security onion local rules

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. Security Onion: A Linux Distro For IDS, NSM, And Log Management | Unixmen Revision 39f7be52. 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 Tuning Security Onion 2.3 documentation These non-manager nodes are referred to as salt minions. For more information, please see https://docs.saltproject.io/en/latest/topics/troubleshooting/yaml_idiosyncrasies.html. This wiki is no longer maintained. Salt sls files are in YAML format. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. 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. 7.2. Please note that Suricata 6 has a 64-character limitation on the IP field in a threshold. > To unsubscribe from this topic . However, generating custom traffic to test the alert can sometimes be a challenge. If you would like to pull in NIDS rules from a MISP instance, please see: local.rules not working (Archived 1/22) Tuning NIDS Rules in Security Onion - YouTube All alerts are viewable in Alerts, Dashboards, Hunt, and Kibana. You may want to bump the SID into the 90,000,000 range and set the revision to 1. This is located at /opt/so/saltstack/local/pillar/minions/.sls. 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. As you can see I have the Security Onion machine connected within the internal network to a hub. Any line beginning with "#" can be ignored as it is a comment. 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. Fresh install of Security Onion 16.04.6.3 ISO to hardware: Two NICs, one facing management network, one monitoring mirrored port for test network Setup for Production Mode, pretty much all defaults, suricata create alert rules for /etc/nsm/local.rules and run rule-update Log into scapy/msf on kalibox, send a few suspicious packets Our documentation has moved to https://securityonion.net/docs/. However, the exception is now logged. 3. Entry-Level Network Traffic Analysis with Security Onion - Totem Open /etc/nsm/rules/local.rules using your favorite text editor. We created and maintain Security Onion, so we know it better than anybody else. When configuring network firewalls for distributed deployments, youll want to ensure that nodes can connect as shown below. Now we have to build the association between the host group and the syslog port group and assign that to our sensor node. Where is it that you cannot view them? 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. Tracking. Security Onion uses idstools to download new signatures every night and process them against a set list of user generated configurations. From https://docs.saltstack.com/en/latest/: Salt is a core component of Security Onion 2 as it manages all processes on all nodes. You can add Wazuh HIDS rules in /opt/so/rules/hids/local_rules.xml. How are they parsed? Minion pillar file: This is the minion specific pillar file that contains pillar definitions for that node. The county seat is in Evansville. While Vanderburgh County was the 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. Now that we have a signature that will generate alerts a little more selectively, we need to disable the original signature. . 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. The remainder of this section will cover the host firewall built into Security Onion. 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. Finally, from the manager, update the config on the remote node: You can manage threshold entries for Suricata using Salt pillars. Please note! Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. See above for suppress examples. By default, only the analyst hostgroup is allowed access to the nginx ports. Start creating a file for your rule. Revision 39f7be52. From the Command Line. Identification. For example, consider the following rules that reference the ET.MSSQL flowbit. 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 Start by creating Berkeley Packet Filters (BPFs) to ignore any traffic that you don't want your network sensors to process. 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. Cleaning up local_rules.xml backup files older than 30 days. Revision 39f7be52. This first sub-section will discuss network firewalls outside of Security Onion. 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 . Do you see these alerts in Squert or ELSA? One thing you can do with it (and the one that most people are interested in) is to configure it for IDS mode. 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. As shown above, we edit the minion pillar and add the SID to the idstools - sids - disabled section. securityonion-docs/local-rules.rst at master Security-Onion-Solutions Any pointers would be appreciated. With this functionality we can suppress rules based on their signature, the source or destination address and even the IP or full CIDR network block. Write your rule, see Rules Format and save it. 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. All the following will need to be run from the manager. You signed in with another tab or window. ELSA? Security Onion Documentation Security Onion 2.3 documentation The set of processes includes sguild, mysql, and optionally the Elastic stack (Elasticsearch, Logstash, Kibana) and Curator. Modifying these values outside of so-allow or so-firewall could lead to problems accessing your existing hosts. 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 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. IPS Policy Durian - Wikipedia You can find the latest version of this page at: https://securityonion.net/docs/AddingLocalRules. 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. This is an advanced case and you most likely wont never need to modify these files. Run rule-update (this will merge local.rules into downloaded.rules, update. 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). Adding local rules in Security Onion is a rather straightforward process. Salt sls files are in YAML format. /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. c96 extractor. Introduction Adding local rules in Security Onion is a rather straightforward process. This error now occurs in the log due to a change in the exception handling within Salts event module. Logs. For a Security Onion client, you should dedicate at least 2GB RAM, but ideally 4GB if possible. and dont forget that the end is a semicolon and not a colon. Security Onion is an open-source and free Linux distribution for log management, enterprise security monitoring, and intrusion detection. Started by Doug Burks, and first released in 2009, Security Onion has. Within 15 minutes, Salt should then copy those rules into /opt/so/rules/nids/local.rules. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. Ingest. Edit the /opt/so/rules/nids/local.rules file using vi or your favorite text editor: Paste the rule. Default pillar file: This is the pillar file located under /opt/so/saltstack/default/pillar/. Security Onion has Snort built in and therefore runs in the same instance. When I run sostat. 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). 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. 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. 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. 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. epic charting system training Reboot into your new Security Onion installation and login using the username/password you specified in the previous step. Then tune your IDS rulesets. Files here should not be modified as changes would be lost during a code update. In the image below, we can see how we define some rules for an eval node. https://securityonion.net/docs/AddingLocalRules. Convert PSI to MPA | Chapel Steel Convert psi to - francescolangella.it 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. Next, run so-yara-update to pull down the rules. Zero Dollar Detection and Response Orchestration with n8n, Security Hi @Trash-P4nda , I've just updated the documentation to be clearer. You may want to bump the SID into the 90,000,000 range and set the revision to 1. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. in Sguil? For more information about Salt, please see https://docs.saltstack.com/en/latest/. After select all interfaces also ICMP logs not showing in sguil. 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. If you want to apply the threshold to a single node, place the pillar in /opt/so/saltstack/local/pillar/minions/.sls. If it is, then the most expedient measure may be to resolve the misconfiguration and then reinvestigate tuning. Salt is a core component of Security Onion 2 as it manages all processes on all nodes. This repository has been archived by the owner on Apr 16, 2021. > > > > > > > > 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. Managing Rules; Adding Local Rules; Managing Alerts; High Performance Tuning; Tricks and Tips. 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. If you pivot from that alert to the corresponding pcap you can verify the payload we sent. Copyright 2023 Local pillar file: This is the pillar file under /opt/so/saltstack/local/pillar/. 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. The National Institutes of Standards and Technology (NIST) 800-171 cybersecurity standard has four safeguards that are related to network traffic monitoring: 3.13.1: Monitor, control, and protect organizational communications (i.e., information transmitted or received by organizational information Another consideration is whether or not the traffic is being generated by a misconfigured piece of equipment. Security Onion includes best-of-breed free and open tools including Suricata, Zeek, Wazuh, the Elastic Stack and many others. 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. There isnt much in here other than anywhere, dockernet, localhost and self. Copyright 2023 In this file, the idstools section has a modify sub-section where you can add your modifications. The territories controlled by the ROC consist of 168 islands, with a combined area of 36,193 square . 1. Security onion troubleshooting - silvestermallorca.de 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. The county seat is in Evansville. Security Onion | Web3us LLC https://docs.securityonion.net/en/2.3/local-rules.html?#id1. Security Onion is a intrusion detection and network monitoring tool. 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. On Thursday, June 15, 2017 at 5:06:51 PM UTC+5:30, Wes wrote: Is it simply not triggering, or causing an error? Firewall Security Onion 2.3 documentation I've just updated the documentation to be clearer. After viewing your redacted sostat it seems that the ICMP and UDP rules are triggering: Are you using SO with in a VM? Add the following to the sensor minion pillar file located at. Re: [security-onion] Snort Local rules not getting alerts in ELSA / SQUERT 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! How to create and monitor your Snort's rules in Security Onion? Previously, in the case of an exception, the code would just pass. 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. For example, if you dont care that users are accessing Facebook, then you can silence the policy-based signatures for Facebook access. 1. Syslog-ng and Security Onion Backing up current downloaded.rules file before it gets overwritten. A. However, generating custom traffic to test the alert can sometimes be a challenge.

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