security onion local rules security onion local rules

In the image below, we can see how we define some rules for an eval node. To get the best performance out of Security Onion, youll want to tune it for your environment. 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 Revision 39f7be52. Any definitions made here will override anything defined in other pillar files, including global. 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. 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 { 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. IPS Policy You can do the reverse unit conversion from MPa to psi, or enter any two units below:LED MSI Optix G242 24 inch IPS Gaming Monitor - Full HD - 144Hz Refresh Rate - 1ms Response time - Adaptive Sync for Esports (9S6-3BA41T-039) LED MSI OPTIX G272 Gaming Monitor 27" FHD IPS 144HZ 1MS Adaptive Sync (9S6-3CB51T-036) LG 27 FHD IPS 1ms 240Hz G . 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. This error now occurs in the log due to a change in the exception handling within Salts event module. You can learn more about scapy at secdev.org and itgeekchronicles.co.uk. If you are on a large network, you may need to do additional tuning like pinning processes to CPU cores. Set anywhere from 5 to 12 in the local_rules Kevin. Start creating a file for your rule. 4. In a distributed deployment, the manager node controls all other nodes via salt. Logs Security Onion 2.3 documentation Beta 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. Revision 39f7be52. Please keep this value below 90 seconds otherwise systemd will reach timeout and terminate the service. This section will cover both network firewalls outside of Security Onion and the host-based firewall built into Security Onion. However, generating custom traffic to test the alert can sometimes be a challenge. Generate some traffic to trigger the alert. Introduction Adding local rules in Security Onion is a rather straightforward process. /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 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. Security onion troubleshooting - silvestermallorca.de A Campus Card is your University of Reading student/staff/associate If you were to add a search node, you would see its IP appear in both the minion and the search_node host groups. To verify the Snort version, type in snort -Vand hit Enter. Any pointers would be appreciated. Data collection Examination The set of processes includes sguild, mysql, and optionally the Elastic stack (Elasticsearch, Logstash, Kibana) and Curator. Start by creating Berkeley Packet Filters (BPFs) to ignore any traffic that you dont want your network sensors to process. Try checking /var/log/nsm/hostname-interface/snortu-1.log for clues and please post the exact rule syntax you are attempting to use. Have you tried something like this, in case you are not getting traffic to $HOME_NET? Finally, from the manager, update the config on the remote node: You can manage threshold entries for Suricata using Salt pillars. 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 To unsubscribe from this group and stop receiving emails from it, send an email to. so-rule allows you to disable, enable, or modify NIDS rules. 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 is a intrusion detection and network monitoring tool. 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. 3. 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. The signature id (SID) must be unique. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. For example, if you dont care that users are accessing Facebook, then you can silence the policy-based signatures for Facebook access. One thing you can do with it (and the one that most people are interested in) is to configure it for IDS mode. Any line beginning with "#" can be ignored as it is a comment. All node types are added to the minion host group to allow Salt communication. This first sub-section will discuss network firewalls outside of Security Onion. There are many ways to achieve age regression, but the three primary methods are: Botox. However, generating custom traffic to test the alert can sometimes be a challenge. In the configuration window, select the relevant form of Syslog - here, it's Syslog JSON - and click. Then tune your IDS rulesets. Copyright 2023 Salt is a new approach to infrastructure management built on a dynamic communication bus. Apply the firewall state to the node, or wait for the highstate to run for the changes to happen automatically. For example, consider the following rules that reference the ET.MSSQL flowbit. If this is a distributed deployment, edit local.rules on your master server and it will replicate to your sensors. If you pivot from that alert to the corresponding pcap you can verify the payload we sent. Local pillar file: This is the pillar file under /opt/so/saltstack/local/pillar/. Within 15 minutes, Salt should then copy those rules into /opt/so/rules/nids/local.rules. Local YARA rules Discussion #6556 Security-Onion - GitHub If it is, then the most expedient measure may be to resolve the misconfiguration and then reinvestigate tuning. Revision 39f7be52. Adding Local Rules Security Onion 2.3 documentation Security Onion Set Up Part 3: Configuration of Version 14.04 . For more information, please see https://docs.saltproject.io/en/latest/topics/troubleshooting/yaml_idiosyncrasies.html. 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. If you want to apply the threshold to a single node, place the pillar in /opt/so/saltstack/local/pillar/minions/.sls. 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 Please note that Suricata 6 has a 64-character limitation on the IP field in a threshold. As you can see I have the Security Onion machine connected within the internal network to a hub. Next, run so-yara-update to pull down the rules. If we want to allow a host or group of hosts to send syslog to a sensor, then we can do the following: In this example, we will be extending the default nginx port group to include port 8086 for a standalone node. You may want to bump the SID into the 90,000,000 range and set the revision to 1. It is located at /opt/so/saltstack/local/pillar/global.sls. A. One of those regular interventions is to ensure that you are tuning properly and proactively attempting to reach an acceptable level of signal to noise. After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. 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. Logs . However, generating custom traffic to test the alert can sometimes be a challenge. 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. 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. 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). It incorporates NetworkMiner, CyberChef, Squert, Sguil, Wazuh, Bro, Suricata, Snort, Kibana, Logstash, Elasticsearch, and numerous other security onion tools. When configuring network firewalls for distributed deployments, youll want to ensure that nodes can connect as shown below. 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. If you would like to pull in NIDS rules from a MISP instance, please see: 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. You received this message because you are subscribed to the Google Groups "security-onion" group. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. I've just updated the documentation to be clearer. The county seat is in Evansville. 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. 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. (Alternatively, you can press Ctrl+Alt+T to open a new shell.) Security Onion is a free and open source platform for threat hunting, network security monitoring, and log management. You can learn more about snort and writing snort signatures from the Snort Manual. If . And when I check, there are no rules there. 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. /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. The second only needs the $ character escaped to prevent bash from treating that as a variable. > To unsubscribe from this topic . Security Onion Layers Ubuntu based OS Snort, Suricata Snorby Bro Sguil Squert 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. CCNA Cyber Ops (Version 1.1) - Chapter 12: Intrusion Data Analysis Write your rule, see Rules Format and save it. 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. 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). Security Onion is a free and open platform for threat hunting, enterprise security monitoring, and log management. 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. In order to apply the threshold to all nodes, place the pillar in /opt/so/saltstack/local/pillar/global.sls. Entry-Level Network Traffic Analysis with Security Onion - Totem and dont forget that the end is a semicolon and not a colon. 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. Also ensure you run rule-update on the machine. Salt sls files are in YAML format. After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. Security Onion uses idstools to download new signatures every night and process them against a set list of user generated configurations. 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) These non-manager nodes are referred to as salt minions. If so, then tune the number of AF-PACKET workers for sniffing processes. PFA local.rules. Here are some of the items that can be customized with pillar settings: Currently, the salt-minion service startup is delayed by 30 seconds. Give feedback. Tracking. 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. For example, the following threshold IP exceeds the 64-character limit: This results in the following error in the Suricata log: The solution is to break the ip field into multiple entries like this: A suppression rule allows you to make some finer grained decisions about certain rules without the onus of rewriting them. Copyright 2023 Revision 39f7be52. To unsubscribe from this group and stop receiving emails from it, send an email to security-onio.@googlegroups.com. Zero Dollar Detection and Response Orchestration with n8n, Security . Cleaning up local_rules.xml backup files older than 30 days. 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. =========================================================================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=========================================================================. /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. 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. Modifying these values outside of so-allow or so-firewall could lead to problems accessing your existing hosts. Security Onion is an open-source and free Linux distribution for log management, enterprise security monitoring, and intrusion detection. Salt is a core component of Security Onion 2 as it manages all processes on all nodes. On Thursday, June 15, 2017 at 5:06:51 PM UTC+5:30, Wes wrote: Is it simply not triggering, or causing an error? Rules Security-Onion-Solutions/security-onion Wiki GitHub 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. 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. This directory stores the firewall rules specific to your grid. All the following will need to be run from the manager. securityonion-docs/local-rules.rst at master Security-Onion-Solutions Generate some traffic to trigger the alert. Copyright 2023 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, 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. 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 . 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.