Our products include both the Security Onion software and specialized hardware appliances that are built and tested to run Security Onion. Adding local rules in Security Onion is a rather straightforward process. MISP Rules. 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. Revision 39f7be52. Please update your bookmarks. To unsubscribe from this group and stop receiving emails from it, send an email to. In a distributed deployment, the manager node controls all other nodes via salt. Check your syslog-ng configuration for the name of the local log source ("src" is used on SUSE systems). In Security Onion, locally created rules are stored in /opt/so/rules/nids/local.rules. This directory stores the firewall rules specific to your grid. Edit the /opt/so/rules/nids/local.rules file using vi or your favorite text editor: Paste the rule. 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 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, When I run sostat. By default, only the analyst hostgroup is allowed access to the nginx ports. The set of processes includes sguild, mysql, and optionally the Elastic stack (Elasticsearch, Logstash, Kibana) and Curator. 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. Identification. Write your rule, see Rules Format and save it. > > > > > > > > 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. Hi @Trash-P4nda , I've just updated the documentation to be clearer. See above for suppress examples. Salt sls files are in YAML format. 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. You can add NIDS rules in /opt/so/saltstack/local/salt/idstools/local.rules on your manager. 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 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. To verify the Snort version, type in snort -Vand hit Enter. 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. Please review the Salt section to understand pillars and templates. 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. > To unsubscribe from this topic . In the image below, we can see how we define some rules for an eval node. 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. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. Security Onion includes best-of-breed free and open tools including Suricata, Zeek, Wazuh, the Elastic Stack and many others. Download Security Onion 20110116. After viewing your redacted sostat it seems that the ICMP and UDP rules are triggering: Are you using SO with in a VM? 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. If you right click on the, You can learn more about snort and writing snort signatures from the. . Data collection Examination Cleaning up local_rules.xml backup files older than 30 days. 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 ->. 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. 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 . However, generating custom traffic to test the alert can sometimes be a challenge. Copyright 2023 Reboot into your new Security Onion installation and login using the username/password you specified in the previous step. 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). Answered by weslambert on Dec 15, 2021. Please keep this value below 90 seconds otherwise systemd will reach timeout and terminate the service. If you need to increase this delay, it can be done using the salt:minion:service_start_delay pillar. 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. Double-click the Setup script on the Desktop and follow the prompts to configure and start the Sguil processes. > > => I do not know how to do your guilde line. Naming convention: The collection of server processes has a server name separate from the hostname of the box. Logs . Long-term you should only run the rules necessary for > your environment. 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. More information on each of these topics can be found in this section. Escalate local privileges to root level. You can find the latest version of this page at: https://securityonion.net/docs/AddingLocalRules. Security Deposit Reliable Up to $5,000 Payments Higher rents as supported by comparable rents Higher Voucher Payment Standards (VPS) 10/1/2021 Signing Bonus 1 - Bedroom = $893 to $1,064 2 - Bedroom = $1,017 to $1,216 3 - Bedroom = $1,283 to $1,530 4 - Bedroom = $1,568 to $1,872 5 - Bedroom = $1,804 to $2,153 6 - Bedroom = $2,038 to . 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. In a distributed deployment, the manager node controls all other nodes via salt. Copyright 2023 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. Backing up current downloaded.rules file before it gets overwritten. For a Security Onion client, you should dedicate at least 2GB RAM, but ideally 4GB if possible. And when I check, there are no rules there. Give feedback. 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. To enable the Talos Subscriber ruleset in an already installed grid, modify the /opt/so/saltstack/local/pillar/minions/ file as follows: To add other remotely-accessible rulesets, add an entry under urls for the ruleset URL in /opt/so/saltstack/local/pillar/minions/: Copyright 2023 Tracking. so-rule allows you to disable, enable, or modify NIDS rules. If you want to tune Wazuh HIDS alerts, please see the Wazuh section. These are the files that will need to be changed in order to customize nodes. When editing these files, please be very careful to respect YAML syntax, especially whitespace. 1. ELSA? The default allow rules for each node are defined by its role (manager, searchnode, sensor, heavynode, etc) in the 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. Managing Rules; Adding Local Rules; Managing Alerts; High Performance Tuning; Tricks and Tips. If you dont want to wait 15 minutes, you can force the sensors to update immediately by running the following command on your manager node: Security Onion offers the following choices for rulesets to be used by Suricata. If you try to disable the first two rules without disabling the third rule (which has flowbits:isset,ET.MSSQL) the third rule could never fire due to one of the first two rules needing to fire first. 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. There isnt much in here other than anywhere, dockernet, localhost and self. To configure syslog for Security Onion: Stop the Security Onion service. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. . The rule categories are Malware-Cnc, Blacklist, SQL injection, Exploit-kit, and rules from the connectivity ruleset Security: CVSS Score of 8 or higher Vulnerability age is four years old and newer The rule categories include Balanced and Connectivity with one additional category being App-detect Youll need to ensure the first of the two properly escapes any characters that would be interpreted by regex. We offer both training and support for Security Onion. Security Onion. I've just updated the documentation to be clearer. You can read more about this at https://redmine.openinfosecfoundation.org/issues/4377. This writeup contains a listing of important Security Onion files and directories. You signed in with another tab or window. Any pointers would be appreciated. Backing up current local_rules.xml file. You may want to bump the SID into the 90,000,000 range and set the revision to 1. Security Onion is an open-source and free Linux distribution for log management, enterprise security monitoring, and intrusion detection. 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). After select all interfaces also ICMP logs not showing in sguil. Some node types get their IP assigned to multiple host groups. 3. Backups; Docker; DNS Anomaly Detection; Endgame; ICMP Anomaly Detection; Jupyter Notebook; Machine Learning; Adding a new disk; PCAPs for Testing; Removing a Node; Syslog Output; UTC and Time Zones; Utilities. Before You Begin. 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? Cannot retrieve contributors at this time. Salt sls files are in YAML format. The next run of idstools should then merge /opt/so/rules/nids/local.rules into /opt/so/rules/nids/all.rules which is what Suricata reads from. 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. Run so-rule without any options to see the help output: We can use so-rule to modify an existing NIDS rule. . Revision 39f7be52. This wiki is no longer maintained. to security-onion When I run 'rule-update' it give an error that there are no rules in /usr/local/lib/snort_dynamicrules. However, generating custom traffic to test the alert can sometimes be a challenge. When editing these files, please be very careful to respect YAML syntax, especially whitespace. Then tune your IDS rulesets. Firewall Requirements Salt minions must be able to connect to the manager node on ports 4505/tcp and 4506/tcp: In this file, the idstools section has a modify sub-section where you can add your modifications. Check out our NIDS tuning video at https://youtu.be/1jEkFIEUCuI! Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. How are they parsed? Adding local rules in Security Onion is a rather straightforward process. Minion pillar file: This is the minion specific pillar file that contains pillar definitions for that node. However, the exception is now logged. Our documentation has moved to https://securityonion.net/docs/. 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. 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 Salt is a new approach to infrastructure management built on a dynamic communication bus. To get the best performance out of Security Onion, youll want to tune it for your environment. For more information, please see: # alert ip any any -> any any (msg:"GPL ATTACK_RESPONSE id check returned root"; content:"uid=0|28|root|29|"; classtype:bad-unknown; sid:2100498; rev:7; metadata:created_at 2010_09_23, updated_at 2010_09_23;), /opt/so/saltstack/local/pillar/minions/_.sls, "GPL ATTACK_RESPONSE id check returned root test", /opt/so/saltstack/default/pillar/thresholding/pillar.usage, /opt/so/saltstack/default/pillar/thresholding/pillar.example, /opt/so/saltstack/local/pillar/global.sls, /opt/so/saltstack/local/pillar/minions/.sls, https://docs.saltproject.io/en/latest/topics/troubleshooting/yaml_idiosyncrasies.html, https://redmine.openinfosecfoundation.org/issues/4377, https://blog.snort.org/2011/05/resolving-flowbit-dependancies.html. 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. You may want to bump the SID into the 90,000,000 range and set the revision to 1. 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. 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. idstools may seem like it is ignoring your disabled rules request if you try to disable a rule that has flowbits set. The remainder of this section will cover the host firewall built into Security Onion. Logs. Global pillar file: This is the pillar file that can be used to make global pillar assignments to the nodes. If you want to apply the threshold to a single node, place the pillar in /opt/so/saltstack/local/pillar/minions/.sls. c96 extractor. For example, if you dont care that users are accessing Facebook, then you can silence the policy-based signatures for Facebook access. Can anyone tell me > > > > what I've done wrong please? /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. Any definitions made here will override anything defined in other pillar files, including global. 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. If you were to add a search node, you would see its IP appear in both the minion and the search_node host groups. 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,. Ingest. You received this message because you are subscribed to the Google Groups "security-onion" group. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. Beta Previously, in the case of an exception, the code would just pass. After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. Boot the ISO and run through the installer. In the configuration window, select the relevant form of Syslog - here, it's Syslog JSON - and click. Finally, from the manager, update the config on the remote node: You can manage threshold entries for Suricata using Salt pillars. If it is, then the most expedient measure may be to resolve the misconfiguration and then reinvestigate tuning. Open /etc/nsm/rules/local.rules using your favorite text editor. The signature id (SID) must be unique. 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. 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 order to apply the threshold to all nodes, place the pillar in /opt/so/saltstack/local/pillar/global.sls. 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. 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). Are you sure you want to create this branch? 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. Once your rules and alerts are under control, then check to see if you have packet loss. idstools helpfully resolves all of your flowbit dependencies, and in this case, is re-enabling that rule for you on the fly. For example, if you include a bad custom snort rule with incorrect syntax, the snort engine will fail . If you would like to create a rule yourself and use it with Suricata, this guide might be helpful. Revision 39f7be52. For some alerts, your understanding of your own network and the business being transacted across it will be the deciding factor. Copyright 2023 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. Any line beginning with "#" can be ignored as it is a comment. Do you see these alerts in Squert or ELSA? It incorporates NetworkMiner, CyberChef, Squert, Sguil, Wazuh, Bro, Suricata, Snort, Kibana, Logstash, Elasticsearch, and numerous other security onion tools. These non-manager nodes are referred to as salt minions. For example, suppose we want to disable SID 2100498. As you can see I have the Security Onion machine connected within the internal network to a hub. Default YARA rules are provided from Florian Roths signature-base Github repo at https://github.com/Neo23x0/signature-base. 4. 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. Inside of /opt/so/saltstack/local/salt/strelka/rules/localrules, add your YARA rules. Security Onion is a free and open platform for threat hunting, enterprise security monitoring, and log management. Copyright 2023 /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. 2. . From https://docs.saltstack.com/en/latest/: Salt is a core component of Security Onion 2 as it manages all processes on all nodes. 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, consider the following rules that reference the ET.MSSQL flowbit. Tried as per your syntax, but still issue persists. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. 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. For a quick primer on flowbits, see https://blog.snort.org/2011/05/resolving-flowbit-dependancies.html. . 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 { 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 can do the reverse unit conversion from MPa to psi, or enter any two units below:LED MSI Optix G242 24 inch IPS Gaming Monitor - Full HD - 144Hz Refresh Rate - 1ms Response time - Adaptive Sync for Esports (9S6-3BA41T-039) LED MSI OPTIX G272 Gaming Monitor 27" FHD IPS 144HZ 1MS Adaptive Sync (9S6-3CB51T-036) LG 27 FHD IPS 1ms 240Hz G . Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. 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. 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) Here are some of the items that can be customized with pillar settings: Currently, the salt-minion service startup is delayed by 30 seconds. and dont forget that the end is a semicolon and not a colon. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert.
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