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. Within 15 minutes, Salt should then copy those rules into /opt/so/rules/nids/local.rules. so-rule allows you to disable, enable, or modify NIDS rules. The remainder of this section will cover the host firewall built into Security Onion. 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 ->. There isnt much in here other than anywhere, dockernet, localhost and self. . 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 this is a distributed deployment, edit local.rules on your master server and it will replicate to your sensors. 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. This directory stores the firewall rules specific to your grid. 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. Please update your bookmarks. Any line beginning with "#" can be ignored as it is a comment. You can add Wazuh HIDS rules in /opt/so/rules/hids/local_rules.xml. > > > > > > > > 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. 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 The signature id (SID) must be unique. 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. 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 . 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. You could try testing a rule . 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. Global pillar file: This is the pillar file that can be used to make global pillar assignments to the nodes. At those times, it can be useful to query the database from the commandline. More information on each of these topics can be found in this section. Saltstack states are used to ensure the state of objects on a minion. Download Security Onion 20110116. 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. Beta This first sub-section will discuss network firewalls outside of Security Onion. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. 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. Firewall Requirements Salt minions must be able to connect to the manager node on ports 4505/tcp and 4506/tcp: Finally, run so-strelka-restart to allow Strelka to pull in the new rules. 1. Diagnostic logs can be found in /opt/so/log/salt/. Copyright 2023 Revision 39f7be52. Before You Begin. 4. Next, run so-yara-update to pull down the rules. epic charting system training Youll need to ensure the first of the two properly escapes any characters that would be interpreted by regex. In the configuration window, select the relevant form of Syslog - here, it's Syslog JSON - and click. 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. Data collection Examination 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. Once logs are generated by network sniffing processes or endpoints, where do they go? For example, to check disk space on all nodes: If you want to force a node to do a full update of all salt states, you can run so-checkin. This section will cover both network firewalls outside of Security Onion and the host-based firewall built into Security Onion. If you right click on the, You can learn more about snort and writing snort signatures from the. You can add NIDS rules in /opt/so/saltstack/local/salt/idstools/local.rules on your manager. Another consideration is whether or not the traffic is being generated by a misconfigured piece of equipment. Adding local rules in Security Onion is a rather straightforward process. Then tune your IDS rulesets. . Boot the ISO and run through the installer. /opt/so/saltstack/local/salt/firewall/assigned_hostgroups.local.map.yaml is where host group and port group associations would be made to create custom host group and port group assignements that would apply to all nodes of a certain role type in the grid. For example, suppose that we want to modify SID 2100498 and replace any instances of returned root with returned root test. Please note! MISP Rules. For example, the following threshold IP exceeds the 64-character limit: This results in the following error in the Suricata log: The solution is to break the ip field into multiple entries like this: A suppression rule allows you to make some finer grained decisions about certain rules without the onus of rewriting them. Run rule-update (this will merge local.rules into downloaded.rules, update. Some node types get their IP assigned to multiple host groups. How are they stored? 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. 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! (Alternatively, you can press Ctrl+Alt+T to open a new shell.) 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. Naming convention: The collection of server processes has a server name separate from the hostname of the box. Revision 39f7be52. Copyright 2023 One thing you can do with it (and the one that most people are interested in) is to configure it for IDS mode. 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. Security Onion Layers Ubuntu based OS Snort, Suricata Snorby Bro Sguil Squert In this file, the idstools section has a modify sub-section where you can add your modifications. You can learn more about snort and writing snort signatures from the Snort Manual. 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 When editing these files, please be very careful to respect YAML syntax, especially whitespace. Once your rules and alerts are under control, then check to see if you have packet loss. You need to configure Security Onion to send syslog so that InsightIDR can ingest it. Now we have to build the association between the host group and the syslog port group and assign that to our sensor node. idstools helpfully resolves all of your flowbit dependencies, and in this case, is re-enabling that rule for you on the fly. This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. 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 located at /opt/so/saltstack/local/pillar/global.sls. For example, consider the following rules that reference the ET.MSSQL flowbit. Enter the following sample in a line at a time. Minion pillar file: This is the minion specific pillar file that contains pillar definitions for that node. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. 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. If you pivot from that alert to the corresponding pcap you can verify the payload we sent. Cannot retrieve contributors at this time. These policy types can be found in /etc/nsm/rules/downloaded.rules. Open /etc/nsm/rules/local.rules using your favorite text editor. 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. /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. If you would like to create a rule yourself and use it with Suricata, this guide might be helpful. Adding local rules in Security Onion is a rather straightforward process. /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. We've been teaching Security Onion classes and providing Professional Services since 2014. If you are on a large network, you may need to do additional tuning like pinning processes to CPU cores. 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. You can learn more about scapy at secdev.org and itgeekchronicles.co.uk. > To unsubscribe from this topic . As shown above, we edit the minion pillar and add the SID to the idstools - sids - disabled section. Assuming you have Internet access, Security Onion will automatically update your NIDS rules on a daily basis. After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. Answered by weslambert on Dec 15, 2021. You may want to bump the SID into the 90,000,000 range and set the revision to 1. After select all interfaces also ICMP logs not showing in sguil. /opt/so/saltstack/local/salt/firewall/portgroups.local.yaml defines custom port groups. 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 a free and open platform for intrusion detection, enterprise security monitoring, and log management. /opt/so/saltstack/default/salt/firewall/hostgroups.yaml is where the default hostgroups are defined. Durio zibethinus, native to Borneo and Sumatra, is the only species available in the international market.It has over 300 named varieties in Thailand and 100 in Malaysia, as of 1987. Started by Doug Burks, and first released in 2009, Security Onion has. 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. However, the exception is now logged. Then tune your IDS rulesets. 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). 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. The county seat is in Evansville. You can read more about this at https://redmine.openinfosecfoundation.org/issues/4377. 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. Where is it that you cannot view them? Salt is a new approach to infrastructure management built on a dynamic communication bus. 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). This repository has been archived by the owner on Apr 16, 2021. That's what we'll discuss in this section. Our products include both the Security Onion software and specialized hardware appliances that are built and tested to run Security Onion. Open /etc/nsm/rules/local.rules using your favorite text editor. 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. 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,. Backing up current local_rules.xml file. 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. Start by creating Berkeley Packet Filters (BPFs) to ignore any traffic that you dont want your network sensors to process. There are many ways to achieve age regression, but the three primary methods are: Botox. Security Onion. I went ahead and put in the below rules under /etc/nsm/local.rules and ran the rule-update command. When you run so-allow or so-firewall, it modifies this file to include the IP provided in the proper hostgroup. 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 in Sguil? Was this translation helpful? 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. For a quick primer on flowbits, see https://blog.snort.org/2011/05/resolving-flowbit-dependancies.html. You signed in with another tab or window. From the Command Line. These non-manager nodes are referred to as salt minions. If you would like to pull in NIDS rules from a MISP instance, please see: > > => I do not know how to do your guilde line. See above for suppress examples. Tried as per your syntax, but still issue persists. Security Onion is a intrusion detection and network monitoring tool. 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. To configure syslog for Security Onion: Stop the Security Onion service. c96 extractor. Revision 39f7be52. Revision 39f7be52. 2. A. Any definitions made here will override anything defined in other pillar files, including global. 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. Add the following to the minions sls file located at. In a distributed deployment, the manager node controls all other nodes via salt. We created and maintain Security Onion, so we know it better than anybody else. Start by creating Berkeley Packet Filters (BPFs) to ignore any traffic that you don't want your network sensors to process. When editing these files, please be very careful to respect YAML syntax, especially whitespace. Security Onion is a platform that allows you to monitor your network for security alerts. There are three alerting engines within Security Onion: Suricata, Wazuh and Playbook (Sigma). If you were to add a search node, you would see its IP appear in both the minion and the search_node host groups. 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. It incorporates NetworkMiner, CyberChef, Squert, Sguil, Wazuh, Bro, Suricata, Snort, Kibana, Logstash, Elasticsearch, and numerous other security onion tools. However, generating custom traffic to test the alert can sometimes be a challenge. 1. All node types are added to the minion host group to allow Salt communication. Host groups are similar to port groups but for storing lists of hosts that will be allowed to connect to the associated port groups. 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. All the following will need to be run from the manager. 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. IPS Policy This way, you still have the basic ruleset, but the situations in which they fire are altered. 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. Hi @Trash-P4nda , I've just updated the documentation to be clearer. . Write your rule, see Rules Format and save it. Security Onion includes best-of-breed free and open tools including Suricata, Zeek, Wazuh, the Elastic Stack and many others. Adding Your Own Rules . Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. Now that we have a signature that will generate alerts a little more selectively, we need to disable the original signature. 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 may seem like it is ignoring your disabled rules request if you try to disable a rule that has flowbits set. Logs . 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. Salt can be used for data-driven orchestration, remote execution for any infrastructure, configuration management for any app stack, and much more. Security Onion is a free and open source 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. This error now occurs in the log due to a change in the exception handling within Salts event module. For more information about Salt, please see https://docs.saltstack.com/en/latest/. Security Onion uses idstools to download new signatures every night and process them against a set list of user generated configurations. 5. You signed in with another tab or window. To verify the Snort version, type in snort -Vand hit Enter. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. The ip addresses can be random, but I would suggest sticking to RFC1918: Craft the layer 3 information Since we specified port 7789 in our snort rule: Use the / operator to compose our packet and transfer it with the send() method: Check Sguil/Squert/Kibana for the corresponding alert. /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. To add local YARA rules, create a directory in /opt/so/saltstack/local/salt/strelka/rules, for example localrules. . 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 A tag already exists with the provided branch name. 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. Generate some traffic to trigger the alert. 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. 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. For example, suppose we want to disable SID 2100498. 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 In Security Onion, locally created rules are stored in /opt/so/rules/nids/local.rules. 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. Security Onion offers the following choices for rulesets to be used by Suricata. Backing up current downloaded.rules file before it gets overwritten. This will add the host group to, Add the desired IPs to the host group. Revision 39f7be52. Files here should not be modified as changes would be lost during a code update. =========================================================================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=========================================================================.