Inside of /opt/so/saltstack/local/salt/strelka/rules/localrules, add your YARA rules. 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. Revision 39f7be52. Add the following to the minions sls file located at. . When configuring network firewalls for distributed deployments, youll want to ensure that nodes can connect as shown below. Security Onion has Snort built in and therefore runs in the same instance. 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. 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. 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. 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). However, the exception is now logged. (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NIDS Rules in Security Onion Security Onion 7.5K subscribers 48 Dislike Share 1,465 views Dec 22, 2021 This video has been archived as of January 2022 - the latest. 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. 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. When I run sostat. Saltstack states are used to ensure the state of objects on a minion. In Security Onion, locally created rules are stored in /opt/so/rules/nids/local.rules. 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 Security Onion includes best-of-breed free and open tools including Suricata, Zeek, Wazuh, the Elastic Stack and many others. 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. Enter the following sample in a line at a time. Copyright 2023 . 3. 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). This wiki is no longer maintained. Default pillar file: This is the pillar file located under /opt/so/saltstack/default/pillar/. Security Onion uses idstools to download new signatures every night and process them against a set list of user generated configurations. For example, the following threshold IP exceeds the 64-character limit: This results in the following error in the Suricata log: The solution is to break the ip field into multiple entries like this: A suppression rule allows you to make some finer grained decisions about certain rules without the onus of rewriting them. This repository has been archived by the owner on Apr 16, 2021. Answered by weslambert on Dec 15, 2021. Finally, from the manager, update the config on the remote node: You can manage threshold entries for Suricata using Salt pillars. Run rule-update (this will merge local.rules into downloaded.rules, update. In 2008, Doug Burks started working on Security Onion, a Linux distribution for intrusion detection, network security monitoring, and log management. Please update your bookmarks. 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. Any line beginning with "#" can be ignored as it is a comment. Security Onion offers the following choices for rulesets to be used by Suricata. Our appliances will save you and your team time and resources, allowing you to focus on keeping your organization secure. If you would like to create a rule yourself and use it with Suricata, this guide might be helpful. MISP Rules. Beta Backing up current downloaded.rules file before it gets overwritten. 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. Set anywhere from 5 to 12 in the local_rules Kevin. Started by Doug Burks, and first released in 2009, Security Onion has. All alerts are viewable in Alerts, Dashboards, Hunt, and Kibana. These policy types can be found in /etc/nsm/rules/downloaded.rules. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. Cannot retrieve contributors at this time. Do you see these alerts in Squert or ELSA? You may want to bump the SID into the 90,000,000 range and set the revision to 1. Are you sure you want to create this branch? the rule is missing a little syntax, maybe try: alert icmp any any -> $HOME_NET any (msg:"ICMP Testing"; sid:1000001; rev:1;). Let's add a simple rule that will alert on the detection of a string in a tcp session. There isnt much in here other than anywhere, dockernet, localhost and self. 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. These non-manager nodes are referred to as salt minions. /opt/so/saltstack/local/salt/firewall/hostgroups.local.yaml is where many default named hostgroups get populated with IPs that are specific to your environment. Next, run so-yara-update to pull down the rules. 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). Naming convention: The collection of server processes has a server name separate from the hostname of the box. . To add local YARA rules, create a directory in /opt/so/saltstack/local/salt/strelka/rules, for example localrules. 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. Security Onion is a free and open platform for threat hunting, enterprise security monitoring, and log management. 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,. Revision 39f7be52. 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. Cleaning up local_rules.xml backup files older than 30 days. The server is also responsible for ruleset management. If you previously added a host or network to your firewall configuration and now need to remove them, you can use so-firewall with the excludehost option. Logs . Salt is a new approach to infrastructure management built on a dynamic communication bus. Assuming you have Internet access, Security Onion will automatically update your NIDS rules on a daily basis. After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. The territories controlled by the ROC consist of 168 islands, with a combined area of 36,193 square . 4. PFA local.rules. Reboot into your new Security Onion installation and login using the username/password you specified in the previous step. 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. Security Onion is a platform that allows you to monitor your network for security alerts. Within 15 minutes, Salt should then copy those rules into /opt/so/rules/nids/local.rules. You signed in with another tab or window. /opt/so/saltstack/local/salt/firewall/portgroups.local.yaml defines custom port groups. 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. 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. /opt/so/saltstack/default/salt/firewall/portgroups.yaml, /opt/so/saltstack/default/salt/firewall/hostgroups.yaml, /opt/so/saltstack/default/salt/firewall/assigned_hostgroups.map.yaml, /opt/so/saltstack/local/salt/firewall/portgroups.local.yaml, /opt/so/saltstack/local/salt/firewall/hostgroups.local.yaml, /opt/so/saltstack/local/salt/firewall/assigned_hostgroups.local.map.yaml, /opt/so/saltstack/local/pillar/minions/_.sls, Allow hosts to send syslog to a sensor node, raw.githubusercontent.com (Security Onion public key), sigs.securityonion.net (Signature files for Security Onion containers), rules.emergingthreatspro.com (Emerging Threats IDS rules), rules.emergingthreats.net (Emerging Threats IDS open rules), github.com (Strelka and Sigma rules updates), geoip.elastic.co (GeoIP updates for Elasticsearch), storage.googleapis.com (GeoIP updates for Elasticsearch), download.docker.com (Docker packages - Ubuntu only), repo.saltstack.com (Salt packages - Ubuntu only), packages.wazuh.com (Wazuh packages - Ubuntu only), 3142 (Apt-cacher-ng) (if manager proxy enabled, this is repocache.securityonion.net as mentioned above), Create a new host group that will contain the IPs of the hosts that you want to allow to connect to the sensor. You need to configure Security Onion to send syslog so that InsightIDR can ingest it. We offer both training and support for Security Onion. If you would like to pull in NIDS rules from a MISP instance, please see: Introduction Adding local rules in Security Onion is a rather straightforward process. Here are some of the items that can be customized with pillar settings: Currently, the salt-minion service startup is delayed by 30 seconds. Copyright 2023 Pillars are a Saltstack concept, formatted typically in YAML, that can be used to parameterize states via templating. Any pointers would be appreciated. Escalate local privileges to root level. In a distributed deployment, the manager node controls all other nodes via salt. It is located at /opt/so/saltstack/local/pillar/global.sls. In this file, the idstools section has a modify sub-section where you can add your modifications. You signed in with another tab or window. 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. The county seat is in Evansville. I went ahead and put in the below rules under /etc/nsm/local.rules and ran the rule-update command. and dont forget that the end is a semicolon and not a colon. One thing you can do with it (and the one that most people are interested in) is to configure it for IDS mode. 5. This first sub-section will discuss network firewalls outside of Security Onion. 3. . If it is, then the most expedient measure may be to resolve the misconfiguration and then reinvestigate tuning. jq; so-allow; so-elastic-auth; so . 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. Can anyone tell me > > > > what I've done wrong please? 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. Adding Your Own Rules . In the image below, we can see how we define some rules for an eval node. However, generating custom traffic to test the alert can sometimes be a challenge. Use one of the following examples in your console/terminal window: sudo nano local.rules sudo vim local.rules. Double-click the Setup script on the Desktop and follow the prompts to configure and start the Sguil processes. Any definitions made here will override anything defined in other pillar files, including global. Salt minions must be able to connect to the manager node on ports, /opt/so/saltstack/local/pillar/global.sls, /opt/so/saltstack/local/pillar/minions/.sls, https://docs.saltproject.io/en/getstarted/system/communication.html, https://docs.saltproject.io/en/latest/topics/troubleshooting/yaml_idiosyncrasies.html. alert icmp any any -> any 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. Security Onion is a free and open source platform for threat hunting, network security monitoring, and log management. The remainder of this section will cover the host firewall built into Security Onion. These are the files that will need to be changed in order to customize nodes. =========================================================================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=========================================================================. The second only needs the $ character escaped to prevent bash from treating that as a variable. You signed in with another tab or window. 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. When editing these files, please be very careful to respect YAML syntax, especially whitespace. To unsubscribe from this group and stop receiving emails from it, send an email to security-onio.@googlegroups.com. In the configuration window, select the relevant form of Syslog - here, it's Syslog JSON - and click. If you need to increase this delay, it can be done using the salt:minion:service_start_delay pillar. Managing Rules; Adding Local Rules; Managing Alerts; High Performance Tuning; Tricks and Tips. 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. The error can be ignored as it is not an indication of any issue with the minions. 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. /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. 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. Start creating a file for your rule. You can add Wazuh HIDS rules in /opt/so/rules/hids/local_rules.xml. (Alternatively, you can press Ctrl+Alt+T to open a new shell.) 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 . 2. Full Name. 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! After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. This section will cover both network firewalls outside of Security Onion and the host-based firewall built into Security Onion. After select all interfaces also ICMP logs not showing in sguil. Security Onion is a intrusion detection and network monitoring tool. Global pillar file: This is the pillar file that can be used to make global pillar assignments to the nodes. However, generating custom traffic to test the alert can sometimes be a challenge. Give feedback. 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: 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. Hi @Trash-P4nda , I've just updated the documentation to be clearer. It is now read-only. /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. . Backing up current local_rules.xml file. 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 To unsubscribe from this group and stop receiving emails from it, send an email to. If you want to apply the threshold to a single node, place the pillar in /opt/so/saltstack/local/pillar/minions/.sls. You received this message because you are subscribed to the Google Groups "security-onion" group. Please review the Salt section to understand pillars and templates. Host groups are similar to port groups but for storing lists of hosts that will be allowed to connect to the associated port groups. Please provide the output of sostat-redacted, attaching as a plain text file, or by using a service like Pastebin.com. 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 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. Revision 39f7be52. Security Onion. The signature id (SID) must be unique. Tried as per your syntax, but still issue persists. ELSA? See above for suppress examples. Adding local rules in Security Onion is a rather straightforward process. For example, consider the following rules that reference the ET.MSSQL flowbit. 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. Apply the firewall state to the node, or wait for the highstate to run for the changes to happen automatically. 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. 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. . You can see that we have an alert with the IP addresses we specified and the TCP ports we specified. Diagnostic logs can be found in /opt/so/log/salt/. /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. 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. This is located at /opt/so/saltstack/local/pillar/minions/.sls.