All node types are added to the minion host group to allow Salt communication. If you would like to pull in NIDS rules from a MISP instance, please see: 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. 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. 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 We've been teaching Security Onion classes and providing Professional Services since 2014. This directory contains the default firewall rules. The durian (/ d r i n /, / dj r i n /) is the edible fruit of several tree species belonging to the genus Durio.There are 30 recognised Durio species, at least nine of which produce edible fruit. 3. You can add NIDS rules in /opt/so/saltstack/local/salt/idstools/local.rules on your manager. Revision 39f7be52. You signed in with another tab or window. 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. More information on each of these topics can be found in this section. 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). For a quick primer on flowbits, see https://blog.snort.org/2011/05/resolving-flowbit-dependancies.html. 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. /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. Please keep this value below 90 seconds otherwise systemd will reach timeout and terminate the service. If you right click on the, You can learn more about snort and writing snort signatures from the. Where is it that you cannot view them? 3. Some node types get their IP assigned to multiple host groups. After select all interfaces also ICMP logs not showing in sguil. Our documentation has moved to https://securityonion.net/docs/. The signature id (SID) must be unique. This error now occurs in the log due to a change in the exception handling within Salts event module. Answered by weslambert on Dec 15, 2021. For more information about Salt, please see https://docs.saltstack.com/en/latest/. to security-onion When I run 'rule-update' it give an error that there are no rules in /usr/local/lib/snort_dynamicrules. 1. Diagnostic logs can be found in /opt/so/log/salt/. Minion pillar file: This is the minion specific pillar file that contains pillar definitions for that node. Cannot retrieve contributors at this time. 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. 4. Open /etc/nsm/rules/local.rules using your favorite text editor. Then tune your IDS rulesets. Youll need to ensure the first of the two properly escapes any characters that would be interpreted by regex. To unsubscribe from this group and stop receiving emails from it, send an email to. 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. Manager of Support and Professional Services. 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. Logs . /opt/so/saltstack/local/salt/firewall/hostgroups.local.yaml is where many default named hostgroups get populated with IPs that are specific to your environment. Start by creating Berkeley Packet Filters (BPFs) to ignore any traffic that you dont want your network sensors to process. This will add the host group to, Add the desired IPs to the host group. Network Security Monitoring, as a practice, is not a solution you can plug into your network, make sure you see blinking lights and tell people you are secure. It requires active intervention from an analyst to qualify the quantity of information presented. 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) To add local YARA rules, create a directory in /opt/so/saltstack/local/salt/strelka/rules, for example localrules. 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 . /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. Please review the Salt section to understand pillars and templates. Copyright 2023 1. 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. You can learn more about snort and writing snort signatures from the Snort Manual. 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. Our products include both the Security Onion software and specialized hardware appliances that are built and tested to run Security Onion. From https://docs.saltstack.com/en/latest/: Salt is a core component of Security Onion 2 as it manages all processes on all nodes. > > > > > > > > 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. For example, if you include a bad custom snort rule with incorrect syntax, the snort engine will fail . 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. 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. Hi @Trash-P4nda , I've just updated the documentation to be clearer. 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. To unsubscribe from this group and stop receiving emails from it, send an email to security-onio.@googlegroups.com. 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. Please update your bookmarks. If you would like to pull in NIDS rules from a MISP instance, please see the MISP Rules section. Beta If . 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. Security. 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. 5. 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. You need to configure Security Onion to send syslog so that InsightIDR can ingest it. When you run so-allow or so-firewall, it modifies this file to include the IP provided in the proper hostgroup. 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. Before You Begin. If you have multiple entries for the same SID, it will cause an error in salt resulting in all of the nodes in your grid to error out when checking in. This way, you still have the basic ruleset, but the situations in which they fire are altered. Tried as per your syntax, but still issue persists. Long-term you should only run the rules necessary for > your environment. Give feedback. Ingest. Data collection Examination You can read more about this at https://redmine.openinfosecfoundation.org/issues/4377. Generate some traffic to trigger the alert. There are many ways to achieve age regression, but the three primary methods are: Botox. However, generating custom traffic to test the alert can sometimes be a challenge. We created and maintain Security Onion, so we know it better than anybody else. How are they stored? All the following will need to be run from the manager. . Security Onion is a intrusion detection and network monitoring tool. Revision 39f7be52. The remainder of this section will cover the host firewall built into Security Onion. Previously, in the case of an exception, the code would just pass. . Salt sls files are in YAML format. Modifying these values outside of so-allow or so-firewall could lead to problems accessing your existing hosts. 2. Edit the /opt/so/rules/nids/local.rules file using vi or your favorite text editor: Paste the rule. Also ensure you run rule-update on the machine. 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 You can learn more about scapy at secdev.org and itgeekchronicles.co.uk. 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 jq; so-allow; so-elastic-auth; so . 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 generate traffic we are going to use the python library scapy to craft packets with specific information to ensure we trigger the alert with the information we want: Craft the layer 2 information. Then tune your IDS rulesets. 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. For example, suppose that we want to modify SID 2100498 and replace any instances of returned root with returned root test. This directory stores the firewall rules specific to your grid. > To unsubscribe from this topic . A tag already exists with the provided branch name. 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. From the Command Line. However, generating custom traffic to test the alert can sometimes be a challenge. 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. 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? You received this message because you are subscribed to the Google Groups "security-onion" group. 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. By default, only the analyst hostgroup is allowed access to the nginx ports. When you purchase products and services from us, you're helping to fund development of Security Onion! Adding local rules in Security Onion is a rather straightforward process. These non-manager nodes are referred to as salt minions. For example, consider the following rules that reference the ET.MSSQL flowbit. These non-manager nodes are referred to as salt minions. Naming convention: The collection of server processes has a server name separate from the hostname of the box. 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. In a distributed deployment, the manager node controls all other nodes via salt. Any pointers would be appreciated. For more information, please see https://docs.saltproject.io/en/latest/topics/troubleshooting/yaml_idiosyncrasies.html. You can see that we have an alert with the IP addresses we specified and the TCP ports we specified. Our appliances will save you and your team time and resources, allowing you to focus on keeping your organization secure. . Copyright 2023 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. Please note! All alerts are viewable in Alerts, Dashboards, Hunt, and Kibana. Once logs are generated by network sniffing processes or endpoints, where do they go? /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. If you need to increase this delay, it can be done using the salt:minion:service_start_delay pillar. Security Onion includes best-of-breed free and open tools including Suricata, Zeek, Wazuh, the Elastic Stack and many others. 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. Run rule-update (this will merge local.rules into downloaded.rules, update. Full Name. 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. In Security Onion, locally created rules are stored in /opt/so/rules/nids/local.rules. After viewing your redacted sostat it seems that the ICMP and UDP rules are triggering: Are you using SO with in a VM? Please provide the output of sostat-redacted, attaching as a plain text file, or by using a service like Pastebin.com. /opt/so/saltstack/local/salt/firewall/portgroups.local.yaml defines custom port groups. See above for suppress examples. Check your syslog-ng configuration for the name of the local log source ("src" is used on SUSE systems). Host groups are similar to port groups but for storing lists of hosts that will be allowed to connect to the associated port groups. The set of processes includes sguild, mysql, and optionally the Elastic stack (Elasticsearch, Logstash, Kibana) and Curator. Security Onion offers the following choices for rulesets to be used by Snort/Suricata: ET Open optimized for Suricata, but available for Snort as well free For more information, see: https://rules.emergingthreats.net/open/ ET Pro (Proofpoint) optimized for Suricata, but available for Snort as well rules retrievable as released Set anywhere from 5 to 12 in the local_rules Kevin. 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 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. Identification. There isnt much in here other than anywhere, dockernet, localhost and self. Add the following to the minions sls file located at. 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. Apply the firewall state to the node, or wait for the highstate to run for the changes to happen automatically. There are two directories that contain the yaml files for the firewall configuration. One thing you can do with it (and the one that most people are interested in) is to configure it for IDS mode. 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. Now we have to build the association between the host group and the syslog port group and assign that to our sensor node. It . Security Onion includes best-of-breed free and open tools including Suricata, Zeek, Wazuh, the Elastic Stack and many others. 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. 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. However, generating custom traffic to test the alert can sometimes be a challenge. Revision 39f7be52. Backing up current local_rules.xml file. 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). You may want to bump the SID into the 90,000,000 range and set the revision to 1. 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. Run so-rule without any options to see the help output: We can use so-rule to modify an existing NIDS rule. On Thursday, June 15, 2017 at 5:06:51 PM UTC+5:30, Wes wrote: Is it simply not triggering, or causing an error? 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). in Sguil? Security Onion offers the following choices for rulesets to be used by Suricata. If you are on a large network, you may need to do additional tuning like pinning processes to CPU cores. Within 15 minutes, Salt should then copy those rules into /opt/so/rules/nids/local.rules. Have you tried something like this, in case you are not getting traffic to $HOME_NET? Adding local rules in Security Onion is a rather straightforward process. 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 Start creating a file for your rule. 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. alert icmp any any -> any any (msg: "ICMP Testing"; sid:1000001; rev:1;). To get the best performance out of Security Onion, youll want to tune it for your environment. Now that we have a signature that will generate alerts a little more selectively, we need to disable the original signature.