security onion local rules
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. And when I check, there are no rules there. 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. 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. For example, suppose we want to disable SID 2100498. When editing these files, please be very careful to respect YAML syntax, especially whitespace. 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). Security Onion has Snort built in and therefore runs in the same instance. However, generating custom traffic to test the alert can sometimes be a challenge. Start by creating Berkeley Packet Filters (BPFs) to ignore any traffic that you don't want your network sensors to process. /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. Another consideration is whether or not the traffic is being generated by a misconfigured piece of equipment. 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. The set of processes includes sguild, mysql, and optionally the Elastic stack (Elasticsearch, Logstash, Kibana) and Curator. Security Onion is a free and open source platform for threat hunting, network security monitoring, and log management. You may want to bump the SID into the 90,000,000 range and set the revision to 1. In Security Onion, locally created rules are stored in /opt/so/rules/nids/local.rules. 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. Try checking /var/log/nsm/hostname-interface/snortu-1.log for clues and please post the exact rule syntax you are attempting to use. There are many ways to achieve age regression, but the three primary methods are: Botox. epic charting system training Was this translation helpful? Open /etc/nsm/rules/local.rules using your favorite text editor. Find Age Regression Discord servers and make new friends! We've been teaching Security Onion classes and providing Professional Services since 2014. After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. 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). At those times, it can be useful to query the database from the commandline. You could try testing a rule . ELSA? 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. 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 This is located at /opt/so/saltstack/local/pillar/minions/.sls. You need to configure Security Onion to send syslog so that InsightIDR can ingest it. 5. Salt sls files are in YAML format. That's what we'll discuss in this section. lawson cedars. 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. . 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, 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. Cannot retrieve contributors at this time. 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). In order to apply the threshold to all nodes, place the pillar in /opt/so/saltstack/local/pillar/global.sls. /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. 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. 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 This writeup contains a listing of important Security Onion files and directories. Hi @Trash-P4nda , I've just updated the documentation to be clearer. 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. To get the best performance out of Security Onion, youll want to tune it for your environment. Tried as per your syntax, but still issue persists. This will add the host group to, Add the desired IPs to the host group. All node types are added to the minion host group to allow Salt communication. Default pillar file: This is the pillar file located under /opt/so/saltstack/default/pillar/. There isnt much in here other than anywhere, dockernet, localhost and self. /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. In the image below, we can see how we define some rules for an eval node. Logs. Add the following to the minions sls file located at. As shown above, we edit the minion pillar and add the SID to the idstools - sids - disabled section. This first sub-section will discuss network firewalls outside of Security Onion. Let's add a simple rule that will alert on the detection of a string in a tcp session: Run rule-update (this will merge local.rules into downloaded.rules, update sid-msg.map, and restart processes as necessary): If you built the rule correctly, then Snort/Suricata should be back up and running. Modifying these values outside of so-allow or so-firewall could lead to problems accessing your existing hosts. 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 More information on each of these topics can be found in this section. On Thursday, June 15, 2017 at 5:06:51 PM UTC+5:30, Wes wrote: Is it simply not triggering, or causing an error? You can do so via the command line using curl: Alternatively, you could also test for additional hits with a utility called tmNIDS, running the tool in interactive mode: If everything is working correctly, you should see a corresponding alert (GPL ATTACK_RESPONSE id check returned root) in Alerts, Dashboards, Hunt, or Kibana. After viewing your redacted sostat it seems that the ICMP and UDP rules are triggering: Are you using SO with in a VM? 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. Security Onion a free and open platform for intrusion detection, enterprise security monitoring, and log management. Now that we have a signature that will generate alerts a little more selectively, we need to disable the original signature. This section will cover both network firewalls outside of Security Onion and the host-based firewall built into Security Onion. 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. You may want to bump the SID into the 90,000,000 range and set the revision to 1. Check out our NIDS tuning video at https://youtu.be/1jEkFIEUCuI! When you purchase products and services from us, you're helping to fund development of Security Onion! > > > > > > > > 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. If . Security Onion. Copyright 2023 Tracking. Youll need to ensure the first of the two properly escapes any characters that would be interpreted by regex. For more information about Salt, please see https://docs.saltstack.com/en/latest/. This error now occurs in the log due to a change in the exception handling within Salts event module. Security Onion offers the following choices for rulesets to be used by Suricata. Introduction Adding local rules in Security Onion is a rather straightforward process. The error can be ignored as it is not an indication of any issue with the minions. 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. When I run sostat. Started by Doug Burks, and first released in 2009, Security Onion has. You received this message because you are subscribed to the Google Groups "security-onion" group. https://docs.securityonion.net/en/2.3/local-rules.html?#id1. Local pillar file: This is the pillar file under /opt/so/saltstack/local/pillar/. Security Onion is a platform that allows you to monitor your network for security alerts. All the following will need to be run from the manager. Start by creating Berkeley Packet Filters (BPFs) to ignore any traffic that you dont want your network sensors to process. Please provide the output of sostat-redacted, attaching as a plain text file, or by using a service like Pastebin.com. You signed in with another tab or window. Answered by weslambert on Dec 15, 2021. Revision 39f7be52. 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. Please note if you are using a ruleset that enables an IPS policy in /etc/nsm/pulledpork/pulledpork.conf, your local rules will be disabled. In 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. 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. We offer both training and support for Security Onion. /opt/so/saltstack/default/salt/firewall/hostgroups.yaml is where the default hostgroups are defined. Interested in discussing how our products and services can help your organization? You can add Wazuh HIDS rules in /opt/so/rules/hids/local_rules.xml. Reboot into your new Security Onion installation and login using the username/password you specified in the previous step. How are they stored? To configure syslog for Security Onion: Stop the Security Onion service. These non-manager nodes are referred to as salt minions. This wiki is no longer maintained. However, generating custom traffic to test the alert can sometimes be a challenge. 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 . It . /opt/so/saltstack/local/salt/firewall/portgroups.local.yaml defines custom port groups. 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. For more information, please see https://docs.saltproject.io/en/latest/topics/troubleshooting/yaml_idiosyncrasies.html. 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! 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. 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. For a quick primer on flowbits, see https://blog.snort.org/2011/05/resolving-flowbit-dependancies.html. Security Onion Layers Ubuntu based OS Snort, Suricata Snorby Bro Sguil Squert 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. in Sguil? 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. Add the following to the sensor minion pillar file located at. The territories controlled by the ROC consist of 168 islands, with a combined area of 36,193 square . https://securityonion.net/docs/AddingLocalRules. We created and maintain Security Onion, so we know it better than anybody else. 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.
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