Custom rules can be added to the local.rules file Rule threshold entries can . Files here should not be modified as changes would be lost during a code update. . Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. 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 /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. 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 Backing up current downloaded.rules file before it gets overwritten. Tracking. 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. Salt can be used for data-driven orchestration, remote execution for any infrastructure, configuration management for any app stack, and much more. /opt/so/saltstack/local/salt/firewall/portgroups.local.yaml defines custom port groups. Within 15 minutes, Salt should then copy those rules into /opt/so/rules/nids/local.rules. It incorporates NetworkMiner, CyberChef, Squert, Sguil, Wazuh, Bro, Suricata, Snort, Kibana, Logstash, Elasticsearch, and numerous other security onion tools. Pillars are a Saltstack concept, formatted typically in YAML, that can be used to parameterize states via templating. To unsubscribe from this group and stop receiving emails from it, send an email to security-onio.@googlegroups.com. Was this translation helpful? Open /etc/nsm/rules/local.rules using your favorite text editor. These are the files that will need to be changed in order to customize nodes. This first sub-section will discuss network firewalls outside of Security Onion. Run so-rule without any options to see the help output: We can use so-rule to modify an existing NIDS rule. We offer both training and support for Security Onion. 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 These non-manager nodes are referred to as salt minions. For example, suppose we want to disable SID 2100498. Security Onion generates a lot of valuable information for you the second you plug it into a TAP or SPAN port. If you want to apply the threshold to a single node, place the pillar in /opt/so/saltstack/local/pillar/minions/.sls. For a quick primer on flowbits, see https://blog.snort.org/2011/05/resolving-flowbit-dependancies.html. It is located at /opt/so/saltstack/local/pillar/global.sls. Local pillar file: This is the pillar file under /opt/so/saltstack/local/pillar/. . 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). In the configuration window, select the relevant form of Syslog - here, it's Syslog JSON - and click. 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. To unsubscribe from this group and stop receiving emails from it, send an email to. One thing you can do with it (and the one that most people are interested in) is to configure it for IDS mode. Modifying these values outside of so-allow or so-firewall could lead to problems accessing your existing hosts. If you right click on the, You can learn more about snort and writing snort signatures from the. 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,. Our products include both the Security Onion software and specialized hardware appliances that are built and tested to run Security Onion. /opt/so/saltstack/default/salt/firewall/portgroups.yaml is where the default port groups are defined. 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. https://securityonion.net/docs/AddingLocalRules. Salt sls files are in YAML format. After select all interfaces also ICMP logs not showing in sguil. In a distributed deployment, the manager node controls all other nodes via salt. 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. You can learn more about snort and writing snort signatures from the Snort Manual. Once logs are generated by network sniffing processes or endpoints, where do they go? To configure syslog for Security Onion: Stop the Security Onion service. Beta Backing up current local_rules.xml file. To add local YARA rules, create a directory in /opt/so/saltstack/local/salt/strelka/rules, for example localrules. Please note that Suricata 6 has a 64-character limitation on the IP field in a threshold. 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. The signature id (SID) must be unique. Now that we have a signature that will generate alerts a little more selectively, we need to disable the original signature. However, generating custom traffic to test the alert can sometimes be a challenge. Cannot retrieve contributors at this time. (Alternatively, you can press Ctrl+Alt+T to open a new shell.) All the following will need to be run from the manager. MISP Rules. You may want to bump the SID into the 90,000,000 range and set the revision to 1. As shown above, we edit the minion pillar and add the SID to the idstools - sids - disabled section. 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. /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 need to increase this delay, it can be done using the salt:minion:service_start_delay pillar. 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 and dont forget that the end is a semicolon and not a colon. This way, you still have the basic ruleset, but the situations in which they fire are altered. If you pivot from that alert to the corresponding pcap you can verify the payload we sent. . Security Onion a free and open platform for intrusion detection, enterprise security monitoring, and log management. 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. Run rule-update (this will merge local.rules into downloaded.rules, update. > > => I do not know how to do your guilde line. Please review the Salt section to understand pillars and templates. Security Onion has Snort built in and therefore runs in the same instance. . Edit the /opt/so/rules/nids/local.rules file using vi or your favorite text editor: Paste the rule. 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. Long-term you should only run the rules necessary for > your environment. Give feedback. Generate some traffic to trigger the alert. Saltstack states are used to ensure the state of objects on a minion. 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. You need to configure Security Onion to send syslog so that InsightIDR can ingest it. Copyright 2023 Please keep this value below 90 seconds otherwise systemd will reach timeout and terminate the service. If . According to NIST, which step in the digital forensics process involves drawing conclusions from data? /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. If you would like to pull in NIDS rules from a MISP instance, please see: Please update your bookmarks. 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. All alerts are viewable in Alerts, Dashboards, Hunt, and Kibana. We've been teaching Security Onion classes and providing Professional Services since 2014. For more information, please see https://docs.saltproject.io/en/latest/topics/troubleshooting/yaml_idiosyncrasies.html. This will add the host group to, Add the desired IPs to the host group. I've just updated the documentation to be clearer. To get the best performance out of Security Onion, youll want to tune it for your environment. 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. 3. For example, if you include a bad custom snort rule with incorrect syntax, the snort engine will fail . Firewall Requirements Salt minions must be able to connect to the manager node on ports 4505/tcp and 4506/tcp: > To unsubscribe from this topic . These policy types can be found in /etc/nsm/rules/downloaded.rules. 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. Security Onion is a free and open platform for threat hunting, enterprise security monitoring, and log management. Copyright 2023 However, generating custom traffic to test the alert can sometimes be a challenge. Between Zeek logs, alert data from Suricata, and full packet capture from Stenographer, you have enough information to begin identifying areas of interest and making positive changes to your security stance. Do you see these alerts in Squert or ELSA? There are two directories that contain the yaml files for the firewall configuration. Within 15 minutes, Salt should then copy those rules into /opt/so/rules/nids/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 This directory stores the firewall rules specific to your grid. That's what we'll discuss in this section. After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. The second only needs the $ character escaped to prevent bash from treating that as a variable. The default allow rules for each node are defined by its role (manager, searchnode, sensor, heavynode, etc) in the grid. Download Security Onion 20110116. For example, consider the following rules that reference the ET.MSSQL flowbit. 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. When I run sostat. Please provide the output of sostat-redacted, attaching as a plain text file, or by using a service like Pastebin.com. Any definitions made here will override anything defined in other pillar files, including global. Security Onion uses idstools to download new signatures every night and process them against a set list of user generated configurations. =========================================================================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=========================================================================. . Start by creating Berkeley Packet Filters (BPFs) to ignore any traffic that you don't want your network sensors to process. 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. 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. Start by creating Berkeley Packet Filters (BPFs) to ignore any traffic that you dont want your network sensors to process. 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. The territories controlled by the ROC consist of 168 islands, with a combined area of 36,193 square . If you would like to pull in NIDS rules from a MISP instance, please see the MISP Rules section. 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. /opt/so/saltstack/default/salt/firewall/hostgroups.yaml is where the default hostgroups are defined. 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. Identification. 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. Started by Doug Burks, and first released in 2009, Security Onion has. 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. 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. In this step we are redefining the nginx port group, so be sure to include the default ports as well if you want to keep them: Associate this port group redefinition to a node. In Security Onion, locally created rules are stored in /opt/so/rules/nids/local.rules. The county seat is in Evansville. 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. so-rule allows you to disable, enable, or modify NIDS 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. Copyright 2023 This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. to security-onion When I run 'rule-update' it give an error that there are no rules in /usr/local/lib/snort_dynamicrules. You can read more about this at https://redmine.openinfosecfoundation.org/issues/4377. You could try testing a rule . 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. 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). Logs . 41 - Network Segmentation, VLANs, and Subnets. Another consideration is whether or not the traffic is being generated by a misconfigured piece of equipment. Ingest. Apply the firewall state to the node, or wait for the highstate to run for the changes to happen automatically. Salt is a core component of Security Onion 2 as it manages all processes on all nodes. Answered by weslambert on Dec 15, 2021. 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. (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. When you run so-allow or so-firewall, it modifies this file to include the IP provided in the proper hostgroup. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. Security Onion includes best-of-breed free and open tools including Suricata, Zeek, Wazuh, the Elastic Stack and many others. Finally, from the manager, update the config on the remote node: You can manage threshold entries for Suricata using Salt pillars. The error can be ignored as it is not an indication of any issue with the minions. 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. Adding Your Own Rules . The server is also responsible for ruleset management. 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. 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. In Security Onion, locally created rules are stored in /opt/so/rules/nids/local.rules. Escalate local privileges to root level. If there are a large number of uncategorized events in the securityonion_db database, sguil can have a hard time of managing the vast amount of data it needs to process to present a comprehensive overview of the alerts. A tag already exists with the provided branch name. At those times, it can be useful to query the database from the commandline. Any line beginning with "#" can be ignored as it is a comment. 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
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