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/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. Security. Start creating a file for your rule. 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! You can see that we have an alert with the IP addresses we specified and the TCP ports we specified. jq; so-allow; so-elastic-auth; so . 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. Please update your bookmarks. Security Onion is a free and open source platform for threat hunting, network security monitoring, and log management. If there are a large number of uncategorized events in the securityonion_db database, sguil can have a hard time of managing the vast amount of data it needs to process to present a comprehensive overview of the alerts. Are you sure you want to create this branch? You need to configure Security Onion to send syslog so that InsightIDR can ingest it. Tried as per your syntax, but still issue persists. If you would like to pull in NIDS rules from a MISP instance, please see the MISP Rules section. alert icmp any any -> any any (msg: "ICMP Testing"; sid:1000001; rev:1;). According to NIST, which step in the digital forensics process involves drawing conclusions from data? 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. Some of these refer to areas where data is stored, while others point to configuration files that can be modified to change how Security Onion interacts with various tools. 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. In the image below, we can see how we define some rules for an eval node. Launch your Ubuntu Server VM, log on with credentials provided at the beginning of this guide and open a terminal shell by double-clicking the Desktop shortcut. 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 order to apply the threshold to all nodes, place the pillar in /opt/so/saltstack/local/pillar/global.sls. Cannot retrieve contributors at this time. (Alternatively, you can press Ctrl+Alt+T to open a new shell.) Firewall Requirements Salt minions must be able to connect to the manager node on ports 4505/tcp and 4506/tcp: After select all interfaces also ICMP logs not showing in sguil. 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. For a quick primer on flowbits, see https://blog.snort.org/2011/05/resolving-flowbit-dependancies.html. Salt can be used for data-driven orchestration, remote execution for any infrastructure, configuration management for any app stack, and much more. 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. We can start by listing any currently disabled rules: Once that completes, we can then verify that 2100498 is now disabled with so-rule disabled list: Finally, we can check that 2100498 is commented out in /opt/so/rules/nids/all.rules: If you cant run so-rule, then you can modify configuration manually. 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. Write your rule, see Rules Format and save it. 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. Saltstack states are used to ensure the state of objects on a minion. Inside of /opt/so/saltstack/local/salt/strelka/rules/localrules, add your YARA rules. We offer both training and support for Security Onion. 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. If you are on a large network, you may need to do additional tuning like pinning processes to CPU cores. When you purchase products and services from us, you're helping to fund development of Security Onion! 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. 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. This directory contains the default firewall rules. Reboot into your new Security Onion installation and login using the username/password you specified in the previous step. Security Onion a free and open platform for intrusion detection, enterprise security monitoring, and log management. Revision 39f7be52. 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. These non-manager nodes are referred to as salt minions. Security Onion is a intrusion detection and network monitoring tool. 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. In syslog-ng, the following configuration forwards all local logs to Security Onion. 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 . Once your rules and alerts are under control, then check to see if you have packet loss. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. 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 Answered by weslambert on Dec 15, 2021. to security-onion When I run 'rule-update' it give an error that there are no rules in /usr/local/lib/snort_dynamicrules. These policy types can be found in /etc/nsm/rules/downloaded.rules. These are the files that will need to be changed in order to customize nodes. Revision 39f7be52. Security Onion offers the following choices for rulesets to be used by Suricata. Run so-rule without any options to see the help output: We can use so-rule to modify an existing NIDS rule. 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. Open /etc/nsm/rules/local.rules using your favorite text editor. MISP Rules. Generate some traffic to trigger the alert. You can add Wazuh HIDS rules in /opt/so/rules/hids/local_rules.xml. Another consideration is whether or not the traffic is being generated by a misconfigured piece of equipment. You signed in with another tab or window. You can see that we have an alert with the IP addresses we specified and the TCP ports we specified. 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. Apply the firewall state to the node, or wait for the highstate to run for the changes to happen automatically. /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. 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. 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. All alerts are viewable in Alerts, Dashboards, Hunt, and Kibana. Any definitions made here will override anything defined in other pillar files, including global. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. 5. Managing Rules; Adding Local Rules; Managing Alerts; High Performance Tuning; Tricks and Tips. You can learn more about scapy at secdev.org and itgeekchronicles.co.uk. 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. In this file, the idstools section has a modify sub-section where you can add your modifications. 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. . In Security Onion, locally created rules are stored in /opt/so/rules/nids/local.rules. Custom rules can be added to the local.rules file Rule threshold entries can . If you need to increase this delay, it can be done using the salt:minion:service_start_delay pillar. Add the following to the minions sls file located at. To enable or disable SIDs for Suricata, the Salt idstools pillar can be used in the minion pillar file (/opt/so/saltstack/local/pillar/minions/_.sls). You received this message because you are subscribed to the Google Groups "security-onion" group. Within 15 minutes, Salt should then copy those rules into /opt/so/rules/nids/local.rules. When editing these files, please be very careful to respect YAML syntax, especially whitespace. If you would like to create a rule yourself and use it with Suricata, this guide might be helpful. /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. Salt minions must be able to connect to the manager node on ports, /opt/so/saltstack/local/pillar/global.sls, /opt/so/saltstack/local/pillar/minions/.sls, https://docs.saltproject.io/en/getstarted/system/communication.html, https://docs.saltproject.io/en/latest/topics/troubleshooting/yaml_idiosyncrasies.html. Naming convention: The collection of server processes has a server name separate from the hostname of the box. Finally, run so-strelka-restart to allow Strelka to pull in the new rules. When I run sostat. This wiki is no longer maintained. 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. 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. Double-click the Setup script on the Desktop and follow the prompts to configure and start the Sguil processes. Let's add a simple rule that will alert on the detection of a string in a tcp session. 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). Identification. All the following will need to be run from the manager. . The error can be ignored as it is not an indication of any issue with the minions. /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. Revision 39f7be52. 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 { PFA local.rules. idstools may seem like it is ignoring your disabled rules request if you try to disable a rule that has flowbits set. After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. Pillars are a Saltstack concept, formatted typically in YAML, that can be used to parameterize states via templating. And when I check, there are no rules there. Local pillar file: This is the pillar file under /opt/so/saltstack/local/pillar/. Revision 39f7be52. All node types are added to the minion host group to allow Salt communication. Ingest. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. . Edit the /opt/so/rules/nids/local.rules file using vi or your favorite text editor: sudo vi /opt/so/rules/nids/local.rules Paste the 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. 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, generating custom traffic to test the alert can sometimes be a challenge. 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. Can anyone tell me > > > > what I've done wrong please? 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. . In 2008, Doug Burks started working on Security Onion, a Linux distribution for intrusion detection, network security monitoring, and log management. You signed in with another tab or window. 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. 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. Default pillar file: This is the pillar file located under /opt/so/saltstack/default/pillar/. For example, if you dont care that users are accessing Facebook, then you can silence the policy-based signatures for Facebook access. in Sguil? 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. In Security Onion, locally created rules are stored in /opt/so/rules/nids/local.rules. This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. Before You Begin. I've just updated the documentation to be clearer. After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. Within 15 minutes, Salt should then copy those rules into /opt/so/rules/nids/local.rules. Data collection Examination You signed in with another tab or window. 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. Manager of Support and Professional Services. To configure syslog for Security Onion: Stop the Security Onion service. Security Onion is a free and open platform for threat hunting, enterprise security monitoring, and log management. Copyright 2023 Our documentation has moved to https://securityonion.net/docs/. Open /etc/nsm/rules/local.rules using your favorite text editor. . ELSA? 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. and dont forget that the end is a semicolon and not a colon. 41 - Network Segmentation, VLANs, and Subnets. 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. There are many ways to achieve age regression, but the three primary methods are: Botox. 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) One of those regular interventions is to ensure that you are tuning properly and proactively attempting to reach an acceptable level of signal to noise. 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. Minion pillar file: This is the minion specific pillar file that contains pillar definitions for that node. /opt/so/saltstack/default/salt/firewall/hostgroups.yaml is where the default hostgroups are defined. It is now read-only. Adding local rules in Security Onion is a rather straightforward process. It . Our appliances will save you and your team time and resources, allowing you to focus on keeping your organization secure. This will add the host group to, Add the desired IPs to the host group. The second only needs the $ character escaped to prevent bash from treating that as a variable. Here are some of the items that can be customized with pillar settings: Currently, the salt-minion service startup is delayed by 30 seconds. idstools helpfully resolves all of your flowbit dependencies, and in this case, is re-enabling that rule for you on the fly. epic charting system training It incorporates NetworkMiner, CyberChef, Squert, Sguil, Wazuh, Bro, Suricata, Snort, Kibana, Logstash, Elasticsearch, and numerous other security onion tools. Now that the configuration is in place, you can either wait for the sensor to sync with Salt running on the manager, or you can force it to update its firewall by running the following from the manager: Add the required ports to the port group. Set anywhere from 5 to 12 in the local_rules Kevin. In the configuration window, select the relevant form of Syslog - here, it's Syslog JSON - and click. Default YARA rules are provided from Florian Roths signature-base Github repo at https://github.com/Neo23x0/signature-base. 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 . Now we have to build the association between the host group and the syslog port group and assign that to our sensor node. Escalate local privileges to root level. 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. 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. Disabling all three of those rules by adding the following to disablesid.conf has the obvious negative effect of disabling all three of the rules: When you run sudo so-rule-update, watch the Setting Flowbit State section and you can see that if you disable all three (or however many rules share that flowbit) that the Enabled XX flowbits line is decremented and all three rules should then be disabled in your all.rules. 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. Salt is a core component of Security Onion 2 as it manages all processes on all nodes. Revision 39f7be52. Adding Your Own Rules . Salt sls files are in YAML format. 1. 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. Security Onion includes best-of-breed free and open tools including Suricata, Zeek, Wazuh, the Elastic Stack and many others. c96 extractor. Global pillar file: This is the pillar file that can be used to make global pillar assignments to the nodes. From the Command Line. 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. 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 review the Salt section to understand pillars and templates. (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. the rule is missing a little syntax, maybe try: alert icmp any any -> $HOME_NET any (msg:"ICMP Testing"; sid:1000001; rev:1;). Diagnostic logs can be found in /opt/so/log/salt/. Try checking /var/log/nsm/hostname-interface/snortu-1.log for clues and please post the exact rule syntax you are attempting to use. Files here should not be modified as changes would be lost during a code update. 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,. If so, then tune the number of AF-PACKET workers for sniffing processes. 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. If you right click on the, You can learn more about snort and writing snort signatures from the. However, generating custom traffic to test the alert can sometimes be a challenge. However, the exception is now logged. From https://docs.saltstack.com/en/latest/: Salt is a core component of Security Onion 2 as it manages all processes on all nodes. A. Generate some traffic to trigger the alert. To get the best performance out of Security Onion, youll want to tune it for your environment. Adding local rules in Security Onion is a rather straightforward process. Please note that Suricata 6 has a 64-character limitation on the IP field in a threshold. Modifying these values outside of so-allow or so-firewall could lead to problems accessing your existing hosts. This way, you still have the basic ruleset, but the situations in which they fire are altered. Host groups are similar to port groups but for storing lists of hosts that will be allowed to connect to the associated port groups. 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. 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. Security Onion Layers Ubuntu based OS Snort, Suricata Snorby Bro Sguil Squert In a distributed deployment, the manager node controls all other nodes via salt. 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. 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. There isnt much in here other than anywhere, dockernet, localhost and self. 3. 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. Boot the ISO and run through the installer. Copyright 2023 When you run so-allow or so-firewall, it modifies this file to include the IP provided in the proper hostgroup. We created and maintain Security Onion, so we know it better than anybody else. For more information about Salt, please see https://docs.saltstack.com/en/latest/.