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 { Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. This is an advanced case and you most likely wont never need to modify these files. 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. You can add NIDS rules in /opt/so/saltstack/local/salt/idstools/local.rules on your manager. And when I check, there are no rules there. Run rule-update (this will merge local.rules into downloaded.rules, update. As you can see I have the Security Onion machine connected within the internal network to a hub. This was implemented to avoid some issues that we have seen regarding Salt states that used the ip_interfaces grain to grab the management interface IP. lawson cedars. Escalate local privileges to root level. Default YARA rules are provided from Florian Roths signature-base Github repo at https://github.com/Neo23x0/signature-base. If this is a distributed deployment, edit local.rules on your master server and it will replicate to your sensors. Ingest. 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. For a quick primer on flowbits, see https://blog.snort.org/2011/05/resolving-flowbit-dependancies.html. . Assuming you have Internet access, Security Onion will automatically update your NIDS rules on a daily basis. The remainder of this section will cover the host firewall built into Security Onion. 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. All node types are added to the minion host group to allow Salt communication. For more information, please see https://docs.saltproject.io/en/latest/topics/troubleshooting/yaml_idiosyncrasies.html. This error now occurs in the log due to a change in the exception handling within Salts event module. Logs . Edit the /opt/so/rules/nids/local.rules file using vi or your favorite text editor: Paste the rule. idstools may seem like it is ignoring your disabled rules request if you try to disable a rule that has flowbits set. You may want to bump the SID into the 90,000,000 range and set the revision to 1. If you are on a large network, you may need to do additional tuning like pinning processes to CPU cores. . 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 Adding local rules in Security Onion is a rather straightforward process. 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 Peel Back the Layers of Your Enterprise Monday, January 26, 2009 Integrating Snort 3.0 (SnortSP) and Sguil in 3 Steps So once you have Snort 3.0 installed, what can you do with it? 4. /opt/so/saltstack/default/salt/firewall/portgroups.yaml is where the default port groups are defined. 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. How are they parsed? Finally, from the manager, update the config on the remote node: You can manage threshold entries for Suricata using Salt pillars. 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) Check out our NIDS tuning video at https://youtu.be/1jEkFIEUCuI! Have you tried something like this, in case you are not getting traffic to $HOME_NET? Security Onion is a free and open source platform for threat hunting, network security monitoring, and log management. Please review the Salt section to understand pillars and templates. Some node types get their IP assigned to multiple host groups. 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. If you were to add a search node, you would see its IP appear in both the minion and the search_node host groups. Open /etc/nsm/rules/local.rules using your favorite text editor. MISP Rules. c96 extractor. In 2008, Doug Burks started working on Security Onion, a Linux distribution for intrusion detection, network security monitoring, and log management. The server is also responsible for ruleset management. However, generating custom traffic to test the alert can sometimes be a challenge. The error can be ignored as it is not an indication of any issue with the minions. Pillars are a Saltstack concept, formatted typically in YAML, that can be used to parameterize states via templating. The signature id (SID) must be unique. /opt/so/saltstack/local/salt/firewall/portgroups.local.yaml defines custom port groups. There are three alerting engines within Security Onion: Suricata, Wazuh and Playbook (Sigma). Copyright 2023 Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. 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. In Security Onion, locally created rules are stored in /opt/so/rules/nids/local.rules. According to NIST, which step in the digital forensics process involves drawing conclusions from data? The county seat is in Evansville. Start creating a file for your rule. For example, consider the following rules that reference the ET.MSSQL flowbit. If you built the rule correctly, then snort should be back up and running. 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. Security Onion Layers Ubuntu based OS Snort, Suricata Snorby Bro Sguil Squert 41 - Network Segmentation, VLANs, and Subnets. Logs. By default, only the analyst hostgroup is allowed access to the nginx ports. Now that we have a signature that will generate alerts a little more selectively, we need to disable the original signature. 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. You are an adult, at least 18 years of age, you are familiar with and understand the standards and laws of your local community regarding sexually-oriented media. The territories controlled by the ROC consist of 168 islands, with a combined area of 36,193 square . This first sub-section will discuss network firewalls outside of Security Onion. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Also ensure you run rule-update on the machine. 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. Set anywhere from 5 to 12 in the local_rules Kevin. Data collection Examination However, generating custom traffic to test the alert can sometimes be a challenge. When I run sostat. If . If you would like to pull in NIDS rules from a MISP instance, please see the MISP Rules section. in Sguil? Previously, in the case of an exception, the code would just pass. You can see that we have an alert with the IP addresses we specified and the TCP ports we specified. https://securityonion.net/docs/AddingLocalRules. 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. All alerts are viewable in Alerts, Dashboards, Hunt, and Kibana. You signed in with another tab or window. 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. If so, then tune the number of AF-PACKET workers for sniffing processes. 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 . 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. Now we have to build the association between the host group and the syslog port group and assign that to our sensor node. 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). . We offer both training and support for Security Onion. Adding local rules in Security Onion is a rather straightforward process. idstools helpfully resolves all of your flowbit dependencies, and in this case, is re-enabling that rule for you on the fly. 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. After viewing your redacted sostat it seems that the ICMP and UDP rules are triggering: Are you using SO with in a VM? You signed in with another tab or window. 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. and dont forget that the end is a semicolon and not a colon. 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. 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. Reboot into your new Security Onion installation and login using the username/password you specified in the previous step. 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). Hi @Trash-P4nda , I've just updated the documentation to be clearer. 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. Download Security Onion 20110116. These are the files that will need to be changed in order to customize nodes. To add local YARA rules, create a directory in /opt/so/saltstack/local/salt/strelka/rules, for example localrules. 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. /opt/so/saltstack/default/salt/firewall/hostgroups.yaml is where the default hostgroups are defined. 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. I've just updated the documentation to be clearer. Boot the ISO and run through the installer. 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. For some alerts, your understanding of your own network and the business being transacted across it will be the deciding factor. 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. As shown above, we edit the minion pillar and add the SID to the idstools - sids - disabled section. Enter the following sample in a line at a time. You can find the latest version of this page at: https://securityonion.net/docs/AddingLocalRules. 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 PFA local.rules. You may want to bump the SID into the 90,000,000 range and set the revision to 1. 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. If you dont want to wait 15 minutes, you can force the sensors to update immediately by running the following command on your manager node: Security Onion offers the following choices for rulesets to be used by Suricata. =========================================================================Top 50 All time Sguil Events=========================================================================Totals GenID:SigID Signature1686 1:1000003 UDP Testing Rule646 1:1000001 ICMP Testing Rule2 1:2019512 ET POLICY Possible IP Check api.ipify.org1 1:2100498 GPL ATTACK_RESPONSE id check returned rootTotal2335, =========================================================================Last update=========================================================================. Revision 39f7be52. 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. 3. 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). You can add Wazuh HIDS rules in /opt/so/rules/hids/local_rules.xml. 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. Within 15 minutes, Salt should then copy those rules into /opt/so/rules/nids/local.rules. 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. Between Zeek logs, alert data from Suricata, and full packet capture from Stenographer, you have enough information to begin identifying areas of interest and making positive changes to your security stance. From https://docs.saltstack.com/en/latest/: Salt is a core component of Security Onion 2 as it manages all processes on all nodes. 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. More information on each of these topics can be found in this section. For example, suppose that we want to modify SID 2100498 and replace any instances of returned root with returned root test. If you would like to pull in NIDS rules from a MISP instance, please see: Copyright 2023 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. Security Onion is a platform that allows you to monitor your network for security alerts. You received this message because you are subscribed to the Google Groups "security-onion" group. Global pillar file: This is the pillar file that can be used to make global pillar assignments to the nodes. These policy types can be found in /etc/nsm/rules/downloaded.rules. 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. Security Onion has Snort built in and therefore runs in the same instance. However, generating custom traffic to test the alert can sometimes be a challenge. 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. Modifying these values outside of so-allow or so-firewall could lead to problems accessing your existing hosts. Manager of Support and Professional Services. Our appliances will save you and your team time and resources, allowing you to focus on keeping your organization secure. It is located at /opt/so/saltstack/local/pillar/global.sls. . Are you sure you want to create this branch? 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 . Apply the firewall state to the node, or wait for the highstate to run for the changes to happen automatically. 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. After select all interfaces also ICMP logs not showing in sguil. . 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. Naming convention: The collection of server processes has a server name separate from the hostname of the box. Security Onion is a intrusion detection and network monitoring tool. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. 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. There isnt much in here other than anywhere, dockernet, localhost and self. Then tune your IDS rulesets. Another consideration is whether or not the traffic is being generated by a misconfigured piece of equipment. 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. It incorporates NetworkMiner, CyberChef, Squert, Sguil, Wazuh, Bro, Suricata, Snort, Kibana, Logstash, Elasticsearch, and numerous other security onion tools. See above for suppress examples. Revision 39f7be52. 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. Start by creating Berkeley Packet Filters (BPFs) to ignore any traffic that you dont want your network sensors to process. Youll need to ensure the first of the two properly escapes any characters that would be interpreted by regex. 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. 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 Home About Us Bill Pay 877-213-8180 Product Library My accountItems of interest (0) Get your campus card Your campus card allows you to borrow books from the Library, use services at the student centre, make payments at Macquarie University retail outlets, and identify yourself during class tests and . 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 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. 7.2. Write your rule, see Rules Format and save it. Beta You could try testing a rule . To unsubscribe from this group and stop receiving emails from it, send an email to. How are they stored? When you purchase products and services from us, you're helping to fund development of Security Onion! The default allow rules for each node are defined by its role (manager, searchnode, sensor, heavynode, etc) in the grid. 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 All the following will need to be run from the manager. That's what we'll discuss in this section. Inside of /opt/so/saltstack/local/salt/strelka/rules/localrules, add your YARA rules. For a Security Onion client, you should dedicate at least 2GB RAM, but ideally 4GB if possible. 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. 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. The files in this directory should not be modified as they could possibly be overwritten during a soup update in the event we update those files. Find Age Regression Discord servers and make new friends! This is located at /opt/so/saltstack/local/pillar/minions/.sls. This will add the host group to, Add the desired IPs to the host group. Minion pillar file: This is the minion specific pillar file that contains pillar definitions for that node. This directory stores the firewall rules specific to your grid. 1. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. There are two directories that contain the yaml files for the firewall configuration. 3. Security Onion is an open-source and free Linux distribution for log management, enterprise security monitoring, and intrusion detection. When you run so-allow or so-firewall, it modifies this file to include the IP provided in the proper hostgroup. 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. I went ahead and put in the below rules under /etc/nsm/local.rules and ran the rule-update command. You signed in with another tab or window. 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 it is, then the most expedient measure may be to resolve the misconfiguration and then reinvestigate tuning. 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 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. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. When editing these files, please be very careful to respect YAML syntax, especially whitespace. You can learn more about snort and writing snort signatures from the Snort Manual. Start by creating Berkeley Packet Filters (BPFs) to ignore any traffic that you don't want your network sensors to process. (Alternatively, you can press Ctrl+Alt+T to open a new shell.) Then tune your IDS rulesets. 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. 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. 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,. /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. 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.