bash from treating that as a variable. The set of processes includes sguild, mysql, and optionally the Elastic stack (Elasticsearch, Logstash, Kibana) and Curator. Please note! 7.2. Here are some of the items that can be customized with pillar settings: Currently, the salt-minion service startup is delayed by 30 seconds. 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/local/pillar/minions/, https://www.proofpoint.com/us/threat-insight/et-pro-ruleset, https://www.snort.org/downloads/#rule-downloads, https://www.snort.org/faq/what-are-community-rules, https://snort.org/documents/registered-vs-subscriber, license fee per sensor (users are responsible for purchasing enough licenses for their entire deployment), Snort SO (Shared Object) rules only work with Snort not, same rules as Snort Subscriber ruleset, except rules only retrievable after 30 days past release, not officially managed/supported by Security Onion. Another consideration is whether or not the traffic is being generated by a misconfigured piece of equipment. so-rule allows you to disable, enable, or modify NIDS rules. Try checking /var/log/nsm/hostname-interface/snortu-1.log for clues and please post the exact rule syntax you are attempting to use. 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. Open /etc/nsm/rules/local.rules using your favorite text editor. In the configuration window, select the relevant form of Syslog - here, it's Syslog JSON - and click. Apply the firewall state to the node, or wait for the highstate to run for the changes to happen automatically. alert icmp any any -> any any (msg: "ICMP Testing"; sid:1000001; rev:1;). If you do not see this alert, try checking to see if the rule is enabled in /opt/so/rules/nids/all.rules: Rulesets come with a large number of rules enabled (over 20,000 by default). . If SID 4321 is noisy, you can disable it as follows: From the manager, run the following to update the config: If you want to disable multiple rules at one time, you can use a regular expression, but make sure you enclose the full entry in single quotes like this: We can use so-rule to modify an existing NIDS rule. Escalate local privileges to root level. Adding local rules in Security Onion is a rather straightforward process. Security Onion. Download Security Onion 20110116. You can read more about this at https://redmine.openinfosecfoundation.org/issues/4377. The files in this directory should not be modified as they could possibly be overwritten during a soup update in the event we update those files. 2. However, generating custom traffic to test the alert can sometimes be a challenge. /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. Salt is a new approach to infrastructure management built on a dynamic communication bus. /opt/so/saltstack/local/salt/firewall/portgroups.local.yaml defines custom port groups. It's simple enough to run in small environments without many issues and allows advanced users to deploy distributed systems that can be used in network enterprise type environments. The territories controlled by the ROC consist of 168 islands, with a combined area of 36,193 square . If you want to apply the threshold to a single node, place the pillar in /opt/so/saltstack/local/pillar/minions/.sls. to security-onion yes it is set to 5, I have also played with the alert levels in the rules to see if the number was changing anything. Host groups and port groups can be created or modified from the manager node using either so-allow, so-firewall or manually editing the yaml files. For example, suppose that we want to modify SID 2100498 and replace any instances of returned root with returned root test. This section will cover both network firewalls outside of Security Onion and the host-based firewall built into Security Onion. Write your rule, see Rules Format and save it. Security Onion offers the following choices for rulesets to be used by Suricata. 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. Start creating a file for your rule. With this functionality we can suppress rules based on their signature, the source or destination address and even the IP or full CIDR network block. . . It incorporates NetworkMiner, CyberChef, Squert, Sguil, Wazuh, Bro, Suricata, Snort, Kibana, Logstash, Elasticsearch, and numerous other security onion tools. 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. You received this message because you are subscribed to the Google Groups "security-onion" group. Naming convention: The collection of server processes has a server name separate from the hostname of the box. Default YARA rules are provided from Florian Roths signature-base Github repo at https://github.com/Neo23x0/signature-base. The server is also responsible for ruleset management. 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. 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 . Revision 39f7be52. Cleaning up local_rules.xml backup files older than 30 days. 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. 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. 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. =========================================================================Top 50 All time Sguil Events=========================================================================Totals GenID:SigID Signature1686 1:1000003 UDP Testing Rule646 1:1000001 ICMP Testing Rule2 1:2019512 ET POLICY Possible IP Check api.ipify.org1 1:2100498 GPL ATTACK_RESPONSE id check returned rootTotal2335, =========================================================================Last update=========================================================================. Adding local rules in Security Onion is a rather straightforward process. Security Onion has Snort built in and therefore runs in the same instance. 1. For some alerts, your understanding of your own network and the business being transacted across it will be the deciding factor. (Alternatively, you can press Ctrl+Alt+T to open a new shell.) Boot the ISO and run through the installer. In Security Onion, locally created rules are stored in /opt/so/rules/nids/local.rules. MISP Rules. If . Are you sure you want to create this branch? If you pivot from that alert to the corresponding pcap you can verify the payload we sent. After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. we run SO in a distributed deployment and the manager doesn't run strelka but does run on the sensor, the paths however (/opt/so/saltstack/local/salt/strelka/rules) exist on the manger but not the sensor, I did find the default repo under opt/so/saltstack/default/salt/strelka/rules/ on the manager and I can run so-yara-update but not so-strelka-restart because its not running on the manager so I'm a little confused on where I should be putting the custom YARA rules because things don't line up with the documentation or I'm just getting super confused. The error can be ignored as it is not an indication of any issue with the minions. We've been teaching Security Onion classes and providing Professional Services since 2014. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. Revision 39f7be52. Where is it that you cannot view them? Within 15 minutes, Salt should then copy those rules into /opt/so/rules/nids/local.rules. In a distributed Security Onion environment, you only need to change the configuration in the manager pillar and then all other nodes will get the updated rules automatically. Run the following command to get a listing of categories and the number of rules in each: In tuning your sensor, you must first understand whether or not taking corrective actions on this signature will lower your overall security stance. https://securityonion.net/docs/AddingLocalRules. Open /etc/nsm/rules/local.rules using your favorite text editor. 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. Port groups are a way of grouping together ports similar to a firewall port/service alias. Start by creating Berkeley Packet Filters (BPFs) to ignore any traffic that you don't want your network sensors to process. (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. According to NIST, which step in the digital forensics process involves drawing conclusions from data? 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. You signed in with another tab or window. Global pillar file: This is the pillar file that can be used to make global pillar assignments to the nodes. You could try testing a rule . Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. 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: These policy types can be found in /etc/nsm/rules/downloaded.rules. There are three alerting engines within Security Onion: Suricata, Wazuh and Playbook (Sigma). > To unsubscribe from this topic . The remainder of this section will cover the host firewall built into Security Onion. 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). . After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. A tag already exists with the provided branch name. 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. Security Onion is a free and open platform for threat hunting, enterprise security monitoring, and log management. Do you see these alerts in Squert or ELSA? . It . If you built the rule correctly, then snort should be back up and running. Data collection Examination Nodes will be configured to pull from repocache.securityonion.net but this URL does not actually exist on the Internet, it is just a special address for the manager proxy. Interested in discussing how our products and services can help your organization? All node types are added to the minion host group to allow Salt communication. This repository has been archived by the owner on Apr 16, 2021. Generate some traffic to trigger the alert. When editing these files, please be very careful to respect YAML syntax, especially whitespace. If you would like to pull in NIDS rules from a MISP instance, please see: But after I run the rule-update command, no alert is generated in Sguil based on that rule.It was working when I first installed Security Onion. To add local YARA rules, create a directory in /opt/so/saltstack/local/salt/strelka/rules, for example localrules. idstools may seem like it is ignoring your disabled rules request if you try to disable a rule that has flowbits set. Once logs are generated by network sniffing processes or endpoints, where do they go? Let's add a simple rule that will alert on the detection of a string in a tcp session: Run rule-update (this will merge local.rules into downloaded.rules, update sid-msg.map, and restart processes as necessary): If you built the rule correctly, then Snort/Suricata should be back up and running. This directory stores the firewall rules specific to your grid. You may see the following error in the salt-master log located at /opt/so/log/salt/master: The root cause of this error is a state trying to run on a minion when another state is already running. The default allow rules for each node are defined by its role (manager, searchnode, sensor, heavynode, etc) in the grid. 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? 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. In the image below, we can see how we define some rules for an eval node. 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. However, the exception is now logged. In order to apply the threshold to all nodes, place the pillar in /opt/so/saltstack/local/pillar/global.sls. 4. 5. To unsubscribe from this group and stop receiving emails from it, send an email to. Please note if you are using a ruleset that enables an IPS policy in /etc/nsm/pulledpork/pulledpork.conf, your local rules will be disabled. 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. Please update your bookmarks. If you need to manually update your rules, you can run the following on your manager node: If you have a distributed deployment and you update the rules on your manager node, then those rules will automatically replicate from the manager node to your sensors within 15 minutes. If this is a distributed deployment, edit local.rules on your master server and it will replicate to your sensors. More information on each of these topics can be found in this section. 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. Security Onion includes best-of-breed free and open tools including Suricata, Zeek, Wazuh, the Elastic Stack and many others. Tuning NIDS Rules in Security Onion - YouTube 0:00 / 15:12 Tuning NIDS Rules in Security Onion 1,511 views Jan 10, 2022 This video shows you how to tune Suricata NIDS rules in. and dont forget that the end is a semicolon and not a colon. Please provide the output of sostat-redacted, attaching as a plain text file, or by using a service like Pastebin.com. 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. By default, only the analyst hostgroup is allowed access to the nginx ports. 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. For example, if you want to modify SID 2009582 and change $EXTERNAL_NET to $HOME_NET: The first string is a regex pattern, while the second is just a raw value. Security Onion Layers Ubuntu based OS Snort, Suricata Snorby Bro Sguil Squert epic charting system training Our instructors are the only Security Onion Certified Instructors in the world and our course material is the only authorized training material for Security Onion. Some node types get their IP assigned to multiple host groups. This writeup contains a listing of important Security Onion files and directories. Been looking to add some custom YARA rules and have been following the docs https://docs.securityonion.net/en/2.3/local-rules.html?#id1 however I'm a little confused. You can see that we have an alert with the IP addresses we specified and the TCP ports we specified. For example, if you dont care that users are accessing Facebook, then you can silence the policy-based signatures for Facebook access. We offer both training and support for Security Onion. Our appliances will save you and your team time and resources, allowing you to focus on keeping your organization secure. I've just updated the documentation to be clearer. 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. Copyright 2023 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. Integrated into the Security Onion, OSSEC is a host-based intrusion detection system (HIDS) that can conduct file integrity monitoring, local log monitoring, system process monitoring, and rootkit detection. > > => I do not know how to do your guilde line. Find Age Regression Discord servers and make new friends! 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 ->. In a distributed deployment, the manager node controls all other nodes via salt. When you run so-allow or so-firewall, it modifies this file to include the IP provided in the proper hostgroup. Our products include both the Security Onion software and specialized hardware appliances that are built and tested to run Security Onion. Run rule-update (this will merge local.rules into downloaded.rules, update. Ingest. If it is, then the most expedient measure may be to resolve the misconfiguration and then reinvestigate tuning. Host groups are similar to port groups but for storing lists of hosts that will be allowed to connect to the associated port groups. Enter the following sample in a line at a time. If you want to tune Wazuh HIDS alerts, please see the Wazuh section. the rule is missing a little syntax, maybe try: alert icmp any any -> $HOME_NET any (msg:"ICMP Testing"; sid:1000001; rev:1;). When configuring network firewalls for Internet-connected deployments (non-Airgap), youll want to ensure that the deployment can connect outbound to the following: In the case of a distributed deployment, you can configure your nodes to pull everything from the manager so that only the manager requires Internet access. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. Security Onion a free and open platform for intrusion detection, enterprise security monitoring, and log management. to security-onion When I run 'rule-update' it give an error that there are no rules in /usr/local/lib/snort_dynamicrules. 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. Previously, in the case of an exception, the code would just pass. You should only run the rules necessary for your environment, so you may want to disable entire categories of rules that dont apply to you. 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. The National Institutes of Standards and Technology (NIST) 800-171 cybersecurity standard has four safeguards that are related to network traffic monitoring: 3.13.1: Monitor, control, and protect organizational communications (i.e., information transmitted or received by organizational information Please review the Salt section to understand pillars and templates. You do not have permission to delete messages in this group, Either email addresses are anonymous for this group or you need the view member email addresses permission to view the original message. . You can see that we have an alert with the IP addresses we specified and the TCP ports we specified. Our documentation has moved to https://securityonion.net/docs/. You can use salts test.ping to verify that all your nodes are up: Similarly, you can use salts cmd.run to execute a command on all your nodes at once. Firewall Requirements Salt minions must be able to connect to the manager node on ports 4505/tcp and 4506/tcp: All alerts are viewable in Alerts, Dashboards, Hunt, and Kibana. When I run sostat. In this file, the idstools section has a modify sub-section where you can add your modifications. In 2008, Doug Burks started working on Security Onion, a Linux distribution for intrusion detection, network security monitoring, and log management. Once your rules and alerts are under control, then check to see if you have packet loss. To unsubscribe from this group and stop receiving emails from it, send an email to security-onio.@googlegroups.com. 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, 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). There isnt much in here other than anywhere, dockernet, localhost and self. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. . Within 15 minutes, Salt should then copy those rules into /opt/so/rules/nids/local.rules. Started by Doug Burks, and first released in 2009, Security Onion has. 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. 3. Security. See above for suppress examples. 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. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. For example: By default, if you use so-allow to add a host to the syslog hostgroup, that host will only be allowed to connect to the manager node. Assuming you have Internet access, Security Onion will automatically update your NIDS rules on a daily basis. Copyright 2023 Managing firewall rules for all devices should be done from the manager node using either so-allow, so-firewall or, for advanced cases, manually editing the yaml files. While Vanderburgh County was the seventh-largest county in 2010 population with 179,703 people, it is also the eighth-smallest county in area in Indiana and the smallest in southwestern Indiana, covering only 236 square miles (610 km2). In a distributed deployment, the manager node controls all other nodes via salt. If you dont want to wait for these automatic processes, you can run them manually from the manager (replacing $SENSORNAME_$ROLE as necessary): Lets add a simple rule to /opt/so/saltstack/local/salt/idstools/local.rules thats really just a copy of the traditional id check returned root rule: Restart Suricata (replacing $SENSORNAME_$ROLE as necessary): If you built the rule correctly, then Suricata should be back up and running.
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