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Salt Security Onion 2.3 documentation 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 Edit the /opt/so/rules/nids/local.rules file using vi or your favorite text editor: Paste the rule. Backing up current downloaded.rules file before it gets overwritten. Open /etc/nsm/rules/local.rules using your favorite text editor. If you were to add a search node, you would see its IP appear in both the minion and the search_node host groups. How are they parsed? 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) If you would like to create a rule yourself and use it with Suricata, this guide might be helpful. Security Onion Layers Ubuntu based OS Snort, Suricata Snorby Bro Sguil Squert If you built the rule correctly, then snort should be back up and running. /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. To get the best performance out of Security Onion, youll want to tune it for your environment. 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. Security Onion Set Up Part 3: Configuration of Version 14.04 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. . 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. 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. Start creating a file for your rule. 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. Though each engine uses its own severity level system, Security Onion converts that to a standardized alert severity: event.severity: 4 ==> event.severity_label: critical, event.severity: 3 ==> event.severity_label: high, event.severity: 2 ==> event.severity_label: medium, event.severity: 1 ==> event.severity_label: low. Finally, from the manager, update the config on the remote node: You can manage threshold entries for Suricata using Salt pillars. The county seat is in Evansville. While Vanderburgh County was the Default pillar file: This is the pillar file located under /opt/so/saltstack/default/pillar/. Inside of /opt/so/saltstack/local/salt/strelka/rules/localrules, add your YARA rules. Rules Security-Onion-Solutions/security-onion Wiki GitHub Boot the ISO and run through the installer. Minion pillar file: This is the minion specific pillar file that contains pillar definitions for that node. For a quick primer on flowbits, see https://blog.snort.org/2011/05/resolving-flowbit-dependancies.html. Here are some of the items that can be customized with pillar settings: Currently, the salt-minion service startup is delayed by 30 seconds. Introduction to Sguil and Squert: Part 1 - Security Onion Zero Dollar Detection and Response Orchestration with n8n, Security Copyright 2023 . Within 15 minutes, Salt should then copy those rules into /opt/so/rules/nids/local.rules. As shown above, we edit the minion pillar and add the SID to the idstools - sids - disabled section. 2. Nodes will be configured to pull from repocache.securityonion.net but this URL does not actually exist on the Internet, it is just a special address for the manager proxy. MISP Rules. 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. Identification. https://securityonion.net/docs/AddingLocalRules. Salt sls files are in YAML format. (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. However, generating custom traffic to test the alert can sometimes be a challenge. Another consideration is whether or not the traffic is being generated by a misconfigured piece of equipment. Naming convention: The collection of server processes has a server name separate from the hostname of the box. /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. For more information, please see https://docs.saltproject.io/en/latest/topics/troubleshooting/yaml_idiosyncrasies.html. Logs . Age Regression SuppliesWelcome Welcome to Gabby's Little Store! This is However, the exception is now logged. Where is it that you cannot view them? /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. > > > > > > > > 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 it is, then the most expedient measure may be to resolve the misconfiguration and then reinvestigate tuning. 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. When I run sostat. 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 . You may want to bump the SID into the 90,000,000 range and set the revision to 1. Integrating Snort 3.0 (SnortSP) and Sguil in 3 Steps - Security Onion After viewing your redacted sostat it seems that the ICMP and UDP rules are triggering: Are you using SO with in a VM? 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). Some node types get their IP assigned to multiple host groups. Revision 39f7be52. When editing these files, please be very careful to respect YAML syntax, especially whitespace. When editing these files, please be very careful to respect YAML syntax, especially whitespace. Security Onion includes best-of-breed free and open tools including Suricata, Zeek, Wazuh, the Elastic Stack and many others. The second only needs the $ character escaped to prevent bash from treating that as a variable. 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. =========================================================================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=========================================================================. 1. We've been teaching Security Onion classes and providing Professional Services since 2014. And when I check, there are no rules there. It . Tuning Security Onion 2.3 documentation Security Onion Solutions You can see that we have an alert with the IP addresses we specified and the TCP ports we specified. You can learn more about snort and writing snort signatures from the Snort Manual. Long-term you should only run the rules necessary for > your environment. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. From the Command Line. 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). It is located at /opt/so/saltstack/local/pillar/global.sls. to security-onion When I run 'rule-update' it give an error that there are no rules in /usr/local/lib/snort_dynamicrules. Security Onion not detecting traffic - groups.google.com Logs. Then tune your IDS rulesets. If this is a distributed deployment, edit local.rules on your master server and it will replicate to your sensors. A. idstools may seem like it is ignoring your disabled rules request if you try to disable a rule that has flowbits set. In a distributed deployment, the manager node controls all other nodes via salt. 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

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