security onion local rules security onion local rules

The remainder of this section will cover the host firewall built into Security Onion. Revision 39f7be52. 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. 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. You may want to bump the SID into the 90,000,000 range and set the revision to 1. 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. 3. Full Name. When you purchase products and services from us, you're helping to fund development of Security Onion! 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. 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. 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. 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. 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. Revision 39f7be52. https://securityonion.net/docs/AddingLocalRules. PFA local.rules. Security Onion Layers Ubuntu based OS Snort, Suricata Snorby Bro Sguil Squert Before You Begin. 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. 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. Default pillar file: This is the pillar file located under /opt/so/saltstack/default/pillar/. Copyright 2023 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. idstools helpfully resolves all of your flowbit dependencies, and in this case, is re-enabling that rule for you on the fly. Naming convention: The collection of server processes has a server name separate from the hostname of the box. By default, only the analyst hostgroup is allowed access to the nginx ports. 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 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. Answered by weslambert on Dec 15, 2021. Some node types get their IP assigned to multiple host groups. However, generating custom traffic to test the alert can sometimes be a challenge. Have you tried something like this, in case you are not getting traffic to $HOME_NET? Please update your bookmarks. 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. Tried as per your syntax, but still issue persists. If you would like to create a rule yourself and use it with Suricata, this guide might be helpful. /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. After viewing your redacted sostat it seems that the ICMP and UDP rules are triggering: Are you using SO with in a VM? There are many ways to achieve age regression, but the three primary methods are: Botox. You can add Wazuh HIDS rules in /opt/so/rules/hids/local_rules.xml. Please note that Suricata 6 has a 64-character limitation on the IP field in a threshold. Port groups are a way of grouping together ports similar to a firewall port/service alias. 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. 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. More information on each of these topics can be found in this section. Managing Rules; Adding Local Rules; Managing Alerts; High Performance Tuning; Tricks and Tips. 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. . 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,. Please note! 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. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. Add the following to the sensor minion pillar file located at. In the configuration window, select the relevant form of Syslog - here, it's Syslog JSON - and click. 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. Cleaning up local_rules.xml backup files older than 30 days. /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. Edit the /opt/so/rules/nids/local.rules file using vi or your favorite text editor: Paste the rule. Security Onion is a free and open source platform for threat hunting, network security monitoring, and log management. 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 You can read more about this at https://redmine.openinfosecfoundation.org/issues/4377. In syslog-ng, the following configuration forwards all local logs to Security Onion. I went ahead and put in the below rules under /etc/nsm/local.rules and ran the rule-update command. 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! Security Onion a free and open platform for intrusion detection, enterprise security monitoring, and log management. Our documentation has moved to https://securityonion.net/docs/. Within 15 minutes, Salt should then copy those rules into /opt/so/rules/nids/local.rules. To enabled them, either revert the policy by remarking the ips_policy line (and run rule-update), or add the policy type to the rules in local.rules. You can see that we have an alert with the IP addresses we specified and the TCP ports we specified. 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. 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 configure syslog for Security Onion: Stop the Security Onion service. . 1. Generate some traffic to trigger the alert. Adding local rules in Security Onion is a rather straightforward process. Reboot into your new Security Onion installation and login using the username/password you specified in the previous step. For example, suppose we want to disable SID 2100498. in Sguil? When you run so-allow or so-firewall, it modifies this file to include the IP provided in the proper hostgroup. We created and maintain Security Onion, so we know it better than anybody else. Adding local rules in Security Onion is a rather straightforward process. Finally, from the manager, update the config on the remote node: You can manage threshold entries for Suricata using Salt pillars. Logs. Another consideration is whether or not the traffic is being generated by a misconfigured piece of equipment. For some alerts, your understanding of your own network and the business being transacted across it will be the deciding factor. 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. You can learn more about scapy at secdev.org and itgeekchronicles.co.uk. Introduction Adding local rules in Security Onion is a rather straightforward process. This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. If you were to add a search node, you would see its IP appear in both the minion and the search_node host groups. Security Onion is a platform that allows you to monitor your network for security alerts. 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. It . We offer both training and support for Security Onion. This will add the host group to, Add the desired IPs to the host group. Apply the firewall state to the node, or wait for the highstate to run for the changes to happen automatically. Files here should not be modified as changes would be lost during a code update. Manager of Support and Professional Services. Let's add a simple rule that will alert on the detection of a string in a tcp session. 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. Beta Revision 39f7be52. . 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. Local pillar file: This is the pillar file under /opt/so/saltstack/local/pillar/. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. You signed in with another tab or window. This wiki is no longer maintained. 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 . And when I check, there are no rules there. The county seat is in Evansville. You can learn more about snort and writing snort signatures from the Snort Manual. To generate traffic we are going to use the python library scapy to craft packets with specific information to ensure we trigger the alert with the information we want: Craft the layer 2 information. Any definitions made here will override anything defined in other pillar files, including global. 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. Our products include both the Security Onion software and specialized hardware appliances that are built and tested to run Security Onion. Once your rules and alerts are under control, then check to see if you have packet loss. We've been teaching Security Onion classes and providing Professional Services since 2014. To add local YARA rules, create a directory in /opt/so/saltstack/local/salt/strelka/rules, for example localrules. Here are some of the items that can be customized with pillar settings: Currently, the salt-minion service startup is delayed by 30 seconds. After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. 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 Revision 39f7be52. 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. For example, consider the following rules that reference the ET.MSSQL flowbit. Set anywhere from 5 to 12 in the local_rules Kevin. 41 - Network Segmentation, VLANs, and Subnets. Security Onion is a free and open platform for threat hunting, enterprise security monitoring, and log management. However, generating custom traffic to test the alert can sometimes be a challenge. 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. Where is it that you cannot view them? 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 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. For example, if you include a bad custom snort rule with incorrect syntax, the snort engine will fail . 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. 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. 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. 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. idstools may seem like it is ignoring your disabled rules request if you try to disable a rule that has flowbits set. 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 /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. Copyright 2023 For a quick primer on flowbits, see https://blog.snort.org/2011/05/resolving-flowbit-dependancies.html. 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. 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. (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. 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. Next, run so-yara-update to pull down the rules. lawson cedars. Cannot retrieve contributors at this time. 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). 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. the rule is missing a little syntax, maybe try: alert icmp any any -> $HOME_NET any (msg:"ICMP Testing"; sid:1000001; rev:1;). 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. 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. Any pointers would be appreciated. If you pivot from that alert to the corresponding pcap you can verify the payload we sent. Start by creating Berkeley Packet Filters (BPFs) to ignore any traffic that you dont want your network sensors to process. All alerts are viewable in Alerts, Dashboards, Hunt, and Kibana. Please provide the output of sostat-redacted, attaching as a plain text file, or by using a service like Pastebin.com. epic charting system training I've just updated the documentation to be clearer. Start creating a file for your rule. According to NIST, which step in the digital forensics process involves drawing conclusions from data? Are you sure you want to create this branch? When I run sostat. Also ensure you run rule-update on the machine. Write your rule, see Rules Format and save it. 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). Add the following to the minions sls file located at. The territories controlled by the ROC consist of 168 islands, with a combined area of 36,193 square . If you are on a large network, you may need to do additional tuning like pinning processes to CPU cores. 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). As you can see I have the Security Onion machine connected within the internal network to a hub. The server is also responsible for ruleset management. 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. 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 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. Security Onion is an open-source and free Linux distribution for log management, enterprise security monitoring, and intrusion detection. There isnt much in here other than anywhere, dockernet, localhost and self. 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. Revision 39f7be52. Boot the ISO and run through the installer. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. 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. Check out our NIDS tuning video at https://youtu.be/1jEkFIEUCuI! You received this message because you are subscribed to the Google Groups "security-onion" group. Then tune your IDS rulesets. How are they stored? Saltstack states are used to ensure the state of objects on a minion. 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 ->. Use one of the following examples in your console/terminal window: sudo nano local.rules sudo vim local.rules. 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. 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. After select all interfaces also ICMP logs not showing in sguil. This repository has been archived by the owner on Apr 16, 2021. 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). 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 . Was this translation helpful? /opt/so/saltstack/default/salt/firewall/hostgroups.yaml is where the default hostgroups are defined. https://docs.securityonion.net/en/2.3/local-rules.html?#id1. 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.