/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. Please update your bookmarks. Now that we have a signature that will generate alerts a little more selectively, we need to disable the original signature. 3. Once your rules and alerts are under control, then check to see if you have packet loss. 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. This wiki is no longer maintained. 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. Copyright 2023 Files here should not be modified as changes would be lost during a code update. Give feedback. 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. For example, if you dont care that users are accessing Facebook, then you can silence the policy-based signatures for Facebook access. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. 41 - Network Segmentation, VLANs, and Subnets. 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. 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. Modifying these values outside of so-allow or so-firewall could lead to problems accessing your existing hosts. Please review the Salt section to understand pillars and templates. Find Age Regression Discord servers and make new friends! Run rule-update (this will merge local.rules into downloaded.rules, update. 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. If you want to tune Wazuh HIDS alerts, please see the Wazuh section. To add local YARA rules, create a directory in /opt/so/saltstack/local/salt/strelka/rules, for example localrules. . You may want to bump the SID into the 90,000,000 range and set the revision to 1. You need to configure Security Onion to send syslog so that InsightIDR can ingest it. This is an advanced case and you most likely wont never need to modify these files. 7.2. 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. 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. 3. 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. To unsubscribe from this group and stop receiving emails from it, send an email to. For some alerts, your understanding of your own network and the business being transacted across it will be the deciding factor. Salt can be used for data-driven orchestration, remote execution for any infrastructure, configuration management for any app stack, and much more. Enter the following sample in a line at a time. If you would like to pull in NIDS rules from a MISP instance, please see: 1. /opt/so/saltstack/default/salt/firewall/hostgroups.yaml is where the default hostgroups are defined. We created and maintain Security Onion, so we know it better than anybody else. This first sub-section will discuss network firewalls outside of Security Onion. Backing up current downloaded.rules file before it gets overwritten. Finally, from the manager, update the config on the remote node: You can manage threshold entries for Suricata using Salt pillars. If this is a distributed deployment, edit local.rules on your master server and it will replicate to your sensors. 1. Finally, run so-strelka-restart to allow Strelka to pull in the new rules. From https://docs.saltstack.com/en/latest/: Salt is a core component of Security Onion 2 as it manages all processes on all nodes. Here are some of the items that can be customized with pillar settings: Currently, the salt-minion service startup is delayed by 30 seconds. . Backing up current local_rules.xml file. 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. 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. Salt sls files are in YAML format. so-rule allows you to disable, enable, or modify NIDS rules. Double-click the Setup script on the Desktop and follow the prompts to configure and start the Sguil processes. Custom rules can be added to the local.rules file Rule threshold entries can . /opt/so/saltstack/default/salt/firewall/portgroups.yaml is where the default port groups are defined. Previously, in the case of an exception, the code would just pass. However, generating custom traffic to test the alert can sometimes be a challenge. ELSA? 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. /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. The error can be ignored as it is not an indication of any issue with the minions. Port groups are a way of grouping together ports similar to a firewall port/service alias. idstools helpfully resolves all of your flowbit dependencies, and in this case, is re-enabling that rule for you on the fly. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. Before You Begin. 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 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. Add the following to the sensor minion pillar file located at. 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 you were to add a search node, you would see its IP appear in both the minion and the search_node host groups. The set of processes includes sguild, mysql, and optionally the Elastic stack (Elasticsearch, Logstash, Kibana) and Curator. In Security Onion, locally created rules are stored in /opt/so/rules/nids/local.rules. Ingest. > > => I do not know how to do your guilde line. If you want to apply the threshold to a single node, place the pillar in /opt/so/saltstack/local/pillar/minions/.sls. Security Onion is a platform that allows you to monitor your network for security alerts. =========================================================================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=========================================================================. Naming convention: The collection of server processes has a server name separate from the hostname of the box. Copyright 2023 The second only needs the $ character escaped to prevent bash from treating that as a variable. 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 . Please note that Suricata 6 has a 64-character limitation on the IP field in a threshold. Download Security Onion 20110116. Inside of /opt/so/saltstack/local/salt/strelka/rules/localrules, add your YARA rules. According to NIST, which step in the digital forensics process involves drawing conclusions from data? PFA local.rules. A. Security Onion generates a lot of valuable information for you the second you plug it into a TAP or SPAN port. (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. 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 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). 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. . Revision 39f7be52. If so, then tune the number of AF-PACKET workers for sniffing processes. 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. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. In order to apply the threshold to all nodes, place the pillar in /opt/so/saltstack/local/pillar/global.sls. Where is it that you cannot view them? Salt is a core component of Security Onion 2 as it manages all processes on all nodes. This will add the host group to, Add the desired IPs to the host group. Now we have to build the association between the host group and the syslog port group and assign that to our sensor node. 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 . These non-manager nodes are referred to as salt minions. By default, only the analyst hostgroup is allowed access to the nginx ports. There are three alerting engines within Security Onion: Suricata, Wazuh and Playbook (Sigma). If you need to increase this delay, it can be done using the salt:minion:service_start_delay pillar. Interested in discussing how our products and services can help your organization? Write your rule, see Rules Format and save it. 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? Local pillar file: This is the pillar file under /opt/so/saltstack/local/pillar/. Start by creating Berkeley Packet Filters (BPFs) to ignore any traffic that you dont want your network sensors to process. There are two directories that contain the yaml files for the firewall configuration. Copyright 2023 Data collection Examination 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) Our products include both the Security Onion software and specialized hardware appliances that are built and tested to run Security Onion. 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. 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. 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. Revision 39f7be52. 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, consider the following rules that reference the ET.MSSQL flowbit. 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. idstools may seem like it is ignoring your disabled rules request if you try to disable a rule that has flowbits set. 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. Copyright 2023 Edit the /opt/so/rules/nids/local.rules file using vi or your favorite text editor: Paste the rule. In Security Onion, locally created rules are stored in /opt/so/rules/nids/local.rules. Saltstack states are used to ensure the state of objects on a minion. There isnt much in here other than anywhere, dockernet, localhost and self. lawson cedars. Logs. All alerts are viewable in Alerts, Dashboards, Hunt, and Kibana. Security Onion includes best-of-breed free and open tools including Suricata, Zeek, Wazuh, the Elastic Stack and many others. That's what we'll discuss in this section. 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. You signed in with another tab or window. 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 Then tune your IDS rulesets. 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. 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. 2. Add the following to the minions sls file located at. 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 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. Full Name. 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. /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. Host groups are similar to port groups but for storing lists of hosts that will be allowed to connect to the associated port groups. In 2008, Doug Burks started working on Security Onion, a Linux distribution for intrusion detection, network security monitoring, and log management. Answered by weslambert on Dec 15, 2021. It is now read-only. and dont forget that the end is a semicolon and not a colon. 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. 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. Security Onion uses idstools to download new signatures every night and process them against a set list of user generated configurations. 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, Generate some traffic to trigger the alert. 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. https://docs.securityonion.net/en/2.3/local-rules.html?#id1. Revision 39f7be52. 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 { 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. 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. > > > > > > > > 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. 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. On Thursday, June 15, 2017 at 5:06:51 PM UTC+5:30, Wes wrote: Is it simply not triggering, or causing an error? Our documentation has moved to https://securityonion.net/docs/. 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. When I run sostat. This section will cover both network firewalls outside of Security Onion and the host-based firewall built into Security Onion. If you would like to pull in NIDS rules from a MISP instance, please see the MISP Rules section. 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. Open /etc/nsm/rules/local.rules using your favorite text editor. Check out our NIDS tuning video at https://youtu.be/1jEkFIEUCuI! For example, if you include a bad custom snort rule with incorrect syntax, the snort engine will fail . the rule is missing a little syntax, maybe try: alert icmp any any -> $HOME_NET any (msg:"ICMP Testing"; sid:1000001; rev:1;). Let's add a simple rule that will alert on the detection of a string in a tcp session. Minion pillar file: This is the minion specific pillar file that contains pillar definitions for that node. All the following will need to be run from the manager. alert icmp any any -> any any (msg: "ICMP Testing"; sid:1000001; rev:1;). 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. This directory stores the firewall rules specific to your grid. Security Onion is a free and open platform for threat hunting, enterprise security monitoring, and log management. It . If you are on a large network, you may need to do additional tuning like pinning processes to CPU cores. For a Security Onion client, you should dedicate at least 2GB RAM, but ideally 4GB if possible. Another consideration is whether or not the traffic is being generated by a misconfigured piece of equipment. Long-term you should only run the rules necessary for > your environment. /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. This writeup contains a listing of important Security Onion files and directories. Pillars are a Saltstack concept, formatted typically in YAML, that can be used to parameterize states via templating. Revision 39f7be52. If you would like to create a rule yourself and use it with Suricata, this guide might be helpful. to security-onion When I run 'rule-update' it give an error that there are no rules in /usr/local/lib/snort_dynamicrules. 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. Adding local rules in Security Onion is a rather straightforward process. Do you see these alerts in Squert or ELSA? 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 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. Copyright 2023 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. And when I check, there are no rules there. After select all interfaces also ICMP logs not showing in sguil. 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. It incorporates NetworkMiner, CyberChef, Squert, Sguil, Wazuh, Bro, Suricata, Snort, Kibana, Logstash, Elasticsearch, and numerous other security onion tools. Firewall Requirements Salt minions must be able to connect to the manager node on ports 4505/tcp and 4506/tcp: In syslog-ng, the following configuration forwards all local logs to Security Onion. Salt sls files are in YAML format. 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. Manager of Support and Professional Services. Have you tried something like this, in case you are not getting traffic to $HOME_NET? 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. 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. 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. Salt is a new approach to infrastructure management built on a dynamic communication bus. 4. 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. In the configuration window, select the relevant form of Syslog - here, it's Syslog JSON - and click. A tag already exists with the provided branch name. Within 15 minutes, Salt should then copy those rules into /opt/so/rules/nids/local.rules. 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. Logs . The territories controlled by the ROC consist of 168 islands, with a combined area of 36,193 square . If you right click on the, You can learn more about snort and writing snort signatures from the. See above for suppress examples. 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. Security Onion. If it is, then the most expedient measure may be to resolve the misconfiguration and then reinvestigate tuning. 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. When you run so-allow or so-firewall, it modifies this file to include the IP provided in the proper hostgroup. Start by creating Berkeley Packet Filters (BPFs) to ignore any traffic that you don't want your network sensors to process. 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. 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. Boot the ISO and run through the installer.

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