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. 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. > > > > > > > > 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. 7.2. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. IPS Policy ELSA? For some alerts, your understanding of your own network and the business being transacted across it will be the deciding factor. Introduction Adding local rules in Security Onion is a rather straightforward process. Within 15 minutes, Salt should then copy those rules into /opt/so/rules/nids/local.rules. epic charting system training 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. Check out our NIDS tuning video at https://youtu.be/1jEkFIEUCuI! Boot the ISO and run through the installer. Please keep this value below 90 seconds otherwise systemd will reach timeout and terminate the service. Default pillar file: This is the pillar file located under /opt/so/saltstack/default/pillar/. 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. To enable the Talos Subscriber ruleset in an already installed grid, modify the /opt/so/saltstack/local/pillar/minions/ file as follows: To add other remotely-accessible rulesets, add an entry under urls for the ruleset URL in /opt/so/saltstack/local/pillar/minions/: Copyright 2023 in Sguil? Another consideration is whether or not the traffic is being generated by a misconfigured piece of equipment. Check your syslog-ng configuration for the name of the local log source ("src" is used on SUSE systems). 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 syslog-ng, the following configuration forwards all local logs to Security Onion. 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. Do you see these alerts in Squert or ELSA? 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. 3. Adding local rules in Security Onion is a rather straightforward process. Backing up current downloaded.rules file before it gets overwritten. From the Command Line. 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. 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. Security Onion has Snort built in and therefore runs in the same instance. If you would like to create a rule yourself and use it with Suricata, this guide might be helpful. Security Onion is a free and open platform for threat hunting, enterprise security monitoring, and log management. For example, if you want to modify SID 2009582 and change $EXTERNAL_NET to $HOME_NET: The first string is a regex pattern, while the second is just a raw value. We created and maintain Security Onion, so we know it better than anybody else. When I run sostat. When you purchase products and services from us, you're helping to fund development of Security Onion! 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. You signed in with another tab or window. This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. /opt/so/saltstack/default/salt/firewall/hostgroups.yaml is where the default hostgroups are defined. For example, if you dont care that users are accessing Facebook, then you can silence the policy-based signatures for Facebook access. 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). There are two directories that contain the yaml files for the firewall configuration. It incorporates NetworkMiner, CyberChef, Squert, Sguil, Wazuh, Bro, Suricata, Snort, Kibana, Logstash, Elasticsearch, and numerous other security onion tools. 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. Salt can be used for data-driven orchestration, remote execution for any infrastructure, configuration management for any app stack, and much more. The territories controlled by the ROC consist of 168 islands, with a combined area of 36,193 square . 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. Finally, from the manager, update the config on the remote node: You can manage threshold entries for Suricata using Salt pillars. (Alternatively, you can press Ctrl+Alt+T to open a new shell.) 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. 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. the rule is missing a little syntax, maybe try: alert icmp any any -> $HOME_NET any (msg:"ICMP Testing"; sid:1000001; rev:1;). 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 Copyright 2023 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 ->. Logs. jq; so-allow; so-elastic-auth; so . For example, suppose we want to disable SID 2100498. Diagnostic logs can be found in /opt/so/log/salt/. 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. . You can see that we have an alert with the IP addresses we specified and the TCP ports we specified. /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. To unsubscribe from this group and stop receiving emails from it, send an email to. 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. 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. lawson cedars. 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. Give feedback. 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. This wiki is no longer maintained. 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. Tried as per your syntax, but still issue persists. /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. This repository has been archived by the owner on Apr 16, 2021. Security Onion Layers Ubuntu based OS Snort, Suricata Snorby Bro Sguil Squert . Our products include both the Security Onion software and specialized hardware appliances that are built and tested to run Security Onion. There isnt much in here other than anywhere, dockernet, localhost and self. 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! The remainder of this section will cover the host firewall built into Security Onion. Run rule-update (this will merge local.rules into downloaded.rules, update. Edit the /opt/so/rules/nids/local.rules file using vi or your favorite text editor: Paste the rule. 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. Use one of the following examples in your console/terminal window: sudo nano local.rules sudo vim local.rules. Revision 39f7be52. Security Onion. Try checking /var/log/nsm/hostname-interface/snortu-1.log for clues and please post the exact rule syntax you are attempting to use. However, generating custom traffic to test the alert can sometimes be a challenge. 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. If you right click on the, You can learn more about snort and writing snort signatures from the. Hi @Trash-P4nda , I've just updated the documentation to be clearer. /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 is a intrusion detection and network monitoring tool. If you need to increase this delay, it can be done using the salt:minion:service_start_delay pillar. If you pivot from that alert to the corresponding pcap you can verify the payload we sent. 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. Please update your bookmarks. 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 . 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 Port groups are a way of grouping together ports similar to a firewall port/service alias. to security-onion When I run 'rule-update' it give an error that there are no rules in /usr/local/lib/snort_dynamicrules. You received this message because you are subscribed to the Google Groups "security-onion" group. In Security Onion, locally created rules are stored in /opt/so/rules/nids/local.rules. In order to apply the threshold to all nodes, place the pillar in /opt/so/saltstack/local/pillar/global.sls. > To unsubscribe from this topic . Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. Security Onion generates a lot of valuable information for you the second you plug it into a TAP or SPAN port. Apply the firewall state to the node, or wait for the highstate to run for the changes to happen automatically. 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. https://docs.securityonion.net/en/2.3/local-rules.html?#id1. Add the following to the sensor minion pillar file located at. 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: Craft the layer 2 information. so-rule allows you to disable, enable, or modify NIDS rules. The server is also responsible for ruleset management. 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 This first sub-section will discuss network firewalls outside of Security Onion. 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. Generate some traffic to trigger the alert. =========================================================================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=========================================================================. 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. Run so-rule without any options to see the help output: We can use so-rule to modify an existing NIDS rule. Adding local rules in Security Onion is a rather straightforward process. Cannot retrieve contributors at this time. 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) 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. It . There are three alerting engines within Security Onion: Suricata, Wazuh and Playbook (Sigma). 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. Inside of /opt/so/saltstack/local/salt/strelka/rules/localrules, add your YARA rules. Between Zeek logs, alert data from Suricata, and full packet capture from Stenographer, you have enough information to begin identifying areas of interest and making positive changes to your security stance. Copyright 2023 Start creating a file for your rule. More information on each of these topics can be found in this section. This writeup contains a listing of important Security Onion files and directories. Assuming you have Internet access, Security Onion will automatically update your NIDS rules on a daily basis. You may want to bump the SID into the 90,000,000 range and set the revision to 1. 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. 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. 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. Add the following to the minions sls file located at. 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. If this is a distributed deployment, edit local.rules on your master server and it will replicate to your sensors. We offer both training and support for Security Onion. 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. 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. Long-term you should only run the rules necessary for > your environment. Host groups are similar to port groups but for storing lists of hosts that will be allowed to connect to the associated port groups. It is located at /opt/so/saltstack/local/pillar/global.sls. You need to configure Security Onion to send syslog so that InsightIDR can ingest it. You signed in with another tab or window. 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. Finally, run so-strelka-restart to allow Strelka to pull in the new rules. 4. Please review the Salt section to understand pillars and templates. Please provide the output of sostat-redacted, attaching as a plain text file, or by using a service like Pastebin.com. . This way, you still have the basic ruleset, but the situations in which they fire are altered. 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. 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. If it is, then the most expedient measure may be to resolve the misconfiguration and then reinvestigate tuning. I went ahead and put in the below rules under /etc/nsm/local.rules and ran the rule-update command. Revision 39f7be52. 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. Within 15 minutes, Salt should then copy those rules into /opt/so/rules/nids/local.rules. Double-click the Setup script on the Desktop and follow the prompts to configure and start the Sguil processes. This is located at /opt/so/saltstack/local/pillar/minions/.sls. When you run so-allow or so-firewall, it modifies this file to include the IP provided in the proper hostgroup. Answered by weslambert on Dec 15, 2021. 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. Salt sls files are in YAML format. For more information about Salt, please see https://docs.saltstack.com/en/latest/. 1. Tracking. 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. After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. Also ensure you run rule-update on the machine. 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. Copyright 2023 Are you sure you want to create this branch? If you would like to pull in NIDS rules from a MISP instance, please see the MISP Rules section. Salt sls files are in YAML format. You can find the latest version of this page at: https://securityonion.net/docs/AddingLocalRules. 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 want to apply the threshold to a single node, place the pillar in /opt/so/saltstack/local/pillar/minions/.sls. A tag already exists with the provided branch name. When editing these files, please be very careful to respect YAML syntax, especially whitespace. How are they stored? Next, run so-yara-update to pull down the rules. There are many ways to achieve age regression, but the three primary methods are: Botox. When configuring network firewalls for distributed deployments, youll want to ensure that nodes can connect as shown below. 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. . 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. If you are on a large network, you may need to do additional tuning like pinning processes to CPU cores. Minion pillar file: This is the minion specific pillar file that contains pillar definitions for that node. Modifying these values outside of so-allow or so-firewall could lead to problems accessing your existing hosts. 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. Can anyone tell me > > > > what I've done wrong please? Revision 39f7be52. . Once logs are generated by network sniffing processes or endpoints, where do they go? 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. However, generating custom traffic to test the alert can sometimes be a challenge. Security Onion a free and open platform for intrusion detection, enterprise security monitoring, and log management. Cleaning up local_rules.xml backup files older than 30 days. 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).