Security Onion Solutions ManagingAlerts Security-Onion-Solutions/security-onion Wiki - GitHub Security Onion uses idstools to download new signatures every night and process them against a set list of user generated configurations. Edit the /opt/so/rules/nids/local.rules file using vi or your favorite text editor: sudo vi /opt/so/rules/nids/local.rules Paste the rule. 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. Copyright 2023 Security Onion | Web3us LLC It is located at /opt/so/saltstack/local/pillar/global.sls. To add local YARA rules, create a directory in /opt/so/saltstack/local/salt/strelka/rules, for example localrules. 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: [email protected], https://groups.google.com/group/security-onion. 2. 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. Add the following to the sensor minion pillar file located at. Please note! Our instructors are the only Security Onion Certified Instructors in the world and our course material is the only authorized training material for Security Onion. Finally, run so-strelka-restart to allow Strelka to pull in the new rules. Adding local rules in Security Onion is a rather straightforward process. This wiki is no longer maintained. This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. You can add NIDS rules in /opt/so/saltstack/local/salt/idstools/local.rules on your manager. However, the exception is now logged. Security Onion: June 2013 If . Backing up current downloaded.rules file before it gets overwritten. Integrating Snort 3.0 (SnortSP) and Sguil in 3 Steps - Security Onion Local YARA rules Discussion #6556 Security-Onion - GitHub From the Command Line. When editing these files, please be very careful to respect YAML syntax, especially whitespace. AddingLocalRules Security-Onion-Solutions/security-onion Wiki 'Re: [security-onion] Rule still triggering even after modifying to Copyright 2023 Hi @Trash-P4nda , I've just updated the documentation to be clearer. Security Onion: An Interesting Guide For 2021 - Jigsaw Academy Local pillar file: This is the pillar file under /opt/so/saltstack/local/pillar/. 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. Escalate local privileges to root level. 3. epic charting system training All alerts are viewable in Alerts, Dashboards, Hunt, and Kibana. 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 out our NIDS tuning video at https://youtu.be/1jEkFIEUCuI! 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. Have you tried something like this, in case you are not getting traffic to $HOME_NET? Our documentation has moved to https://securityonion.net/docs/. Let's add a simple rule that will alert on the detection of a string in a tcp session. Please review the Salt section to understand pillars and templates. 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. Interested in discussing how our products and services can help your organization? Apply the firewall state to the node, or wait for the highstate to run for the changes to happen automatically. Security Deposit Reliable Up to $5,000 Payments Higher rents as supported by comparable rents Higher Voucher Payment Standards (VPS) 10/1/2021 Signing Bonus 1 - Bedroom = $893 to $1,064 2 - Bedroom = $1,017 to $1,216 3 - Bedroom = $1,283 to $1,530 4 - Bedroom = $1,568 to $1,872 5 - Bedroom = $1,804 to $2,153 6 - Bedroom = $2,038 to . Revision 39f7be52. The second only needs the $ character escaped to prevent bash from treating that as a variable. (Alternatively, you can press Ctrl+Alt+T to open a new shell.) Taiwan - Wikipedia In this file, the idstools section has a modify sub-section where you can add your modifications. Beta There are three alerting engines within Security Onion: Suricata, Wazuh and Playbook (Sigma). This directory contains the default firewall rules. 5. When you purchase products and services from us, you're helping to fund development of Security Onion! 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. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. However, generating custom traffic to test the alert can sometimes be a challenge. Salt is a core component of Security Onion 2 as it manages all processes on all nodes. Its important to note that with this functionality, care should be given to the suppressions being written to make sure they do not suppress legitimate alerts. Security Onion Set Up Part 3: Configuration of Version 14.04 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. This directory stores the firewall rules specific to your grid. 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. to security-onion yes it is set to 5, I have also played with the alert levels in the rules to see if the number was changing anything. This way, you still have the basic ruleset, but the situations in which they fire are altered. If you would like to pull in NIDS rules from a MISP instance, please see: 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). Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. 7.2. Adding Your Own Rules Suricata 6.0.0 documentation - Read the Docs 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. However, generating custom traffic to test the alert can sometimes be a challenge. Once logs are generated by network sniffing processes or endpoints, where do they go? 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. local.rules not working /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. After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. 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. Security Onion includes best-of-breed free and open tools including Suricata, Zeek, Wazuh, the Elastic Stack and many others. 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. 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. These are the files that will need to be changed in order to customize nodes. For more information about Salt, please see https://docs.saltstack.com/en/latest/. The set of processes includes sguild, mysql, and optionally the Elastic stack (Elasticsearch, Logstash, Kibana) and Curator. Another consideration is whether or not the traffic is being generated by a misconfigured piece of equipment. Security Onion is an open-source and free Linux distribution for log management, enterprise security monitoring, and intrusion detection. Default pillar file: This is the pillar file located under /opt/so/saltstack/default/pillar/. Open /etc/nsm/rules/local.rules using your favorite text editor. And when I check, there are no rules there. 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. These non-manager nodes are referred to as salt minions. By default, only the analyst hostgroup is allowed access to the nginx ports.