/opt/so/saltstack/default/salt/firewall/portgroups.yaml, /opt/so/saltstack/default/salt/firewall/hostgroups.yaml, /opt/so/saltstack/default/salt/firewall/assigned_hostgroups.map.yaml, /opt/so/saltstack/local/salt/firewall/portgroups.local.yaml, /opt/so/saltstack/local/salt/firewall/hostgroups.local.yaml, /opt/so/saltstack/local/salt/firewall/assigned_hostgroups.local.map.yaml, /opt/so/saltstack/local/pillar/minions/_.sls, Allow hosts to send syslog to a sensor node, raw.githubusercontent.com (Security Onion public key), sigs.securityonion.net (Signature files for Security Onion containers), rules.emergingthreatspro.com (Emerging Threats IDS rules), rules.emergingthreats.net (Emerging Threats IDS open rules), github.com (Strelka and Sigma rules updates), geoip.elastic.co (GeoIP updates for Elasticsearch), storage.googleapis.com (GeoIP updates for Elasticsearch), download.docker.com (Docker packages - Ubuntu only), repo.saltstack.com (Salt packages - Ubuntu only), packages.wazuh.com (Wazuh packages - Ubuntu only), 3142 (Apt-cacher-ng) (if manager proxy enabled, this is repocache.securityonion.net as mentioned above), Create a new host group that will contain the IPs of the hosts that you want to allow to connect to the sensor. If you have Internet access and want to have so-yara-update pull YARA rules from a remote Github repo, copy /opt/so/saltstack/local/salt/strelka/rules/, and modify repos.txt to include the repo URL (one per line). local.rules not working 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) Please provide the output of sostat-redacted, attaching as a plain text file, or by using a service like Pastebin.com. Adding Your Own Rules . Custom local.rules not showing up in kibana NIDS page #1712 - GitHub After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. As shown above, we edit the minion pillar and add the SID to the idstools - sids - disabled section. In a distributed deployment, the manager node controls all other nodes via salt. Adding Local Rules Security Onion 2.3 documentation 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. Copyright 2023 Adding local rules in Security Onion is a rather straightforward process. When I run sostat. Enter the following sample in a line at a time. Within 15 minutes, Salt should then copy those rules into /opt/so/rules/nids/local.rules. 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. . 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 Copyright 2023 /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. How to exclude IP After enabling all default Snort Rules - Google Groups This directory contains the default firewall rules. 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. securityonion-docs/local-rules.rst at master Security-Onion-Solutions Open /etc/nsm/rules/local.rules using your favorite text editor. If this is a distributed deployment, edit local.rules on your master server and it will replicate to your sensors. Files here should not be modified as changes would be lost during a code update. 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. PFA local.rules. 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. Tuning Security Onion 2.3 documentation 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. For a quick primer on flowbits, see https://blog.snort.org/2011/05/resolving-flowbit-dependancies.html. > > > > > > > > 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. Salt is a core component of Security Onion 2 as it manages all processes on all nodes. 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. We can start by listing any rules that are currently modified: Lets first check the syntax for the add option: Now that we understand the syntax, lets add our modification: Once the command completes, we can verify that our modification has been added: Finally, we can check the modified rule in /opt/so/rules/nids/all.rules: To include an escaped $ character in the regex pattern youll need to make sure its properly escaped. 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. 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. Here, we will show you how to add the local rule and then use the python library scapy 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. 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 All alerts are viewable in Alerts, Dashboards, Hunt, and Kibana. 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. 1. Please review the Salt section to understand pillars and templates. Add the following to the sensor minion pillar file located at. After viewing your redacted sostat it seems that the ICMP and UDP rules are triggering: Are you using SO with in a VM? 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. Apply the firewall state to the node, or wait for the highstate to run for the changes to happen automatically. If you right click on the, You can learn more about snort and writing snort signatures from the. Start by creating Berkeley Packet Filters (BPFs) to ignore any traffic that you don't want your network sensors to process. 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 { Default YARA rules are provided from Florian Roths signature-base Github repo at https://github.com/Neo23x0/signature-base. (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. 2. The signature id (SID) must be unique. According to NIST, which step in the digital forensics process involves drawing conclusions from data? The county seat is in Evansville. While Vanderburgh County was the 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. 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. 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. When you run so-allow or so-firewall, it modifies this file to include the IP provided in the proper hostgroup. The error can be ignored as it is not an indication of any issue with the minions. Security Onion: A Linux Distro For IDS, NSM, And Log Management | Unixmen Let's add a simple rule that will alert on the detection of a string in a tcp session. 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. Was this translation helpful? Salt Security Onion 2.3 documentation Host groups are similar to port groups but for storing lists of hosts that will be allowed to connect to the associated port groups. Cleaning up local_rules.xml backup files older than 30 days. 7.2. Adding Your Own Rules Suricata 6.0.0 documentation - Read the Docs Some node types get their IP assigned to multiple host groups. Salt sls files are in YAML format. 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. All the following will need to be run from the manager. 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. Now that we have a signature that will generate alerts a little more selectively, we need to disable the original signature. GitHub - security-onion-solutions/security-onion/wiki The county seat is in Evansville. 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. c96 extractor. In order to apply the threshold to all nodes, place the pillar in /opt/so/saltstack/local/pillar/global.sls. Security Onion: June 2013 Tuning NIDS Rules in Security Onion - YouTube 7.2. Snort local rules not updated - Google Groups 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 . Start creating a file for your rule. This is an advanced case and you most likely wont never need to modify these files. Assuming you have Internet access, Security Onion will automatically update your NIDS rules on a daily basis. If you would like to pull in NIDS rules from a MISP instance, please see the MISP Rules section. Next, run so-yara-update to pull down the rules. 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. Within 15 minutes, Salt should then copy those rules into /opt/so/rules/nids/local.rules. If you were to add a search node, you would see its IP appear in both the minion and the search_node host groups. When editing these files, please be very careful to respect YAML syntax, especially whitespace. Give feedback. 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! Salt can be used for data-driven orchestration, remote execution for any infrastructure, configuration management for any app stack, and much more. 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 On Thursday, June 15, 2017 at 5:06:51 PM UTC+5:30, Wes wrote: Is it simply not triggering, or causing an error? Have you tried something like this, in case you are not getting traffic to $HOME_NET? 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. Managing Rules; Adding Local Rules; Managing Alerts; High Performance Tuning; Tricks and Tips. 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 ->. 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. Security Onion | InsightIDR Documentation - Rapid7 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. Another consideration is whether or not the traffic is being generated by a misconfigured piece of equipment. For example, consider the following rules that reference the ET.MSSQL flowbit. Generate some traffic to trigger the alert. 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. Revision 39f7be52. You may want to bump the SID into the 90,000,000 range and set the revision to 1. Pillars are a Saltstack concept, formatted typically in YAML, that can be used to parameterize states via templating. 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. You can see that we have an alert with the IP addresses we specified and the TCP ports we specified. Salt is a new approach to infrastructure management built on a dynamic communication bus. Revision 39f7be52. Inside of /opt/so/saltstack/local/salt/strelka/rules/localrules, add your YARA rules. 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. There are three alerting engines within Security Onion: Suricata, Wazuh and Playbook (Sigma). Firewall Requirements Salt minions must be able to connect to the manager node on ports 4505/tcp and 4506/tcp: Data collection Examination Port groups are a way of grouping together ports similar to a firewall port/service alias. 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. When you purchase products and services from us, you're helping to fund development of Security Onion! You are an adult, at least 18 years of age, you are familiar with and understand the standards and laws of your local community regarding sexually-oriented media. The second only needs the $ character escaped to prevent bash from treating that as a variable. Double-click the Setup script on the Desktop and follow the prompts to configure and start the Sguil processes. For more information, please see https://docs.saltproject.io/en/latest/topics/troubleshooting/yaml_idiosyncrasies.html. CCNA Cyber Ops (Version 1.1) - Chapter 12 Exam Answers Full Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. If you pivot from that alert to the corresponding pcap you can verify the payload we sent. 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? If it is, then the most expedient measure may be to resolve the misconfiguration and then reinvestigate tuning. However, generating custom traffic to test the alert can sometimes be a challenge. Revision 39f7be52. See above for suppress examples. 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). Custom rules can be added to the local.rules file Rule threshold entries can . No rules in /usr/local/lib/snort_dynamicrules - Google Groups 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. 'Re: [security-onion] Rule still triggering even after modifying to 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. Beta so-rule allows you to disable, enable, or modify NIDS rules. Escalate local privileges to root level. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. For example, suppose that we want to modify SID 2100498 and replace any instances of returned root with returned root test. Ingest. /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. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. How are they stored? Security Onion Documentation Security Onion 2.3 documentation Adding local rules in Security Onion is a rather straightforward process. To add local YARA rules, create a directory in /opt/so/saltstack/local/salt/strelka/rules, for example localrules. If so, then tune the number of AF-PACKET workers for sniffing processes. If you need to increase this delay, it can be done using the salt:minion:service_start_delay pillar. 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. If you want to apply the threshold to a single node, place the pillar in /opt/so/saltstack/local/pillar/minions/.sls. epic charting system training Generate some traffic to trigger the alert. 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. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. ELSA? It is located at /opt/so/saltstack/local/pillar/global.sls. Backing up current local_rules.xml file. I have had issues with Sguil when working with a snapshot and have not found a fix yet.. On Monday, June 26, 2017 at 8:28:44 PM UTC+5:30, KennyWap wrote: security-onion+unsubscribe@googlegroups.com, https://groups.google.com/group/security-onion. If you would like to create a rule yourself and use it with Suricata, this guide might be helpful. 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. In the configuration window, select the relevant form of Syslog - here, it's Syslog JSON - and click. How are they parsed? Local pillar file: This is the pillar file under /opt/so/saltstack/local/pillar/. 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 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). For example, if you dont care that users are accessing Facebook, then you can silence the policy-based signatures for Facebook access. It incorporates NetworkMiner, CyberChef, Squert, Sguil, Wazuh, Bro, Suricata, Snort, Kibana, Logstash, Elasticsearch, and numerous other security onion tools. IPS Policy Introduction Adding local rules in Security Onion is a rather straightforward process. > > => I do not know how to do your guilde line. In a distributed deployment, the manager node controls all other nodes via salt. We've been teaching Security Onion classes and providing Professional Services since 2014. 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). 3. After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. 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. In Security Onion, locally created rules are stored in /opt/so/rules/nids/local.rules. Youll need to ensure the first of the two properly escapes any characters that would be interpreted by regex. Age Regression SuppliesWelcome Welcome to Gabby's Little Store! This is 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. It . Our documentation has moved to https://securityonion.net/docs/. At those times, it can be useful to query the database from the commandline. 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). Security Onion is a free and open source platform for threat hunting, network security monitoring, and log management. 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. 2 Persons $40,550. 6 Persons $58,800. 3 Persons $45,600. 7 Persons Use one of the following examples in your console/terminal window: sudo nano local.rules sudo vim local.rules. Global pillar file: This is the pillar file that can be used to make global pillar assignments to the nodes. For a Security Onion client, you should dedicate at least 2GB RAM, but ideally 4GB if possible. Where is it that you cannot view them? In syslog-ng, the following configuration forwards all local logs to Security Onion. Entry-Level Network Traffic Analysis with Security Onion - Totem Check your syslog-ng configuration for the name of the local log source ("src" is used on SUSE systems). Cannot retrieve contributors at this time. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. 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. 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. Security Onion includes best-of-breed free and open tools including Suricata, Zeek, Wazuh, the Elastic Stack and many others. Revision 39f7be52. Security Onion is an open-source and free Linux distribution for log management, enterprise security monitoring, and intrusion detection. Security Onion | Web3us LLC 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. Full Name. To verify the Snort version, type in snort -Vand hit Enter. You can learn more about snort and writing snort signatures from the Snort Manual. 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.