security onion local rules

Adding local rules in Security Onion is a rather straightforward process. Salt is a core component of Security Onion 2 as it manages all processes on all nodes. PFA local.rules. However, generating custom traffic to test the alert can sometimes be a challenge. /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. Global pillar file: This is the pillar file that can be used to make global pillar assignments to the nodes. 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. 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. You need to configure Security Onion to send syslog so that InsightIDR can ingest it. For more information, please see https://docs.saltproject.io/en/latest/topics/troubleshooting/yaml_idiosyncrasies.html. 1. Salt is a new approach to infrastructure management built on a dynamic communication bus. 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. Security Onion uses idstools to download new signatures every night and process them against a set list of user generated configurations. Adding local rules in Security Onion is a rather straightforward process. Start by creating Berkeley Packet Filters (BPFs) to ignore any traffic that you dont want your network sensors to process. For example, suppose that we want to modify SID 2100498 and replace any instances of returned root with returned root test. Can anyone tell me > > > > what I've done wrong please? /opt/so/saltstack/local/salt/firewall/portgroups.local.yaml defines custom port groups. 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! 2 Persons $40,550. 6 Persons $58,800. 3 Persons $45,600. 7 Persons 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. 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. 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. Are you sure you want to create this branch? Zero Dollar Detection and Response Orchestration with n8n, Security Security Onion | Web3us LLC Security Onion is a intrusion detection and network monitoring tool. Managing Rules Security Onion 2.3 documentation Managing Rules; Adding Local Rules; Managing Alerts; High Performance Tuning; Tricks and Tips. There are many ways to achieve age regression, but the three primary methods are: Botox. This repository has been archived by the owner on Apr 16, 2021. GitHub - security-onion-solutions/security-onion/wiki 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. 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. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. After select all interfaces also ICMP logs not showing in sguil. 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. Reboot into your new Security Onion installation and login using the username/password you specified in the previous step. Entry-Level Network Traffic Analysis with Security Onion - Totem Copyright 2023 Ingest. Custom local.rules not showing up in kibana NIDS page #1712 - GitHub The county seat is in Evansville. If you want to apply the threshold to a single node, place the pillar in /opt/so/saltstack/local/pillar/minions/.sls. 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. Next, run so-yara-update to pull down the rules. Security Onion a free and open platform for intrusion detection, enterprise security monitoring, and log management. Add the following to the sensor minion pillar file located at. 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,. 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. 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. No rules in /usr/local/lib/snort_dynamicrules - Google Groups /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. If you right click on the, You can learn more about snort and writing snort signatures from the. How to exclude IP After enabling all default Snort Rules - Google Groups Let's add a simple rule that will alert on the detection of a string in a tcp session. A. These non-manager nodes are referred to as salt minions. 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. The territories controlled by the ROC consist of 168 islands, with a combined area of 36,193 square . 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). 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. Security Onion generates a lot of valuable information for you the second you plug it into a TAP or SPAN port. Minion pillar file: This is the minion specific pillar file that contains pillar definitions for that node. How are they parsed? c96 extractor. 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. If you would like to pull in NIDS rules from a MISP instance, please see the MISP Rules section. Finally, run so-strelka-restart to allow Strelka to pull in the new rules. Escalate local privileges to root level. Security Onion: An Interesting Guide For 2021 - Jigsaw Academy idstools helpfully resolves all of your flowbit dependencies, and in this case, is re-enabling that rule for you on the fly. If so, then tune the number of AF-PACKET workers for sniffing processes. After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. . Previously, in the case of an exception, the code would just pass. 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. Security Onion is a free and open source platform for threat hunting, network security monitoring, and log management. Re: [security-onion] Snort Local rules not getting alerts in ELSA / SQUERT When editing these files, please be very careful to respect YAML syntax, especially whitespace. I went ahead and put in the below rules under /etc/nsm/local.rules and ran the rule-update command. 3. Security Onion has Snort built in and therefore runs in the same instance. 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 Default YARA rules are provided from Florian Roths signature-base Github repo at https://github.com/Neo23x0/signature-base. Boot the ISO and run through the installer. 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. Check your syslog-ng configuration for the name of the local log source ("src" is used on SUSE systems). 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. Local YARA rules Discussion #6556 Security-Onion - GitHub lawson cedars. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. 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. 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. Give feedback. 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. Do you see these alerts in Squert or ELSA? Backing up current downloaded.rules file before it gets overwritten. Syslog-ng and Security Onion To get the best performance out of Security Onion, youll want to tune it for your environment. . The set of processes includes sguild, mysql, and optionally the Elastic stack (Elasticsearch, Logstash, Kibana) and Curator. Logs. 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. Revision 39f7be52. Tuning Security Onion 2.3 documentation Security Onion offers the following choices for rulesets to be used by Suricata. 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. FAQ Security-Onion-Solutions/security-onion Wiki GitHub 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. Revision 39f7be52. Copyright 2023 Tracking. If you are on a large network, you may need to do additional tuning like pinning processes to CPU cores. More information on each of these topics can be found in this section. local.rules not working We've been teaching Security Onion classes and providing Professional Services since 2014. Security Onion Layers Ubuntu based OS Snort, Suricata Snorby Bro Sguil Squert Copyright 2023 Pillars are a Saltstack concept, formatted typically in YAML, that can be used to parameterize states via templating. This is located at /opt/so/saltstack/local/pillar/minions/.sls. In this file, the idstools section has a modify sub-section where you can add your modifications. 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. Local pillar file: This is the pillar file under /opt/so/saltstack/local/pillar/. Please keep this value below 90 seconds otherwise systemd will reach timeout and terminate the service. To unsubscribe from this group and stop receiving emails from it, send an email to. However, generating custom traffic to test the alert can sometimes be a challenge. When editing these files, please be very careful to respect YAML syntax, especially whitespace. After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. /opt/so/saltstack/default/salt/firewall/hostgroups.yaml is where the default hostgroups are defined. Enter the following sample in a line at a time. Long-term you should only run the rules necessary for > your environment. Please update your bookmarks. From https://docs.saltstack.com/en/latest/: Salt is a core component of Security Onion 2 as it manages all processes on all nodes. Security Onion is an open-source and free Linux distribution for log management, enterprise security monitoring, and intrusion detection. "; reference: url,http://holisticinfosec.blogspot.com/2011/12/choose-2011-toolsmith-tool-of-year.html; content: "toolsmith"; flow:to_server; nocase; sid:9000547; metadata:policy security-ips; rev:1). Please note! 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 In Security Onion, locally created rules are stored in /opt/so/rules/nids/local.rules. Hi @Trash-P4nda , I've just updated the documentation to be clearer. Default pillar file: This is the pillar file located under /opt/so/saltstack/default/pillar/. 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. Salt can be used for data-driven orchestration, remote execution for any infrastructure, configuration management for any app stack, and much more. 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. When I run sostat. Adding local rules in Security Onion is a rather straightforward process. 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. For a Security Onion client, you should dedicate at least 2GB RAM, but ideally 4GB if possible. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. Guilty Gear Strive Sol Matchups, Articles S