Started by Doug Burks, and first released in 2009, Security Onion has. Security Onion includes best-of-breed free and open tools including Suricata, Zeek, Wazuh, the Elastic Stack and many others. This is an advanced case and you most likely wont never need to modify these files. . Adding local rules in Security Onion is a rather straightforward process. Please review the Salt section to understand pillars and templates. Pillars are a Saltstack concept, formatted typically in YAML, that can be used to parameterize states via templating. 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. 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. 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 . 1. https://docs.securityonion.net/en/2.3/local-rules.html?#id1. Copyright 2023 7.2. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Salt sls files are in YAML format. Add the following to the minions sls file located at. As you can see I have the Security Onion machine connected within the internal network to a hub. 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 Before You Begin. This repository has been archived by the owner on Apr 16, 2021. Firewall Requirements Salt minions must be able to connect to the manager node on ports 4505/tcp and 4506/tcp: Security Onion Layers Ubuntu based OS Snort, Suricata Snorby Bro Sguil Squert Youll need to ensure the first of the two properly escapes any characters that would be interpreted by regex. The default allow rules for each node are defined by its role (manager, searchnode, sensor, heavynode, etc) in the grid. In Security Onion, locally created rules are stored in /opt/so/rules/nids/local.rules. After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. In the image below, we can see how we define some rules for an eval node. Also ensure you run rule-update on the machine. 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. 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. 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. There are three alerting engines within Security Onion: Suricata, Wazuh and Playbook (Sigma). Assuming you have Internet access, Security Onion will automatically update your NIDS rules on a daily basis. These non-manager nodes are referred to as salt minions. 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). Ingest. 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. Salt sls files are in YAML format. You signed in with another tab or window. Write your rule, see Rules Format and save it. 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. For a Security Onion client, you should dedicate at least 2GB RAM, but ideally 4GB if possible. For some alerts, your understanding of your own network and the business being transacted across it will be the deciding factor. 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. . alert icmp any any -> any any (msg: "ICMP Testing"; sid:1000001; rev:1;). These are the files that will need to be changed in order to customize nodes. . The county seat is in Evansville. 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. In a distributed deployment, the manager node controls all other nodes via salt. On Thursday, June 15, 2017 at 5:06:51 PM UTC+5:30, Wes wrote: Is it simply not triggering, or causing an error? However, generating custom traffic to test the alert can sometimes be a challenge. 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. This directory contains the default firewall rules. Any line beginning with "#" can be ignored as it is a comment. Please note that Suricata 6 has a 64-character limitation on the IP field in a threshold. Security Onion generates a lot of valuable information for you the second you plug it into a TAP or SPAN port. Any definitions made here will override anything defined in other pillar files, including global. the rule is missing a little syntax, maybe try: alert icmp any any -> $HOME_NET any (msg:"ICMP Testing"; sid:1000001; rev:1;). After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. How are they stored? You could try testing a rule . 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. When editing these files, please be very careful to respect YAML syntax, especially whitespace. Data collection Examination Diagnostic logs can be found in /opt/so/log/salt/. If so, then tune the number of AF-PACKET workers for sniffing processes. Let's add a simple rule that will alert on the detection of a string in a tcp session. /opt/so/saltstack/default/salt/firewall/portgroups.yaml is where the default port groups are defined. . You need to configure Security Onion to send syslog so that InsightIDR can ingest it. Answered by weslambert on Dec 15, 2021. Some node types get their IP assigned to multiple host groups. Revision 39f7be52. Our appliances will save you and your team time and resources, allowing you to focus on keeping your organization secure. to security-onion > > My rules is as follows: > > alert icmp any any -> (msg:"ICMP Testing"; sid:1000001; rev:1:) the rule is missing a little syntax, maybe try: alert icmp any any ->. 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. From https://docs.saltstack.com/en/latest/: Salt is a core component of Security Onion 2 as it manages all processes on all nodes. 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. In order to apply the threshold to all nodes, place the pillar in /opt/so/saltstack/local/pillar/global.sls. > > > > > > > > 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. Tracking. 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. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. 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. To verify the Snort version, type in snort -Vand hit Enter. Revision 39f7be52. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. 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. Copyright 2023 This way, you still have the basic ruleset, but the situations in which they fire are altered. If you built the rule correctly, then snort should be back up and running. Check your syslog-ng configuration for the name of the local log source ("src" is used on SUSE systems). Was this translation helpful? For example, suppose we want to disable SID 2100498. For example, if you include a bad custom snort rule with incorrect syntax, the snort engine will fail . If you right click on the, You can learn more about snort and writing snort signatures from the. According to NIST, which step in the digital forensics process involves drawing conclusions from data? 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. Revision 39f7be52. idstools may seem like it is ignoring your disabled rules request if you try to disable a rule that has flowbits set. /opt/so/saltstack/default/salt/firewall/hostgroups.yaml is where the default hostgroups are defined. You can learn more about snort and writing snort signatures from the Snort Manual. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. The set of processes includes sguild, mysql, and optionally the Elastic stack (Elasticsearch, Logstash, Kibana) and Curator. 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. Managing Rules; Adding Local Rules; Managing Alerts; High Performance Tuning; Tricks and Tips. 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. Naming convention: The collection of server processes has a server name separate from the hostname of the box. Give feedback. Start creating a file for your rule. https://securityonion.net/docs/AddingLocalRules. 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. 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: security-onion+unsubscribe@googlegroups.com, https://groups.google.com/group/security-onion. The error can be ignored as it is not an indication of any issue with the minions. I've just updated the documentation to be clearer. If you would like to create a rule yourself and use it with Suricata, this guide might be helpful. 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. For more information about Salt, please see https://docs.saltstack.com/en/latest/. Files here should not be modified as changes would be lost during a code update. Please update your bookmarks. 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. 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). Revision 39f7be52. 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. 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. Security Onion is a free and open source platform for threat hunting, network security monitoring, and log management. 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, To add local YARA rules, create a directory in /opt/so/saltstack/local/salt/strelka/rules, for example localrules. idstools helpfully resolves all of your flowbit dependencies, and in this case, is re-enabling that rule for you on the fly. You can see that we have an alert with the IP addresses we specified and the TCP ports we specified. A. This will add the host group to, Add the desired IPs to the host group. 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. 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. If you need to increase this delay, it can be done using the salt:minion:service_start_delay pillar. If you dont want to wait for these automatic processes, you can run them manually from the manager (replacing $SENSORNAME_$ROLE as necessary): Lets add a simple rule to /opt/so/saltstack/local/salt/idstools/local.rules thats really just a copy of the traditional id check returned root rule: Restart Suricata (replacing $SENSORNAME_$ROLE as necessary): If you built the rule correctly, then Suricata should be back up and running. All node types are added to the minion host group to allow Salt communication. 1. For more information, please see https://docs.saltproject.io/en/latest/topics/troubleshooting/yaml_idiosyncrasies.html. For example, suppose that we want to modify SID 2100498 and replace any instances of returned root with returned root test. Revision 39f7be52. All alerts are viewable in Alerts, Dashboards, Hunt, and Kibana. Logs . 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. 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. 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. When I run sostat. Security Onion is a platform that allows you to monitor your network for security alerts. 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 . . 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. You received this message because you are subscribed to the Google Groups "security-onion" group. You can add NIDS rules in /opt/so/saltstack/local/salt/idstools/local.rules on your manager. Backing up current downloaded.rules file before it gets overwritten. In the configuration window, select the relevant form of Syslog - here, it's Syslog JSON - and click. We can start by listing any rules that are currently modified: Lets first check the syntax for the add option: Now that we understand the syntax, lets add our modification: Once the command completes, we can verify that our modification has been added: Finally, we can check the modified rule in /opt/so/rules/nids/all.rules: To include an escaped $ character in the regex pattern youll need to make sure its properly escaped. . Durio zibethinus, native to Borneo and Sumatra, is the only species available in the international market.It has over 300 named varieties in Thailand and 100 in Malaysia, as of 1987. 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. Logs. Finally, from the manager, update the config on the remote node: You can manage threshold entries for Suricata using Salt pillars. There are many ways to achieve age regression, but the three primary methods are: Botox. Adding Your Own Rules . 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. 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 and dont forget that the end is a semicolon and not a colon. 41 - Network Segmentation, VLANs, and Subnets. Our documentation has moved to https://securityonion.net/docs/. 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. If SID 4321 is noisy, you can disable it as follows: From the manager, run the following to update the config: If you want to disable multiple rules at one time, you can use a regular expression, but make sure you enclose the full entry in single quotes like this: We can use so-rule to modify an existing NIDS rule. One thing you can do with it (and the one that most people are interested in) is to configure it for IDS mode. Security Onion. How are they parsed? 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. We offer both training and support for Security Onion. In syslog-ng, the following configuration forwards all local logs to Security Onion. 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. Backing up current local_rules.xml file. 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. For example, if you dont care that users are accessing Facebook, then you can silence the policy-based signatures for Facebook access. Where is it that you cannot view them? Global pillar file: This is the pillar file that can be used to make global pillar assignments to the nodes. The server is also responsible for ruleset management. Custom rules can be added to the local.rules file Rule threshold entries can . 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. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. But after I run the rule-update command, no alert is generated in Sguil based on that rule.It was working when I first installed Security Onion. The reason I have a hub and not a switch is so that all traffic is forwarded to every device connected to it so security onion can see the traffic sent from the attacking kali linux machine, to the windows machines. Manager of Support and Professional Services. 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! 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. 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. After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. Security Onion is a intrusion detection and network monitoring tool. 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. By default, only the analyst hostgroup is allowed access to the nginx ports. However, the exception is now logged. Then tune your IDS rulesets. 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. Then tune your IDS rulesets. 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. Host groups and port groups can be created or modified from the manager node using either so-allow, so-firewall or manually editing the yaml files. /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. lawson cedars. To configure syslog for Security Onion: Stop the Security Onion service. Find Age Regression Discord servers and make new friends! 3. Previously, in the case of an exception, the code would just pass. 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 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. Please provide the output of sostat-redacted, attaching as a plain text file, or by using a service like Pastebin.com. Another consideration is whether or not the traffic is being generated by a misconfigured piece of equipment. While Vanderburgh County was the seventh-largest county in 2010 population with 179,703 people, it is also the eighth-smallest county in area in Indiana and the smallest in southwestern Indiana, covering only 236 square miles (610 km2). Port groups are a way of grouping together ports similar to a firewall port/service alias. All the following will need to be run from the 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,. When configuring network firewalls for distributed deployments, youll want to ensure that nodes can connect as shown below. There are multiple ways to handle overly productive signatures and well try to cover as many as we can without producing a full novel on the subject. 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. Finally, run so-strelka-restart to allow Strelka to pull in the new rules. These non-manager nodes are referred to as salt minions. Reboot into your new Security Onion installation and login using the username/password you specified in the previous step. 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. Default pillar file: This is the pillar file located under /opt/so/saltstack/default/pillar/. 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. Double-click the Setup script on the Desktop and follow the prompts to configure and start the Sguil processes. After select all interfaces also ICMP logs not showing in sguil. 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 this is a distributed deployment, edit local.rules on your master server and it will replicate to your sensors. sigs.securityonion.net (Signature files for Security Onion containers) ghcr.io (Container downloads) rules.emergingthreatspro.com (Emerging Threats IDS rules) rules.emergingthreats.net (Emerging Threats IDS open rules) www.snort.org (Paid Snort Talos ruleset) github.com (Strelka and Sigma rules updates) 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. Security Onion is an open-source and free Linux distribution for log management, enterprise security monitoring, and intrusion detection.