security onion local rules

. A tag already exists with the provided branch name. Syslog-ng and Security Onion You can find the latest version of this page at: https://securityonion.net/docs/AddingLocalRules. securityonion-docs/local-rules.rst at master Security-Onion-Solutions And when I check, there are no rules there. 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). Security Onion: June 2013 However, the exception is now logged. The set of processes includes sguild, mysql, and optionally the Elastic stack (Elasticsearch, Logstash, Kibana) and Curator. For more information, please see https://docs.saltproject.io/en/latest/topics/troubleshooting/yaml_idiosyncrasies.html. Next, run so-yara-update to pull down the rules. . 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. Identification. You need to configure Security Onion to send syslog so that InsightIDR can ingest it. Security Onion is a free and open source platform for threat hunting, network security monitoring, and log management. This writeup contains a listing of important Security Onion files and directories. 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. 3. 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. 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. Any pointers would be appreciated. Security Onion offers the following choices for rulesets to be used by Suricata. Introduction Adding local rules in Security Onion is a rather straightforward process. To configure syslog for Security Onion: Stop the Security Onion service. 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. . Before You Begin. 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 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. 2. . 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 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). 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. Within 15 minutes, Salt should then copy those rules into /opt/so/rules/nids/local.rules. Edit the /opt/so/rules/nids/local.rules file using vi or your favorite text editor: Paste the rule. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. Finally, from the manager, update the config on the remote node: You can manage threshold entries for Suricata using Salt pillars. Tuning NIDS Rules in Security Onion - YouTube Modifying these values outside of so-allow or so-firewall could lead to problems accessing your existing hosts. 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, The error can be ignored as it is not an indication of any issue with the minions. 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. 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. Backing up current downloaded.rules file before it gets overwritten. Revision 39f7be52. The county seat is in Evansville. While Vanderburgh County was the This wiki is no longer maintained. 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. From https://docs.saltstack.com/en/latest/: Salt is a core component of Security Onion 2 as it manages all processes on all nodes. Double-click the Setup script on the Desktop and follow the prompts to configure and start the Sguil processes. When you run so-allow or so-firewall, it modifies this file to include the IP provided in the proper hostgroup. After viewing your redacted sostat it seems that the ICMP and UDP rules are triggering: Are you using SO with in a VM? Adding local rules in Security Onion is a rather straightforward process. https://docs.securityonion.net/en/2.3/local-rules.html?#id1. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. OSSEC custom rules not generating alerts - Google Groups https://securityonion.net/docs/AddingLocalRules. You can learn more about snort and writing snort signatures from the Snort Manual. MISP Rules. You can add Wazuh HIDS rules in /opt/so/rules/hids/local_rules.xml. Once logs are generated by network sniffing processes or endpoints, where do they go? Logs . Copyright 2023 Add the following to the sensor minion pillar file located at. These non-manager nodes are referred to as salt minions. 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. Start by creating Berkeley Packet Filters (BPFs) to ignore any traffic that you dont want your network sensors to process. c96 extractor. 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. 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. 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. Age Regression SuppliesWelcome Welcome to Gabby's Little Store! This is to security-onion When I run 'rule-update' it give an error that there are no rules in /usr/local/lib/snort_dynamicrules. 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. 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. 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. Escalate local privileges to root level. 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. 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: 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. Salt sls files are in YAML format. For more information about Salt, please see https://docs.saltstack.com/en/latest/. You can add NIDS rules in /opt/so/saltstack/local/salt/idstools/local.rules on your manager. Tuning Security Onion 2.3 documentation Security Onion Layers Ubuntu based OS Snort, Suricata Snorby Bro Sguil Squert To verify the Snort version, type in snort -Vand hit Enter. You can see that we have an alert with the IP addresses we specified and the TCP ports we specified. In Security Onion, locally created rules are stored in /opt/so/rules/nids/local.rules. 2 Persons $40,550. 6 Persons $58,800. 3 Persons $45,600. 7 Persons If you want to tune Wazuh HIDS alerts, please see the Wazuh section. Finally, run so-strelka-restart to allow Strelka to pull in the new rules. How are they parsed? 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. Tracking. Add the following to the minions sls file located at. 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. For example, to check disk space on all nodes: If you want to force a node to do a full update of all salt states, you can run so-checkin. Default pillar file: This is the pillar file located under /opt/so/saltstack/default/pillar/. Please keep this value below 90 seconds otherwise systemd will reach timeout and terminate the service. Security Onion is an open-source and free Linux distribution for log management, enterprise security monitoring, and intrusion detection. 41 - Network Segmentation, VLANs, and Subnets. 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. 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. These are the files that will need to be changed in order to customize nodes. In 2008, Doug Burks started working on Security Onion, a Linux distribution for intrusion detection, network security monitoring, and log management. 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. The next run of idstools should then merge /opt/so/rules/nids/local.rules into /opt/so/rules/nids/all.rules which is what Suricata reads from. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. GitHub - security-onion-solutions/security-onion/wiki Copyright 2023 Security Onion is a intrusion detection and network monitoring tool. You may want to bump the SID into the 90,000,000 range and set the revision to 1. Diagnostic logs can be found in /opt/so/log/salt/. ELSA? Check out our NIDS tuning video at https://youtu.be/1jEkFIEUCuI! 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. If you would like to pull in NIDS rules from a MISP instance, please see: If this is a distributed deployment, edit local.rules on your master server and it will replicate to your sensors. 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. Can anyone tell me > > > > what I've done wrong please? If it is, then the most expedient measure may be to resolve the misconfiguration and then reinvestigate tuning. Security Onion is a platform that allows you to monitor your network for security alerts. There are three alerting engines within Security Onion: Suricata, Wazuh and Playbook (Sigma). PFA local.rules. Manager of Support and Professional Services. Host groups are similar to port groups but for storing lists of hosts that will be allowed to connect to the associated port groups. . Convert PSI to MPA | Chapel Steel Convert psi to - francescolangella.it It is now read-only. You received this message because you are subscribed to the Google Groups "security-onion" group. 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 are on a large network, you may need to do additional tuning like pinning processes to CPU cores. This directory contains the default firewall rules. 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. /opt/so/saltstack/local/salt/firewall/portgroups.local.yaml defines custom port groups. Global pillar file: This is the pillar file that can be used to make global pillar assignments to the nodes. You may want to bump the SID into the 90,000,000 range and set the revision to 1. Salt is a core component of Security Onion 2 as it manages all processes on all nodes. This first sub-section will discuss network firewalls outside of Security Onion. Security. AddingLocalRules Security-Onion-Solutions/security-onion Wiki Inside of /opt/so/saltstack/local/salt/strelka/rules/localrules, add your YARA rules. Pillars are a Saltstack concept, formatted typically in YAML, that can be used to parameterize states via templating. 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). Cannot retrieve contributors at this time. Long-term you should only run the rules necessary for > your environment. Ingest. Generate some traffic to trigger the alert. Security onion troubleshooting - silvestermallorca.de 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. Where is it that you cannot view them? When you purchase products and services from us, you're helping to fund development of Security Onion! If you right click on the, You can learn more about snort and writing snort signatures from the. 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. > > > > > > > > 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. A Campus Card is your University of Reading student/staff/associate The default allow rules for each node are defined by its role (manager, searchnode, sensor, heavynode, etc) in the grid. In this file, the idstools section has a modify sub-section where you can add your modifications. 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. 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. You signed in with another tab or window. 'Re: [security-onion] Rule still triggering even after modifying to All node types are added to the minion host group to allow Salt communication. This directory stores the firewall rules specific to your grid. By default, only the analyst hostgroup is allowed access to the nginx ports. IPS Policy 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). /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.

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