If you want to apply the threshold to a single node, place the pillar in /opt/so/saltstack/local/pillar/minions/.sls. Tuning NIDS Rules in Security Onion - YouTube 0:00 / 15:12 Tuning NIDS Rules in Security Onion 1,511 views Jan 10, 2022 This video shows you how to tune Suricata NIDS rules in. Backing up current downloaded.rules file before it gets overwritten. Firewall Requirements Salt minions must be able to connect to the manager node on ports 4505/tcp and 4506/tcp: Please review the Salt section to understand pillars and templates. 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. Copyright 2023 Adding Your Own Rules . 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. Adding local rules in Security Onion is a rather straightforward process. Use one of the following examples in your console/terminal window: sudo nano local.rules sudo vim local.rules. For example, suppose we want to disable SID 2100498. 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. When editing these files, please be very careful to respect YAML syntax, especially whitespace. For a Security Onion client, you should dedicate at least 2GB RAM, but ideally 4GB if possible. Find Age Regression Discord servers and make new friends! After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. This error now occurs in the log due to a change in the exception handling within Salts event module. Assuming you have Internet access, Security Onion will automatically update your NIDS rules on a daily basis. Security. We created and maintain Security Onion, so we know it better than anybody else. 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,. You can add NIDS rules in /opt/so/saltstack/local/salt/idstools/local.rules on your manager. There are two directories that contain the yaml files for the firewall configuration. 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. /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. Are you sure you want to create this branch? . 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! Manager of Support and Professional Services. 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) You received this message because you are subscribed to the Google Groups "security-onion" group. When you run so-allow or so-firewall, it modifies this file to include the IP provided in the proper hostgroup. Identification. These are the files that will need to be changed in order to customize nodes. 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. 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. Our appliances will save you and your team time and resources, allowing you to focus on keeping your organization secure. 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. 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. Introduction Adding local rules in Security Onion is a rather straightforward process. 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. Please update your bookmarks. You need to configure Security Onion to send syslog so that InsightIDR can ingest it. 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. These non-manager nodes are referred to as salt minions. If you pivot from that alert to the corresponding pcap you can verify the payload we sent. Generate some traffic to trigger the alert. Salt sls files are in YAML format. https://securityonion.net/docs/AddingLocalRules. Check your syslog-ng configuration for the name of the local log source ("src" is used on SUSE systems). Here are some of the items that can be customized with pillar settings: Currently, the salt-minion service startup is delayed by 30 seconds. 7.2. The county seat is in Evansville. 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. Interested in discussing how our products and services can help your organization? 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. Security Onion generates a lot of valuable information for you the second you plug it into a TAP or SPAN port. We offer both training and support for Security Onion. Can anyone tell me > > > > what I've done wrong please? 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. 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. 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. If this is a distributed deployment, edit local.rules on your master server and it will replicate to your sensors. To get the best performance out of Security Onion, youll want to tune it for your environment. . In a distributed deployment, the manager node controls all other nodes via salt. /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. 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 read more about this at https://redmine.openinfosecfoundation.org/issues/4377. This is an advanced case and you most likely wont never need to modify these files. Cannot retrieve contributors at this time. When you purchase products and services from us, you're helping to fund development of Security Onion! 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. For some alerts, your understanding of your own network and the business being transacted across it will be the deciding factor. Copyright 2023 5. Long-term you should only run the rules necessary for > your environment. Finally, run so-strelka-restart to allow Strelka to pull in the new rules. For example, if you include a bad custom snort rule with incorrect syntax, the snort engine will fail . 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, This directory stores the firewall rules specific to your grid. 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. I went ahead and put in the below rules under /etc/nsm/local.rules and ran the rule-update command. To add local YARA rules, create a directory in /opt/so/saltstack/local/salt/strelka/rules, for example localrules. Some node types get their IP assigned to multiple host groups. 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. A node that has a port group and host group association assigned to it will allow those hosts to connect to those ports on that node. Ingest. After select all interfaces also ICMP logs not showing in sguil. However, generating custom traffic to test the alert can sometimes be a challenge. 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 If so, then tune the number of AF-PACKET workers for sniffing processes. 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. 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. 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. Security Onion is a platform that allows you to monitor your network for security alerts. /opt/so/saltstack/default/salt/firewall/hostgroups.yaml is where the default hostgroups are defined. lawson cedars. 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. Set anywhere from 5 to 12 in the local_rules Kevin. 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. These non-manager nodes are referred to as salt minions. After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. IPS Policy /opt/so/saltstack/default/salt/firewall/portgroups.yaml is where the default port groups are defined. . And when I check, there are no rules there. 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. Backing up current local_rules.xml file. As you can see I have the Security Onion machine connected within the internal network to a hub. Revision 39f7be52. But after I run the rule-update command, no alert is generated in Sguil based on that rule.It was working when I first installed Security Onion. 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). Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. This repository has been archived by the owner on Apr 16, 2021. 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). To enabled them, either revert the policy by remarking the ips_policy line (and run rule-update), or add the policy type to the rules in local.rules. 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. Previously, in the case of an exception, the code would just pass. /opt/so/saltstack/local/salt/firewall/portgroups.local.yaml defines custom port groups. If you would like to pull in NIDS rules from a MISP instance, please see: Adding local rules in Security Onion is a rather straightforward process. Full Name. Generate some traffic to trigger the alert. Salt sls files are in YAML format. This way, you still have the basic ruleset, but the situations in which they fire are altered. Default pillar file: This is the pillar file located under /opt/so/saltstack/default/pillar/. 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? 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. 4. It is located at /opt/so/saltstack/local/pillar/global.sls. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. After viewing your redacted sostat it seems that the ICMP and UDP rules are triggering: Are you using SO with in a VM? You can do the reverse unit conversion from MPa to psi, or enter any two units below:LED MSI Optix G242 24 inch IPS Gaming Monitor - Full HD - 144Hz Refresh Rate - 1ms Response time - Adaptive Sync for Esports (9S6-3BA41T-039) LED MSI OPTIX G272 Gaming Monitor 27" FHD IPS 144HZ 1MS Adaptive Sync (9S6-3CB51T-036) LG 27 FHD IPS 1ms 240Hz G . 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. Copyright 2023 You signed in with another tab or window. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. The set of processes includes sguild, mysql, and optionally the Elastic stack (Elasticsearch, Logstash, Kibana) and Curator. Local pillar file: This is the pillar file under /opt/so/saltstack/local/pillar/. =========================================================================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=========================================================================. 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. From https://docs.saltstack.com/en/latest/: Salt is a core component of Security Onion 2 as it manages all processes on all nodes. Now that we have a signature that will generate alerts a little more selectively, we need to disable the original signature. Add the following to the sensor minion pillar file located at. Host groups are similar to port groups but for storing lists of hosts that will be allowed to connect to the associated port groups. 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. Add the following to the minions sls file located at. This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. 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. In syslog-ng, the following configuration forwards all local logs to Security Onion. Run so-rule without any options to see the help output: We can use so-rule to modify an existing NIDS rule. There are many ways to achieve age regression, but the three primary methods are: Botox. Start by creating Berkeley Packet Filters (BPFs) to ignore any traffic that you dont want your network sensors to process. 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. 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. 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. You signed in with another tab or window. This first sub-section will discuss network firewalls outside of Security Onion. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. 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. All alerts are viewable in Alerts, Dashboards, Hunt, and Kibana. 41 - Network Segmentation, VLANs, and Subnets. I've just updated the documentation to be clearer. You can find the latest version of this page at: https://securityonion.net/docs/AddingLocalRules. If SID 4321 is noisy, you can disable it as follows: From the manager, run the following to update the config: If you want to disable multiple rules at one time, you can use a regular expression, but make sure you enclose the full entry in single quotes like this: We can use so-rule to modify an existing NIDS rule. Please note! so-rule allows you to disable, enable, or modify NIDS rules. We can start by listing any rules that are currently modified: Lets first check the syntax for the add option: Now that we understand the syntax, lets add our modification: Once the command completes, we can verify that our modification has been added: Finally, we can check the modified rule in /opt/so/rules/nids/all.rules: To include an escaped $ character in the regex pattern youll need to make sure its properly escaped. MISP Rules. 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. Cleaning up local_rules.xml backup files older than 30 days. However, generating custom traffic to test the alert can sometimes be a challenge. On Thursday, June 15, 2017 at 5:06:51 PM UTC+5:30, Wes wrote: Is it simply not triggering, or causing an error? 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 https://docs.securityonion.net/en/2.3/local-rules.html?#id1. 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. Was this translation helpful? Where is it that you cannot view them? 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. Open /etc/nsm/rules/local.rules using your favorite text editor. 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. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. Apply the firewall state to the node, or wait for the highstate to run for the changes to happen automatically. The format of the pillar file can be seen below, as well as in /opt/so/saltstack/default/pillar/thresholding/pillar.usage and /opt/so/saltstack/default/pillar/thresholding/pillar.example. A. 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. alert icmp any any -> any any (msg: "ICMP Testing"; sid:1000001; rev:1;). Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. 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). Files here should not be modified as changes would be lost during a code update. 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. Copyright 2023 In the image below, we can see how we define some rules for an eval node. Revision 39f7be52. 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. Have you tried something like this, in case you are not getting traffic to $HOME_NET? Salt can be used for data-driven orchestration, remote execution for any infrastructure, configuration management for any app stack, and much more. Please provide the output of sostat-redacted, attaching as a plain text file, or by using a service like Pastebin.com. You can see that we have an alert with the IP addresses we specified and the TCP ports we specified. Within 15 minutes, Salt should then copy those rules into /opt/so/rules/nids/local.rules. Custom rules can be added to the local.rules file Rule threshold entries can . 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. To unsubscribe from this group and stop receiving emails from it, send an email to security-onio.@googlegroups.com. 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. 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 the configuration window, select the relevant form of Syslog - here, it's Syslog JSON - and click. Pillars are a Saltstack concept, formatted typically in YAML, that can be used to parameterize states via templating. Our documentation has moved to https://securityonion.net/docs/. epic charting system training This writeup contains a listing of important Security Onion files and directories. Once logs are generated by network sniffing processes or endpoints, where do they go? 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). This wiki is no longer maintained. Give feedback. You can add Wazuh HIDS rules in /opt/so/rules/hids/local_rules.xml. 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 Our products include both the Security Onion software and specialized hardware appliances that are built and tested to run Security Onion. 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). Any pointers would be appreciated. However, generating custom traffic to test the alert can sometimes be a challenge. 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. Check out our NIDS tuning video at https://youtu.be/1jEkFIEUCuI! You can learn more about scapy at secdev.org and itgeekchronicles.co.uk. There isnt much in here other than anywhere, dockernet, localhost and self. 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 .

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