security onion local rules

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. Revision 39f7be52. To unsubscribe from this group and stop receiving emails from it, send an email to Long-term you should only run the rules necessary for > your environment. If this is a distributed deployment, edit local.rules on your master server and it will replicate to your sensors. Now we have to build the association between the host group and the syslog port group and assign that to our sensor node. From Salt is a core component of Security Onion 2 as it manages all processes on all nodes. For more information about Salt, please see Here are some of the items that can be customized with pillar settings: Currently, the salt-minion service startup is delayed by 30 seconds. Security Onion has Snort built in and therefore runs in the same instance. 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, If you want to tune Wazuh HIDS alerts, please see the Wazuh section. Start by creating Berkeley Packet Filters (BPFs) to ignore any traffic that you don't want your network sensors to process. In 2008, Doug Burks started working on Security Onion, a Linux distribution for intrusion detection, network security monitoring, and log management. Adding Your Own 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. Another consideration is whether or not the traffic is being generated by a misconfigured piece of equipment. Default pillar file: This is the pillar file located under /opt/so/saltstack/default/pillar/. Adding local rules in Security Onion is a rather straightforward process. Security Onion is an open-source and free Linux distribution for log management, enterprise security monitoring, and intrusion detection. 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 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. 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. If you would like to pull in NIDS rules from a MISP instance, please see the MISP Rules section. 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. Logs. Open /etc/nsm/rules/local.rules using your favorite text editor. (Signature files for Security Onion containers) (Container downloads) (Emerging Threats IDS rules) (Emerging Threats IDS open rules) (Paid Snort Talos ruleset) (Strelka and Sigma rules updates) 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. Our documentation has moved to If you need to increase this delay, it can be done using the salt:minion:service_start_delay pillar. Answered by weslambert on Dec 15, 2021. Our products include both the Security Onion software and specialized hardware appliances that are built and tested to run Security Onion. You can use salts to verify that all your nodes are up: Similarly, you can use salts to execute a command on all your nodes at once. Diagnostic logs can be found in /opt/so/log/salt/. You can read more about this at Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. When you purchase products and services from us, you're helping to fund development of Security Onion! When configuring network firewalls for Internet-connected deployments (non-Airgap), youll want to ensure that the deployment can connect outbound to the following: In the case of a distributed deployment, you can configure your nodes to pull everything from the manager so that only the manager requires Internet access. > To unsubscribe from this topic . 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. 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. alert icmp any any -> any any (msg: "ICMP Testing"; sid:1000001; rev:1;). Alternatively, run salt -G 'role:so-sensor' "so-strelka-restart" to restart Strelka on all sensors at once. Youll need to ensure the first of the two properly escapes any characters that would be interpreted by regex. 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. 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. You may want to bump the SID into the 90,000,000 range and set the revision to 1. You could try testing a rule . This wiki is no longer maintained. 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). IPS Policy Find Age Regression Discord servers and make new friends! The server is also responsible for ruleset management. For example, if you had a web server you could include 80 and 443 tcp into an alias or in this case a port group. Please note that Suricata 6 has a 64-character limitation on the IP field in a threshold. To verify the Snort version, type in snort -Vand hit Enter. Security Onion includes best-of-breed free and open tools including Suricata, Zeek, Wazuh, the Elastic Stack and many others. Security. 3. You signed in with another tab or window. All node types are added to the minion host group to allow Salt communication. 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. Nodes will be configured to pull from but this URL does not actually exist on the Internet, it is just a special address for the manager proxy. jq; so-allow; so-elastic-auth; so . 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). Check out our NIDS tuning video at! These non-manager nodes are referred to as salt minions. 5. Inside of /opt/so/saltstack/local/salt/strelka/rules/localrules, add your YARA rules. 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 Where is it that you cannot view them? Please provide the output of sostat-redacted, attaching as a plain text file, or by using a service like Can anyone tell me > > > > what I've done wrong please? Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. You can learn more about snort and writing snort signatures from the Snort Manual. You received this message because you are subscribed to the Google Groups "security-onion" group. Global pillar file: This is the pillar file that can be used to make global pillar assignments to the nodes. This first sub-section will discuss network firewalls outside of Security Onion. 2. 7.2. We've been teaching Security Onion classes and providing Professional Services since 2014. This repository has been archived by the owner on Apr 16, 2021. In a distributed deployment, the manager node controls all other nodes via salt. Revision 39f7be52. Edit the /opt/so/rules/nids/local.rules file using vi or your favorite text editor: Paste the rule. Files here should not be modified as changes would be lost during a code update. 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 ->. Add the following to the minions sls file located at. As you can see I have the Security Onion machine connected within the internal network to a hub. Any line beginning with "#" can be ignored as it is a comment. You signed in with another tab or window. 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. 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. There are two directories that contain the yaml files for the firewall configuration. 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 Onion uses idstools to download new signatures every night and process them against a set list of user generated configurations. How are they stored? For more information, please see Before You Begin. Security Onion is a platform that allows you to monitor your network for security alerts. When you run so-allow or so-firewall, it modifies this file to include the IP provided in the proper hostgroup. One thing you can do with it (and the one that most people are interested in) is to configure it for IDS mode. 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 I run sostat. and dont forget that the end is a semicolon and not a colon. By default, only the analyst hostgroup is allowed access to the nginx ports. 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. It incorporates NetworkMiner, CyberChef, Squert, Sguil, Wazuh, Bro, Suricata, Snort, Kibana, Logstash, Elasticsearch, and numerous other security onion tools. 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. These non-manager nodes are referred to as salt minions. The signature id (SID) must be unique. 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: ET Pro (Proofpoint) optimized for Suricata, but available for Snort as well rules retrievable as released If you built the rule correctly, then snort should be back up and running. Security Onion generates a lot of valuable information for you the second you plug it into a TAP or SPAN port. In Security Onion, locally created rules are stored in /opt/so/rules/nids/local.rules. You need to configure Security Onion to send syslog so that InsightIDR can ingest it. (Alternatively, you can press Ctrl+Alt+T to open a new shell.) /opt/so/saltstack/local/pillar/minions/,,,,, 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. 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 For a Security Onion client, you should dedicate at least 2GB RAM, but ideally 4GB if possible. 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. In the configuration window, select the relevant form of Syslog - here, it's Syslog JSON - and click. Salt sls files are in YAML format. Security Onion offers the following choices for rulesets to be used by Suricata. Escalate local privileges to root level. Been looking to add some custom YARA rules and have been following the docs however I'm a little confused. From the Command Line. Enter the following sample in a line at a time. These are the files that will need to be changed in order to customize nodes. /opt/so/saltstack/default/salt/firewall/portgroups.yaml is where the default port groups are defined. the rule is missing a little syntax, maybe try: alert icmp any any -> $HOME_NET any (msg:"ICMP Testing"; sid:1000001; rev:1;). The set of processes includes sguild, mysql, and optionally the Elastic stack (Elasticsearch, Logstash, Kibana) and Curator. Once logs are generated by network sniffing processes or endpoints, where do they go? In syslog-ng, the following configuration forwards all local logs to Security Onion. If you do not see this alert, try checking to see if the rule is enabled in /opt/so/rules/nids/all.rules: Rulesets come with a large number of rules enabled (over 20,000 by default). 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 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,. This is an advanced case and you most likely wont never need to modify these files. =========================================================================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=========================================================================.

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