Minion pillar file: This is the minion specific pillar file that contains pillar definitions for that node. This first sub-section will discuss network firewalls outside of Security Onion. Let's add a simple rule that will alert on the detection of a string in a tcp session. Inside of /opt/so/saltstack/local/salt/strelka/rules/localrules, add your YARA rules. We offer both training and support for Security Onion. Copyright 2023 If . That's what we'll discuss in this section. Then tune your IDS rulesets. Add the following to the minions sls file located at. Adding Your Own Rules . Revision 39f7be52. 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 Security Onion. . PFA local.rules. Please review the Salt section to understand pillars and templates. 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. You signed in with another tab or window. I have 3 simple use cases (1) Detect FTP Connection to our public server 129.x.x.x (2) Detect SSH Connection attempts (3) Detect NMAP scan. 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. Once logs are generated by network sniffing processes or endpoints, where do they go? The remainder of this section will cover the host firewall built into Security Onion. Within 15 minutes, Salt should then copy those rules into /opt/so/rules/nids/local.rules. 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. Cannot retrieve contributors at this time. 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. This error now occurs in the log due to a change in the exception handling within Salts event module. You signed in with another tab or window. Now that we have a signature that will generate alerts a little more selectively, we need to disable the original signature. This section will cover both network firewalls outside of Security Onion and the host-based firewall built into Security Onion. lawson cedars. Find Age Regression Discord servers and make new friends! 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. Adding local rules in Security Onion is a rather straightforward process. You can learn more about snort and writing snort signatures from the Snort Manual. If you want to apply the threshold to a single node, place the pillar in /opt/so/saltstack/local/pillar/minions/.sls. The county seat is in Evansville. Then tune your IDS rulesets. Before You Begin. Add the following to the sensor minion pillar file located at. Reboot into your new Security Onion installation and login using the username/password you specified in the previous step. Can anyone tell me > > > > what I've done wrong please? 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. In Security Onion, locally created rules are stored in /opt/so/rules/nids/local.rules. 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. One thing you can do with it (and the one that most people are interested in) is to configure it for IDS mode. 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. If you would like to create a rule yourself and use it with Suricata, this guide might be helpful. 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. 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). For example, suppose that we want to modify SID 2100498 and replace any instances of returned root with returned root test. /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. Do you see these alerts in Squert or ELSA? Local pillar file: This is the pillar file under /opt/so/saltstack/local/pillar/. If you pivot from that alert to the corresponding pcap you can verify the payload we sent. 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. We've been teaching Security Onion classes and providing Professional Services since 2014. /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. 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). The second only needs the $ character escaped to prevent bash from treating that as a variable. 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. How are they stored? After viewing your redacted sostat it seems that the ICMP and UDP rules are triggering: Are you using SO with in a VM? Edit the /opt/so/rules/nids/local.rules file using vi or your favorite text editor: sudo vi /opt/so/rules/nids/local.rules Paste the rule. 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. Hi @Trash-P4nda , I've just updated the documentation to be clearer. 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. I went ahead and put in the below rules under /etc/nsm/local.rules and ran the rule-update command. Port groups are a way of grouping together ports similar to a firewall port/service alias. Revision 39f7be52. . 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). In 2008, Doug Burks started working on Security Onion, a Linux distribution for intrusion detection, network security monitoring, and log management. The territories controlled by the ROC consist of 168 islands, with a combined area of 36,193 square . Download Security Onion 20110116. Here are some of the items that can be customized with pillar settings: Currently, the salt-minion service startup is delayed by 30 seconds. Diagnostic logs can be found in /opt/so/log/salt/. This wiki is no longer maintained. You can see that we have an alert with the IP addresses we specified and the TCP ports we specified. Set anywhere from 5 to 12 in the local_rules Kevin. 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. Edit the /opt/so/rules/nids/local.rules file using vi or your favorite text editor: Paste the rule. 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 Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. Firewall Requirements Salt minions must be able to connect to the manager node on ports 4505/tcp and 4506/tcp: If you are on a large network, you may need to do additional tuning like pinning processes to CPU cores. If so, then tune the number of AF-PACKET workers for sniffing processes. Copyright 2023 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. 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. This repository has been archived by the owner on Apr 16, 2021. 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 . 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)
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