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. Please provide the output of sostat-redacted, attaching as a plain text file, or by using a service like Pastebin.com. 3. Security Onion is a intrusion detection and network monitoring tool. Escalate local privileges to root level. Revision 39f7be52. Revision 39f7be52. You signed in with another tab or window. 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. Though each engine uses its own severity level system, Security Onion converts that to a standardized alert severity: event.severity: 4 ==> event.severity_label: critical, event.severity: 3 ==> event.severity_label: high, event.severity: 2 ==> event.severity_label: medium, event.severity: 1 ==> event.severity_label: low. so-rule allows you to disable, enable, or modify NIDS rules. 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. 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). 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. Then tune your IDS rulesets. This error now occurs in the log due to a change in the exception handling within Salts event module. This section will cover both network firewalls outside of Security Onion and the host-based firewall built into Security Onion. Open /etc/nsm/rules/local.rules using your favorite text editor. 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. Security Onion offers the following choices for rulesets to be used by Suricata. This repository has been archived by the owner on Apr 16, 2021. This wiki is no longer maintained. Write your rule, see Rules Format and save it. The remainder of this section will cover the host firewall built into Security Onion. 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. After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. A. Revision 39f7be52. 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). 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. 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. If you want to tune Wazuh HIDS alerts, please see the Wazuh section. Assuming you have Internet access, Security Onion will automatically update your NIDS rules on a daily basis. The territories controlled by the ROC consist of 168 islands, with a combined area of 36,193 square . Within 15 minutes, Salt should then copy those rules into /opt/so/rules/nids/local.rules. Revision 39f7be52. Some node types get their IP assigned to multiple host groups. Enter the following sample in a line at a time. Please update your bookmarks. This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. Adding Your Own 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. . In Security Onion, locally created rules are stored in /opt/so/rules/nids/local.rules. Global pillar file: This is the pillar file that can be used to make global pillar assignments to the nodes. If you are on a large network, you may need to do additional tuning like pinning processes to CPU cores. 41 - Network Segmentation, VLANs, and Subnets. Security Onion Layers Ubuntu based OS Snort, Suricata Snorby Bro Sguil Squert Salt sls files are in YAML format. 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. Adding local rules in Security Onion is a rather straightforward process. 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. Check out our NIDS tuning video at https://youtu.be/1jEkFIEUCuI! If you would like to pull in NIDS rules from a MISP instance, please see: This directory stores the firewall rules specific to your grid. Salt is a new approach to infrastructure management built on a dynamic communication bus. Inside of /opt/so/saltstack/local/salt/strelka/rules/localrules, add your YARA rules. Security Onion has Snort built in and therefore runs in the same instance. Find Age Regression Discord servers and make new friends! Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. Was this translation helpful? For more information about Salt, please see https://docs.saltstack.com/en/latest/. If you would like to pull in NIDS rules from a MISP instance, please see the MISP Rules section. idstools may seem like it is ignoring your disabled rules request if you try to disable a rule that has flowbits set. After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. Security Onion includes best-of-breed free and open tools including Suricata, Zeek, Wazuh, the Elastic Stack and many others. 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. You can add Wazuh HIDS rules in /opt/so/rules/hids/local_rules.xml. If you would like to create a rule yourself and use it with Suricata, this guide might be helpful. 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. 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! Full Name. You may want to bump the SID into the 90,000,000 range and set the revision to 1. For more information, please see https://docs.saltproject.io/en/latest/topics/troubleshooting/yaml_idiosyncrasies.html. 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. (Archived 1/22) Tuning NIDS Rules in Security Onion Security Onion 7.5K subscribers 48 Dislike Share 1,465 views Dec 22, 2021 This video has been archived as of January 2022 - the latest. There are many ways to achieve age regression, but the three primary methods are: Botox. Start creating a file for your rule. Security. If you pivot from that alert to the corresponding pcap you can verify the payload we sent. Local pillar file: This is the pillar file under /opt/so/saltstack/local/pillar/. Introduction Adding local rules in Security Onion is a rather straightforward process. Add the following to the sensor minion pillar file located at. Start by creating Berkeley Packet Filters (BPFs) to ignore any traffic that you don't want your network sensors to 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. /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 a free and open platform for intrusion detection, enterprise security monitoring, and log management. You can find the latest version of this page at: https://securityonion.net/docs/AddingLocalRules. You can see that we have an alert with the IP addresses we specified and the TCP ports we specified. 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. Nodes will be configured to pull from repocache.securityonion.net but this URL does not actually exist on the Internet, it is just a special address for the manager proxy. Security Onion is a free and open platform for threat hunting, enterprise security monitoring, and log management. 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. More information on each of these topics can be found in this section. ELSA? Salt can be used for data-driven orchestration, remote execution for any infrastructure, configuration management for any app stack, and much more. See above for suppress examples. Open /etc/nsm/rules/local.rules using your favorite text editor. 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. 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. 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 . In syslog-ng, the following configuration forwards all local logs to Security Onion. This will add the host group to, Add the desired IPs to the host group. 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. Firewall Requirements Salt minions must be able to connect to the manager node on ports 4505/tcp and 4506/tcp: 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. 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 signature id (SID) must be unique. Security Onion uses idstools to download new signatures every night and process them against a set list of user generated configurations. 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. By default, only the analyst hostgroup is allowed access to the nginx ports. Reboot into your new Security Onion installation and login using the username/password you specified in the previous step. However, generating custom traffic to test the alert can sometimes be a challenge. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. Double-click the Setup script on the Desktop and follow the prompts to configure and start the Sguil processes. If it is, then the most expedient measure may be to resolve the misconfiguration and then reinvestigate tuning. Custom rules can be added to the local.rules file Rule threshold entries can . Please keep this value below 90 seconds otherwise systemd will reach timeout and terminate the service. To get the best performance out of Security Onion, youll want to tune it for your environment. For a quick primer on flowbits, see https://blog.snort.org/2011/05/resolving-flowbit-dependancies.html.