Salt sls files are in YAML format. From https://docs.saltstack.com/en/latest/: Salt is a core component of Security Onion 2 as it manages all processes on all nodes. MISP Rules. Double-click the Setup script on the Desktop and follow the prompts to configure and start the Sguil processes. However, generating custom traffic to test the alert can sometimes be a challenge. 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 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. If you would like to pull in NIDS rules from a MISP instance, please see: https://securityonion.net/docs/AddingLocalRules. All node types are added to the minion host group to allow Salt communication. All the following will need to be run from the manager. How are they parsed? Next, run so-yara-update to pull down the rules. 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. Logs. 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. Add the following to the minions sls file located at. /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. Cleaning up local_rules.xml backup files older than 30 days. Tried as per your syntax, but still issue persists. 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. This error now occurs in the log due to a change in the exception handling within Salts event module. Port groups are a way of grouping together ports similar to a firewall port/service alias. However, the exception is now logged. 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. Security Onion includes best-of-breed free and open tools including Suricata, Zeek, Wazuh, the Elastic Stack and many others. Security Onion is a intrusion detection and network monitoring tool. Another consideration is whether or not the traffic is being generated by a misconfigured piece of equipment. Check out our NIDS tuning video at https://youtu.be/1jEkFIEUCuI! 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. /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. 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. Naming convention: The collection of server processes has a server name separate from the hostname of the box. Then tune your IDS rulesets. One thing you can do with it (and the one that most people are interested in) is to configure it for IDS mode. For example, if you include a bad custom snort rule with incorrect syntax, the snort engine will fail . Generate some traffic to trigger the alert. Some node types get their IP assigned to multiple host groups. It incorporates NetworkMiner, CyberChef, Squert, Sguil, Wazuh, Bro, Suricata, Snort, Kibana, Logstash, Elasticsearch, and numerous other security onion tools. You need to configure Security Onion to send syslog so that InsightIDR can ingest it. You can see that we have an alert with the IP addresses we specified and the TCP ports we specified. Managing Rules; Adding Local Rules; Managing Alerts; High Performance Tuning; Tricks and Tips. It is now read-only. Please note! Please provide the output of sostat-redacted, attaching as a plain text file, or by using a service like Pastebin.com. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. 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 . 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. 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. 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. 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. ELSA? . You can add NIDS rules in /opt/so/saltstack/local/salt/idstools/local.rules on your manager. To verify the Snort version, type in snort -Vand hit Enter. For example, if you dont care that users are accessing Facebook, then you can silence the policy-based signatures for Facebook access. 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. After select all interfaces also ICMP logs not showing in sguil. Previously, in the case of an exception, the code would just pass. Interested in discussing how our products and services can help your organization? From the Command Line. 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. Was this translation helpful? Revision 39f7be52. Try checking /var/log/nsm/hostname-interface/snortu-1.log for clues and please post the exact rule syntax you are attempting to use. It is located at /opt/so/saltstack/local/pillar/global.sls. Enter the following sample in a line at a time. Youll need to ensure the first of the two properly escapes any characters that would be interpreted by regex. 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. Ingest. This is located at /opt/so/saltstack/local/pillar/minions/.sls. lawson cedars. 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. 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. 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. Adding local rules in Security Onion is a rather straightforward process. Let's add a simple rule that will alert on the detection of a string in a tcp session. This directory contains the default firewall rules. 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) The remainder of this section will cover the host firewall built into Security Onion. Any definitions made here will override anything defined in other pillar files, including global. Saltstack states are used to ensure the state of objects on a minion. For example, to check disk space on all nodes: If you want to force a node to do a full update of all salt states, you can run so-checkin. In 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. Started by Doug Burks, and first released in 2009, Security Onion has. Check your syslog-ng configuration for the name of the local log source ("src" is used on SUSE systems). 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. 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. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. If so, then tune the number of AF-PACKET workers for sniffing processes. 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. 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,. Boot the ISO and run through the installer. Finally, run so-strelka-restart to allow Strelka to pull in the new rules. 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. alert icmp any any -> any any (msg: "ICMP Testing"; sid:1000001; rev:1;). If you are on a large network, you may need to do additional tuning like pinning processes to CPU cores. Introduction Adding local rules in Security Onion is a rather straightforward process. 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. Then tune your IDS rulesets. Do you see these alerts in Squert or ELSA? To configure syslog for Security Onion: Stop the Security Onion service. 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. More information on each of these topics can be found in this section. In syslog-ng, the following configuration forwards all local logs to Security Onion. Security Onion. 41 - Network Segmentation, VLANs, and Subnets. 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. 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. This wiki is no longer maintained. =========================================================================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=========================================================================. Also ensure you run rule-update on the machine. Local pillar file: This is the pillar file under /opt/so/saltstack/local/pillar/. 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. 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. Use one of the following examples in your console/terminal window: sudo nano local.rules sudo vim local.rules. Revision 39f7be52. Salt sls files are in YAML format. For example, consider the following rules that reference the ET.MSSQL flowbit. If it is, then the most expedient measure may be to resolve the misconfiguration and then reinvestigate tuning. Start by creating Berkeley Packet Filters (BPFs) to ignore any traffic that you don't want your network sensors to process. It . 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! PFA local.rules. Give feedback. This way, you still have the basic ruleset, but the situations in which they fire are altered. /opt/so/saltstack/default/salt/firewall/portgroups.yaml is where the default port groups are defined. When editing these files, please be very careful to respect YAML syntax, especially whitespace. to security-onion When I run 'rule-update' it give an error that there are no rules in /usr/local/lib/snort_dynamicrules. You signed in with another tab or window. Pillars are a Saltstack concept, formatted typically in YAML, that can be used to parameterize states via templating. When editing these files, please be very careful to respect YAML syntax, especially whitespace. Security Onion is a free and open source platform for threat hunting, network security monitoring, and log management. Where is it that you cannot view them? If you right click on the, You can learn more about snort and writing snort signatures from the. > > > > > > > > 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. You can add Wazuh HIDS rules in /opt/so/rules/hids/local_rules.xml. See above for suppress examples. Security Onion Layers Ubuntu based OS Snort, Suricata Snorby Bro Sguil Squert 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. 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 Our documentation has moved to https://securityonion.net/docs/. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. If you built the rule correctly, then snort should be back up and running. 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. 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). Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. 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 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. Manager of Support and Professional Services. /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. Default YARA rules are provided from Florian Roths signature-base Github repo at https://github.com/Neo23x0/signature-base. . This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. 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? In order to apply the threshold to all nodes, place the pillar in /opt/so/saltstack/local/pillar/global.sls. Once logs are generated by network sniffing processes or endpoints, where do they go? (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. > > => I do not know how to do your guilde line. For a quick primer on flowbits, see https://blog.snort.org/2011/05/resolving-flowbit-dependancies.html. For example, suppose that we want to modify SID 2100498 and replace any instances of returned root with returned root test. You may want to bump the SID into the 90,000,000 range and set the revision to 1. This first sub-section will discuss network firewalls outside of Security Onion. Assuming you have Internet access, Security Onion will automatically update your NIDS rules on a daily basis. 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. On Thursday, June 15, 2017 at 5:06:51 PM UTC+5:30, Wes wrote: Is it simply not triggering, or causing an error? Beta Before You Begin. The error can be ignored as it is not an indication of any issue with the minions. Copyright 2023 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. 3. As shown above, we edit the minion pillar and add the SID to the idstools - sids - disabled section. 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 Our appliances will save you and your team time and resources, allowing you to focus on keeping your organization secure. This section will cover both network firewalls outside of Security Onion and the host-based firewall built into Security Onion. You should only run the rules necessary for your environment, so you may want to disable entire categories of rules that dont apply to you. 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 { I went ahead and put in the below rules under /etc/nsm/local.rules and ran the rule-update command. 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. 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). 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. Escalate local privileges to root level. Please note that Suricata 6 has a 64-character limitation on the IP field in a threshold. If you want to apply the threshold to a single node, place the pillar in /opt/so/saltstack/local/pillar/minions/.sls. Inside of /opt/so/saltstack/local/salt/strelka/rules/localrules, add your YARA rules. Have you tried something like this, in case you are not getting traffic to $HOME_NET? . The default allow rules for each node are defined by its role (manager, searchnode, sensor, heavynode, etc) in the grid. 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 Default pillar file: This is the pillar file located under /opt/so/saltstack/default/pillar/. The signature id (SID) must be unique. 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. https://docs.securityonion.net/en/2.3/local-rules.html?#id1. To get the best performance out of Security Onion, youll want to tune it for your environment. Modifying these values outside of so-allow or so-firewall could lead to problems accessing your existing hosts. Salt is a core component of Security Onion 2 as it manages all processes on all nodes. (Alternatively, you can press Ctrl+Alt+T to open a new shell.) Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. 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. Backing up current local_rules.xml file. 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. 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.