security onion local rules

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). 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. 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. idstools may seem like it is ignoring your disabled rules request if you try to disable a rule that has flowbits set. 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. Have you tried something like this, in case you are not getting traffic to $HOME_NET? Identification. Default YARA rules are provided from Florian Roths signature-base Github repo at https://github.com/Neo23x0/signature-base. Generate some traffic to trigger the alert. Local pillar file: This is the pillar file under /opt/so/saltstack/local/pillar/. . To configure syslog for Security Onion: Stop the Security Onion service. Pillars are a Saltstack concept, formatted typically in YAML, that can be used to parameterize states via templating. 4. More information on each of these topics can be found in this section. To verify the Snort version, type in snort -Vand hit Enter. Salt is a new approach to infrastructure management built on a dynamic communication bus. 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. Start by creating Berkeley Packet Filters (BPFs) to ignore any traffic that you don't want your network sensors to process. To add local YARA rules, create a directory in /opt/so/saltstack/local/salt/strelka/rules, for example localrules. Tracking. In order to apply the threshold to all nodes, place the pillar in /opt/so/saltstack/local/pillar/global.sls. In this file, the idstools section has a modify sub-section where you can add your modifications. It is located at /opt/so/saltstack/local/pillar/global.sls. alert icmp any any -> any any (msg: "ICMP Testing"; sid:1000001; rev:1;). 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. Copyright 2023 Escalate local privileges to root level. Security Onion Layers Ubuntu based OS Snort, Suricata Snorby Bro Sguil Squert As you can see I have the Security Onion machine connected within the internal network to a hub. 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. 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. Files here should not be modified as changes would be lost during a code update. After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. Port groups are a way of grouping together ports similar to a firewall port/service alias. Boot the ISO and run through the installer. 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. You can see that we have an alert with the IP addresses we specified and the TCP ports we specified. 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. Can anyone tell me > > > > what I've done wrong please? Double-click the Setup script on the Desktop and follow the prompts to configure and start the Sguil processes. If . 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. Finally, from the manager, update the config on the remote node: You can manage threshold entries for Suricata using Salt pillars. This error now occurs in the log due to a change in the exception handling within Salts event module. It incorporates NetworkMiner, CyberChef, Squert, Sguil, Wazuh, Bro, Suricata, Snort, Kibana, Logstash, Elasticsearch, and numerous other security onion tools. This directory stores the firewall rules specific to your grid. 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 example, consider the following rules that reference the ET.MSSQL flowbit. All alerts are viewable in Alerts, Dashboards, Hunt, and Kibana. If you would like to pull in NIDS rules from a MISP instance, please see: 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. 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. 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. For more information, please see https://docs.saltproject.io/en/latest/topics/troubleshooting/yaml_idiosyncrasies.html. and dont forget that the end is a semicolon and not a colon. Tried as per your syntax, but still issue persists. If you are on a large network, you may need to do additional tuning like pinning processes to CPU cores. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Salt sls files are in YAML format. A tag already exists with the provided branch name. Was this translation helpful? 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). "; reference: url,http://holisticinfosec.blogspot.com/2011/12/choose-2011-toolsmith-tool-of-year.html; content: "toolsmith"; flow:to_server; nocase; sid:9000547; metadata:policy security-ips; rev:1). in Sguil? If you want to tune Wazuh HIDS alerts, please see the Wazuh section. /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. https://docs.securityonion.net/en/2.3/local-rules.html?#id1. One thing you can do with it (and the one that most people are interested in) is to configure it for IDS mode. =========================================================================Top 50 All time Sguil Events=========================================================================Totals GenID:SigID Signature1686 1:1000003 UDP Testing Rule646 1:1000001 ICMP Testing Rule2 1:2019512 ET POLICY Possible IP Check api.ipify.org1 1:2100498 GPL ATTACK_RESPONSE id check returned rootTotal2335, =========================================================================Last update=========================================================================. Adding local rules in Security Onion is a rather straightforward process. 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 built the rule correctly, then snort should be back up and running. This will add the host group to, Add the desired IPs to the host group. 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/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. Do you see these alerts in Squert or ELSA? 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. Now that we have a signature that will generate alerts a little more selectively, we need to disable the original signature. 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. Please keep this value below 90 seconds otherwise systemd will reach timeout and terminate the service. You can add Wazuh HIDS rules in /opt/so/rules/hids/local_rules.xml. . Are you sure you want to create this branch? 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. I went ahead and put in the below rules under /etc/nsm/local.rules and ran the rule-update command. The error can be ignored as it is not an indication of any issue with the minions. There are two directories that contain the yaml files for the firewall configuration. Youll need to ensure the first of the two properly escapes any characters that would be interpreted by regex. You received this message because you are subscribed to the Google Groups "security-onion" group. You can read more about this at https://redmine.openinfosecfoundation.org/issues/4377. This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. Check out our NIDS tuning video at https://youtu.be/1jEkFIEUCuI! Adding Your Own Rules . How are they stored? If this is a distributed deployment, edit local.rules on your master server and it will replicate to your sensors. For some alerts, your understanding of your own network and the business being transacted across it will be the deciding factor. Please note that Suricata 6 has a 64-character limitation on the IP field in a threshold. 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) Answered by weslambert on Dec 15, 2021. Start by creating Berkeley Packet Filters (BPFs) to ignore any traffic that you dont want your network sensors to process. Security Onion a free and open platform for intrusion detection, enterprise security monitoring, and log management. IPS Policy Revision 39f7be52. > To unsubscribe from this topic . 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. Reboot into your new Security Onion installation and login using the username/password you specified in the previous step. 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. For a Security Onion client, you should dedicate at least 2GB RAM, but ideally 4GB if possible. After viewing your redacted sostat it seems that the ICMP and UDP rules are triggering: Are you using SO with in a VM? 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. This writeup contains a listing of important Security Onion files and directories. Long-term you should only run the rules necessary for > your environment. There isnt much in here other than anywhere, dockernet, localhost and self. You can see that we have an alert with the IP addresses we specified and the TCP ports we specified. The signature id (SID) must be unique. 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. Introduction Adding local rules in Security Onion is a rather straightforward process. 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. Within 15 minutes, Salt should then copy those rules into /opt/so/rules/nids/local.rules. 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). Our products include both the Security Onion software and specialized hardware appliances that are built and tested to run Security Onion. Apply the firewall state to the node, or wait for the highstate to run for the changes to happen automatically. 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. Please update your bookmarks. As shown above, we edit the minion pillar and add the SID to the idstools - sids - disabled section. I've just updated the documentation to be clearer. Copyright 2023 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 signed in with another tab or window. 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. 1. If you need to increase this delay, it can be done using the salt:minion:service_start_delay pillar. See above for suppress examples. Enter the following sample in a line at a time. 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. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. 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, 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! Security Onion. You could try testing a rule . If you need to manually update your rules, you can run the following on your manager node: If you have a distributed deployment and you update the rules on your manager node, then those rules will automatically replicate from the manager node to your sensors within 15 minutes. Write your rule, see Rules Format and save it. When configuring network firewalls for distributed deployments, youll want to ensure that nodes can connect as shown below. It is now read-only. > > => I do not know how to do your guilde line. 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. 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. 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. Open /etc/nsm/rules/local.rules using your favorite text editor. That's what we'll discuss in this section. The second only needs the $ character escaped to prevent bash from treating that as a variable. When you run so-allow or so-firewall, it modifies this file to include the IP provided in the proper hostgroup. Where is it that you cannot view them? However, generating custom traffic to test the alert can sometimes be a challenge. Revision 39f7be52. Start creating a file for your rule. Adding Local Rules Security Onion 2.3 documentation Docs Tuning Adding Local Rules Edit on GitHub Adding Local Rules NIDS You can add NIDS rules in /opt/so/saltstack/local/salt/idstools/local.rules on your manager. 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. These non-manager nodes are referred to as salt minions. While Vanderburgh County was the seventh-largest county in 2010 population with 179,703 people, it is also the eighth-smallest county in area in Indiana and the smallest in southwestern Indiana, covering only 236 square miles (610 km2). Once logs are generated by network sniffing processes or endpoints, where do they go? Revision 39f7be52. Adding local rules in Security Onion is a rather straightforward process. Also ensure you run rule-update on the machine. Security Onion generates a lot of valuable information for you the second you plug it into a TAP or SPAN port. The county seat is in Evansville. Previously, in the case of an exception, the code would just pass. Security Onion is a free and open platform for threat hunting, enterprise security monitoring, and log management. Security Onion uses idstools to download new signatures every night and process them against a set list of user generated configurations. Security Onion includes best-of-breed free and open tools including Suricata, Zeek, Wazuh, the Elastic Stack and many others. This directory contains the default firewall rules. 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 ->. Next, run so-yara-update to pull down the rules. Modifying these values outside of so-allow or so-firewall could lead to problems accessing your existing hosts. Run rule-update (this will merge local.rules into downloaded.rules, update. This repository has been archived by the owner on Apr 16, 2021. 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. 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. 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, From the Command Line. After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. . After select all interfaces also ICMP logs not showing in sguil. 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. 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 . Within 15 minutes, Salt should then copy those rules into /opt/so/rules/nids/local.rules. 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. 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. 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. /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. Backing up current downloaded.rules file before it gets overwritten. 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. 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. If so, then tune the number of AF-PACKET workers for sniffing processes. You can learn more about snort and writing snort signatures from the Snort Manual. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. 2. Security. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. You can find the latest version of this page at: https://securityonion.net/docs/AddingLocalRules. These non-manager nodes are referred to as salt minions. You may want to bump the SID into the 90,000,000 range and set the revision to 1. Security Onion is a platform that allows you to monitor your network for security alerts. idstools helpfully resolves all of your flowbit dependencies, and in this case, is re-enabling that rule for you on the fly. 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. Set anywhere from 5 to 12 in the local_rules Kevin. Check your syslog-ng configuration for the name of the local log source ("src" is used on SUSE systems). This is located at /opt/so/saltstack/local/pillar/minions/.sls. 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. Finally, run so-strelka-restart to allow Strelka to pull in the new rules. 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. Our documentation has moved to https://securityonion.net/docs/. A. 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. MISP Rules. 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. When editing these files, please be very careful to respect YAML syntax, especially whitespace. In syslog-ng, the following configuration forwards all local logs to Security Onion. If you right click on the, You can learn more about snort and writing snort signatures from the. Adding local rules in Security Onion is a rather straightforward process. 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). Now we have to build the association between the host group and the syslog port group and assign that to our sensor node. However, the exception is now logged. Another consideration is whether or not the traffic is being generated by a misconfigured piece of equipment. Inside of /opt/so/saltstack/local/salt/strelka/rules/localrules, add your YARA rules. /opt/so/saltstack/default/salt/firewall/portgroups.yaml is where the default port groups are defined. Ingest. 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,. Cannot retrieve contributors at this time. /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. Full Name. Revision 39f7be52.

Sonja Farak Therapy Notes, Jamie Perkins Swimmer, Wilson Middle School Students, Katherine Johnson Middle School Staff, Sweet Potato Tamales Bobby Flay Recipe, Articles S