We've been teaching Security Onion classes and providing Professional Services since 2014. 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 { Security Onion. 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). For example, suppose that we want to modify SID 2100498 and replace any instances of returned root with returned root test. This first sub-section will discuss network firewalls outside of Security Onion. 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. Pillars are a Saltstack concept, formatted typically in YAML, that can be used to parameterize states via templating. Please note that Suricata 6 has a 64-character limitation on the IP field in a threshold. To add local YARA rules, create a directory in /opt/so/saltstack/local/salt/strelka/rules, for example localrules. > > => I do not know how to do your guilde line. Generate some traffic to trigger the alert. Finally, run so-strelka-restart to allow Strelka to pull in the new rules. When I run sostat. The remainder of this section will cover the host firewall built into Security Onion. Security Onion generates a lot of valuable information for you the second you plug it into a TAP or SPAN port. /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. Edit the /opt/so/rules/nids/local.rules file using vi or your favorite text editor: Paste the rule. Let's add a simple rule that will alert on the detection of a string in a tcp session. 41 - Network Segmentation, VLANs, and Subnets. Our products include both the Security Onion software and specialized hardware appliances that are built and tested to run Security Onion. 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. Security Onion is a free and open source platform for threat hunting, network security monitoring, and log management. Long-term you should only run the rules necessary for > your environment. Any definitions made here will override anything defined in other pillar files, including global. Open /etc/nsm/rules/local.rules using your favorite text editor. 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. The signature id (SID) must be unique. Assuming you have Internet access, Security Onion will automatically update your NIDS rules on a daily basis. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. This section will cover both network firewalls outside of Security Onion and the host-based firewall built into Security Onion. 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. 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. idstools helpfully resolves all of your flowbit dependencies, and in this case, is re-enabling that rule for you on the fly. Are you sure you want to create this branch? When you run so-allow or so-firewall, it modifies this file to include the IP provided in the proper hostgroup. This directory stores the firewall rules specific to your grid. Salt sls files are in YAML format. MISP Rules. For example, suppose we want to disable SID 2100498. This way, you still have the basic ruleset, but the situations in which they fire are altered. Next, run so-yara-update to pull down the rules. 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 Check out our NIDS tuning video at https://youtu.be/1jEkFIEUCuI! Host groups are similar to port groups but for storing lists of hosts that will be allowed to connect to the associated port groups. . From https://docs.saltstack.com/en/latest/: Salt is a core component of Security Onion 2 as it manages all processes on all nodes. . You can learn more about scapy at secdev.org and itgeekchronicles.co.uk. However, generating custom traffic to test the alert can sometimes be a challenge. More information on each of these topics can be found in this section. Our documentation has moved to https://securityonion.net/docs/. 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. Full Name. Copyright 2023 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. Double-click the Setup script on the Desktop and follow the prompts to configure and start the Sguil processes. Previously, in the case of an exception, the code would just pass. Port groups are a way of grouping together ports similar to a firewall port/service alias. Write your rule, see Rules Format and save it. Saltstack states are used to ensure the state of objects on a minion. Start creating a file for your rule. As shown above, we edit the minion pillar and add the SID to the idstools - sids - disabled section. 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. 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. Add the following to the sensor minion pillar file located at. The territories controlled by the ROC consist of 168 islands, with a combined area of 36,193 square . Generate some traffic to trigger the alert. This error now occurs in the log due to a change in the exception handling within Salts event module. In the image below, we can see how we define some rules for an eval node. 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 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. Global pillar file: This is the pillar file that can be used to make global pillar assignments to the nodes. Now that the configuration is in place, you can either wait for the sensor to sync with Salt running on the manager, or you can force it to update its firewall by running the following from the manager: Add the required ports to the port group. 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 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. 2. . Tracking. PFA local.rules. 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. See above for suppress examples. This will add the host group to, Add the desired IPs to the host group. It . Youll need to ensure the first of the two properly escapes any characters that would be interpreted by regex. For more information, please see https://docs.saltproject.io/en/latest/topics/troubleshooting/yaml_idiosyncrasies.html. 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. 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. After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. /opt/so/saltstack/default/salt/firewall/portgroups.yaml is where the default port groups are defined. If you want to apply the threshold to a single node, place the pillar in /opt/so/saltstack/local/pillar/minions/.sls. Check your syslog-ng configuration for the name of the local log source ("src" is used on SUSE systems). You can see that we have an alert with the IP addresses we specified and the TCP ports we specified. 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. 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. There isnt much in here other than anywhere, dockernet, localhost and self. At those times, it can be useful to query the database from the commandline. 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. 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? How are they parsed? 1. Salt is a core component of Security Onion 2 as it manages all processes on all nodes. 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 However, generating custom traffic to test the alert can sometimes be a challenge. We offer both training and support for Security Onion. Cannot retrieve contributors at this time. 3. Our appliances will save you and your team time and resources, allowing you to focus on keeping your organization secure. Security Onion has Snort built in and therefore runs in the same instance. 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. 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. epic charting system training Before You Begin. Custom rules can be added to the local.rules file Rule threshold entries can . 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. Any line beginning with "#" can be ignored as it is a comment. Once logs are generated by network sniffing processes or endpoints, where do they go? Security Onion a free and open platform for intrusion detection, enterprise security monitoring, and log management. 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. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. 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. 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 unsubscribe from this group and stop receiving emails from it, send an email to security-onio.@googlegroups.com. Files here should not be modified as changes would be lost during a code update. Revision 39f7be52. 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 . 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. 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. 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. Revision 39f7be52. jq; so-allow; so-elastic-auth; so . Please review the Salt section to understand pillars and templates. 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. The county seat is in Evansville. Please note! You can find the latest version of this page at: https://securityonion.net/docs/AddingLocalRules. Start by creating Berkeley Packet Filters (BPFs) to ignore any traffic that you don't want your network sensors to process. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. Please provide the output of sostat-redacted, attaching as a plain text file, or by using a service like Pastebin.com. If you would like to pull in NIDS rules from a MISP instance, please see: If . We created and maintain Security Onion, so we know it better than anybody else. For example, if you dont care that users are accessing Facebook, then you can silence the policy-based signatures for Facebook access. 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. Security Onion uses idstools to download new signatures every night and process them against a set list of user generated configurations. Security Onion Layers Ubuntu based OS Snort, Suricata Snorby Bro Sguil Squert 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,. 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). 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 is a platform that allows you to monitor your network for security alerts. Revision 39f7be52. idstools may seem like it is ignoring your disabled rules request if you try to disable a rule that has flowbits set. the rule is missing a little syntax, maybe try: alert icmp any any -> $HOME_NET any (msg:"ICMP Testing"; sid:1000001; rev:1;). Copyright 2023 That's what we'll discuss in this section. In Security Onion, locally created rules are stored in /opt/so/rules/nids/local.rules. These non-manager nodes are referred to as salt minions. 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, You signed in with another tab or window. Modifying these values outside of so-allow or so-firewall could lead to problems accessing your existing hosts. One thing you can do with it (and the one that most people are interested in) is to configure it for IDS mode. Set anywhere from 5 to 12 in the local_rules Kevin. Identification. You may want to bump the SID into the 90,000,000 range and set the revision to 1. Find Age Regression Discord servers and make new friends! You could try testing a rule . 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. Some node types get their IP assigned to multiple host groups. 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. Logs. https://securityonion.net/docs/AddingLocalRules. You can add Wazuh HIDS rules in /opt/so/rules/hids/local_rules.xml. Manager of Support and Professional Services. Salt sls files are in YAML format. 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. Logs . Add the following to the minions sls file located at. If you would like to create a rule yourself and use it with Suricata, this guide might be helpful. IPS Policy Backing up current local_rules.xml file. There are many ways to achieve age regression, but the three primary methods are: Botox. . You can learn more about snort and writing snort signatures from the Snort Manual. 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. /opt/so/saltstack/local/salt/firewall/portgroups.local.yaml defines custom port groups. Managing Rules; Adding Local Rules; Managing Alerts; High Performance Tuning; Tricks and Tips. and dont forget that the end is a semicolon and not a colon. Then tune your IDS rulesets. Adding Your Own Rules . To get the best performance out of Security Onion, youll want to tune it for your environment. 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. This writeup contains a listing of important Security Onion files and directories. You signed in with another tab or window. In this file, the idstools section has a modify sub-section where you can add your modifications. If you want to tune Wazuh HIDS alerts, please see the Wazuh section. 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. In a distributed deployment, the manager node controls all other nodes via salt. Answered by weslambert on Dec 15, 2021. There are two directories that contain the yaml files for the firewall configuration. . How are they stored? 7.2. Adding local rules in Security Onion is a rather straightforward process. Where is it that you cannot view them? 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). . Revision 39f7be52. 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 Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. As you can see I have the Security Onion machine connected within the internal network to a hub. Within 15 minutes, Salt should then copy those rules into /opt/so/rules/nids/local.rules. 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. For some alerts, your understanding of your own network and the business being transacted across it will be the deciding factor. 3. 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. The set of processes includes sguild, mysql, and optionally the Elastic stack (Elasticsearch, Logstash, Kibana) and Curator. These non-manager nodes are referred to as salt minions. When editing these files, please be very careful to respect YAML syntax, especially whitespace. 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. c96 extractor. 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. Ingest. I've just updated the documentation to be clearer. Give feedback. Now we have to build the association between the host group and the syslog port group and assign that to our sensor node. 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. alert icmp any any -> any any (msg: "ICMP Testing"; sid:1000001; rev:1;). Backing up current downloaded.rules file before it gets overwritten. For example, if you include a bad custom snort rule with incorrect syntax, the snort engine will fail . If so, then tune the number of AF-PACKET workers for sniffing processes. You received this message because you are subscribed to the Google Groups "security-onion" group. When you purchase products and services from us, you're helping to fund development of 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. Firewall Requirements Salt minions must be able to connect to the manager node on ports 4505/tcp and 4506/tcp: When editing these files, please be very careful to respect YAML syntax, especially whitespace. If you are on a large network, you may need to do additional tuning like pinning processes to CPU cores. In 2008, Doug Burks started working on Security Onion, a Linux distribution for intrusion detection, network security monitoring, and log management. By default, only the analyst hostgroup is allowed access to the nginx ports. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. 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. 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! It incorporates NetworkMiner, CyberChef, Squert, Sguil, Wazuh, Bro, Suricata, Snort, Kibana, Logstash, Elasticsearch, and numerous other security onion tools. This wiki is no longer maintained. 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 ->. Boot the ISO and run through the installer. 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. In Security Onion, locally created rules are stored in /opt/so/rules/nids/local.rules. to security-onion When I run 'rule-update' it give an error that there are no rules in /usr/local/lib/snort_dynamicrules. Enter the following sample in a line at a time. Security Onion offers the following choices for rulesets to be used by Suricata. In syslog-ng, the following configuration forwards all local logs to Security Onion. 5. 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. /opt/so/saltstack/default/salt/firewall/hostgroups.yaml is where the default hostgroups are defined. This is an advanced case and you most likely wont never need to modify these files. Use one of the following examples in your console/terminal window: sudo nano local.rules sudo vim local.rules. > > > > > > > > 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.