security onion local rulessecurity onion local rules

From the Command Line. After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. Run rule-update (this will merge local.rules into downloaded.rules, update. Some node types get their IP assigned to multiple host groups. 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. Edit the /opt/so/rules/nids/local.rules file using vi or your favorite text editor: Paste the rule. 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 . Revision 39f7be52. 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. 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. You may want to bump the SID into the 90,000,000 range and set the revision to 1. To get the best performance out of Security Onion, youll want to tune it for your environment. You received this message because you are subscribed to the Google Groups "security-onion" group. Copyright 2023 You can find the latest version of this page at: https://securityonion.net/docs/AddingLocalRules. Youll need to ensure the first of the two properly escapes any characters that would be interpreted by regex. Do you see these alerts in Squert or ELSA? Long-term you should only run the rules necessary for > your environment. Revision 39f7be52. Then tune your IDS rulesets. Assuming you have Internet access, Security Onion will automatically update your NIDS rules on a daily basis. 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. Check your syslog-ng configuration for the name of the local log source ("src" is used on SUSE systems). Pillars are a Saltstack concept, formatted typically in YAML, that can be used to parameterize states via templating. 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. Of course, the target IP address will most likely be different in your environment: destination d_tcp { tcp("192.168.3.136" port(514)); }; log { If you are on a large network, you may need to do additional tuning like pinning processes to CPU cores. lawson cedars. 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. It is now read-only. Salt sls files are in YAML format. This is located at /opt/so/saltstack/local/pillar/minions/.sls. Saltstack states are used to ensure the state of objects on a minion. To add local YARA rules, create a directory in /opt/so/saltstack/local/salt/strelka/rules, for example localrules. Hi @Trash-P4nda , I've just updated the documentation to be clearer. When configuring network firewalls for distributed deployments, youll want to ensure that nodes can connect as shown below. Introduction Adding local rules in Security Onion is a rather straightforward process. alert icmp any any -> any any (msg: "ICMP Testing"; sid:1000001; rev:1;). One thing you can do with it (and the one that most people are interested in) is to configure it for IDS mode. Please note that Suricata 6 has a 64-character limitation on the IP field in a threshold. 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). If you built the rule correctly, then snort should be back up and running. First off, I'll briefly explain security onion security Onion is the leading open source operating system for network security monitoring, intrusion detection, log management and threat hunting. Check out our NIDS tuning video at https://youtu.be/1jEkFIEUCuI! The county seat is in Evansville. Security Onion is a free and open source platform for threat hunting, network security monitoring, and log management. 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. Please review the Salt section to understand pillars and templates. Try checking /var/log/nsm/hostname-interface/snortu-1.log for clues and please post the exact rule syntax you are attempting to use. After viewing your redacted sostat it seems that the ICMP and UDP rules are triggering: Are you using SO with in a VM? 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. Generate some traffic to trigger the alert. 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 order to apply the threshold to all nodes, place the pillar in /opt/so/saltstack/local/pillar/global.sls. Revision 39f7be52. 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. How are they parsed? From https://docs.saltstack.com/en/latest/: Salt is a core component of Security Onion 2 as it manages all processes on all nodes. 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. Manager of Support and Professional Services. You signed in with another tab or window. If you try to disable the first two rules without disabling the third rule (which has flowbits:isset,ET.MSSQL) the third rule could never fire due to one of the first two rules needing to fire first. 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 Inside of /opt/so/saltstack/local/salt/strelka/rules/localrules, add your YARA rules. The signature id (SID) must be unique. All alerts are viewable in Alerts, Dashboards, Hunt, and Kibana. When you purchase products and services from us, you're helping to fund development of Security Onion! Salt is a new approach to infrastructure management built on a dynamic communication bus. If it is, then the most expedient measure may be to resolve the misconfiguration and then reinvestigate tuning. Salt sls files are in YAML format. 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. Security Onion is an open source suite of network security monitoring (NSM) tools for evaluating alerts, providing three core functions to the cybersecurity analyst: Full packet capture and data types Network-based and host-based intrusion detection systems Alert analysis tools Security Onion is a platform that allows you to monitor your network for security alerts. The durian (/ d r i n /, / dj r i n /) is the edible fruit of several tree species belonging to the genus Durio.There are 30 recognised Durio species, at least nine of which produce edible fruit. Default YARA rules are provided from Florian Roths signature-base Github repo at https://github.com/Neo23x0/signature-base. Been looking to add some custom YARA rules and have been following the docs https://docs.securityonion.net/en/2.3/local-rules.html?#id1 however I'm a little confused. The second only needs the $ character escaped to prevent bash from treating that as a variable. 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! > > => I do not know how to do your guilde line. Ingest. 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. To enable or disable SIDs for Suricata, the Salt idstools pillar can be used in the minion pillar file (/opt/so/saltstack/local/pillar/minions/_.sls). Then tune your IDS rulesets. However, generating custom traffic to test the alert can sometimes be a challenge. For more information, please see https://docs.saltproject.io/en/latest/topics/troubleshooting/yaml_idiosyncrasies.html. PFA local.rules. Default pillar file: This is the pillar file located under /opt/so/saltstack/default/pillar/. /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. See above for suppress examples. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. These policy types can be found in /etc/nsm/rules/downloaded.rules. If you pivot from that alert to the corresponding pcap you can verify the payload we sent. For example, suppose we want to disable SID 2100498. In the image below, we can see how we define some rules for an eval node. 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. (Archived 1/22) Tuning NIDS Rules in Security Onion Security Onion 7.5K subscribers 48 Dislike Share 1,465 views Dec 22, 2021 This video has been archived as of January 2022 - the latest. Also ensure you run rule-update on the machine. Global pillar file: This is the pillar file that can be used to make global pillar assignments to the nodes. Cleaning up local_rules.xml backup files older than 30 days. All the following will need to be run from the manager. Salt is a core component of Security Onion 2 as it manages all processes on all nodes. 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 is a intrusion detection and network monitoring tool. Security Onion offers the following choices for rulesets to be used by Snort/Suricata: 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 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. so-rule allows you to disable, enable, or modify NIDS rules. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. 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. Escalate local privileges to root level. The set of processes includes sguild, mysql, and optionally the Elastic stack (Elasticsearch, Logstash, Kibana) and Curator. 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 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. You need to configure Security Onion to send syslog so that InsightIDR can ingest it. Apply the firewall state to the node, or wait for the highstate to run for the changes to happen automatically. > To unsubscribe from this topic . At those times, it can be useful to query the database from the commandline. By default, only the analyst hostgroup is allowed access to the nginx ports. 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. 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,. idstools may seem like it is ignoring your disabled rules request if you try to disable a rule that has flowbits set. As you can see I have the Security Onion machine connected within the internal network to a hub. Please provide the output of sostat-redacted, attaching as a plain text file, or by using a service like Pastebin.com. 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. Diagnostic logs can be found in /opt/so/log/salt/. 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 unsubscribe from this group and stop receiving emails from it, send an email to. Security Onion Layers Ubuntu based OS Snort, Suricata Snorby Bro Sguil Squert . These non-manager nodes are referred to as salt minions. Run so-rule without any options to see the help output: We can use so-rule to modify an existing NIDS rule. Finally, run so-strelka-restart to allow Strelka to pull in the new rules. 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). Started by Doug Burks, and first released in 2009, Security Onion has. However, generating custom traffic to test the alert can sometimes be a challenge. Before You Begin. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. Security Onion includes best-of-breed free and open tools including Suricata, Zeek, Wazuh, the Elastic Stack and many others. Start by creating Berkeley Packet Filters (BPFs) to ignore any traffic that you don't want your network sensors to process. 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. There are two directories that contain the yaml files for the firewall configuration. 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. Security Onion a free and open platform for intrusion detection, enterprise security monitoring, and log management. When editing these files, please be very careful to respect YAML syntax, especially whitespace. Write your rule, see Rules Format and save it. Minion pillar file: This is the minion specific pillar file that contains pillar definitions for that node. 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. 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. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. 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 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. The error can be ignored as it is not an indication of any issue with the minions. Logs . 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, 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. Tried as per your syntax, but still issue persists. Any definitions made here will override anything defined in other pillar files, including global. and dont forget that the end is a semicolon and not a colon. 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 . In this file, the idstools section has a modify sub-section where you can add your modifications. Cannot retrieve contributors at this time. Host groups are similar to port groups but for storing lists of hosts that will be allowed to connect to the associated port groups. Interested in discussing how our products and services can help your organization? For example, if you include a bad custom snort rule with incorrect syntax, the snort engine will fail . You can see that we have an alert with the IP addresses we specified and the TCP ports we specified. These non-manager nodes are referred to as salt minions. Logs. In syslog-ng, the following configuration forwards all local logs to Security Onion. 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). Modifying these values outside of so-allow or so-firewall could lead to problems accessing your existing hosts. Security Onion is an open-source and free Linux distribution for log management, enterprise security monitoring, and intrusion detection. There are many ways to achieve age regression, but the three primary methods are: Botox. This first sub-section will discuss network firewalls outside of Security Onion. Please keep this value below 90 seconds otherwise systemd will reach timeout and terminate the service. 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. These are the files that will need to be changed in order to customize nodes. One of those regular interventions is to ensure that you are tuning properly and proactively attempting to reach an acceptable level of signal to noise. Open /etc/nsm/rules/local.rules using your favorite text editor. After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. c96 extractor. /opt/so/saltstack/local/salt/idstools/local.rules, "GPL ATTACK_RESPONSE id check returned root 2", /opt/so/saltstack/local/salt/strelka/rules, /opt/so/saltstack/local/salt/strelka/rules/localrules, /opt/so/saltstack/local/salt/strelka/rules/, https://github.com/Neo23x0/signature-base. 7.2. 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. Revision 39f7be52. Reboot into your new Security Onion installation and login using the username/password you specified in the previous step. However, the exception is now logged. You can add Wazuh HIDS rules in /opt/so/rules/hids/local_rules.xml. Local pillar file: This is the pillar file under /opt/so/saltstack/local/pillar/. If you were to add a search node, you would see its IP appear in both the minion and the search_node host groups. Now we have to build the association between the host group and the syslog port group and assign that to our sensor node. 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. . Adding local rules in Security Onion is a rather straightforward process. Within 15 minutes, Salt should then copy those rules into /opt/so/rules/nids/local.rules. This writeup contains a listing of important Security Onion files and directories. Now that we have a signature that will generate alerts a little more selectively, we need to disable the original signature. 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. Backing up current local_rules.xml file. For some alerts, your understanding of your own network and the business being transacted across it will be the deciding factor. A tag already exists with the provided branch name. A. /opt/so/saltstack/default/salt/firewall/assigned_hostgroups.map.yaml is where the default allow rules come together and pair hostgroups and portgroups and assign that pairing to a node based on its role in the grid. You can read more about this at https://redmine.openinfosecfoundation.org/issues/4377. Double-click the Setup script on the Desktop and follow the prompts to configure and start the Sguil processes. . If you would like to pull in NIDS rules from a MISP instance, please see: Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. 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. . 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. Start by creating Berkeley Packet Filters (BPFs) to ignore any traffic that you dont want your network sensors to process. Please update your bookmarks. IPS Policy Data collection Examination Answered by weslambert on Dec 15, 2021. 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. 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. On Thursday, June 15, 2017 at 5:06:51 PM UTC+5:30, Wes wrote: Is it simply not triggering, or causing an error? Copyright 2023 For example, if you dont care that users are accessing Facebook, then you can silence the policy-based signatures for Facebook access. Copyright 2023 Here are some of the items that can be customized with pillar settings: Currently, the salt-minion service startup is delayed by 30 seconds. 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. 4. "; 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). Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. We created and maintain Security Onion, so we know it better than anybody else. It is located at /opt/so/saltstack/local/pillar/global.sls. Security Onion includes best-of-breed free and open tools including Suricata, Zeek, Wazuh, the Elastic Stack and many others. 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. 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. As shown above, we edit the minion pillar and add the SID to the idstools - sids - disabled section. 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. https://securityonion.net/docs/AddingLocalRules. Previously, in the case of an exception, the code would just pass. 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 signed in with another tab or window. Another consideration is whether or not the traffic is being generated by a misconfigured piece of equipment. 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. Set anywhere from 5 to 12 in the local_rules Kevin. Adding Your Own Rules . Salt minions must be able to connect to the manager node on ports, /opt/so/saltstack/local/pillar/global.sls, /opt/so/saltstack/local/pillar/minions/.sls, https://docs.saltproject.io/en/getstarted/system/communication.html, https://docs.saltproject.io/en/latest/topics/troubleshooting/yaml_idiosyncrasies.html. This wiki is no longer maintained. /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. 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 Boot the ISO and run through the installer. For example, suppose that we want to modify SID 2100498 and replace any instances of returned root with returned root test. 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. 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. Security. jq; so-allow; so-elastic-auth; so . All node types are added to the minion host group to allow Salt communication.
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