Run rule-update (this will merge local.rules into downloaded.rules, update. Another consideration is whether or not the traffic is being generated by a misconfigured piece of equipment. Manager of Support and Professional Services. Some of these refer to areas where data is stored, while others point to configuration files that can be modified to change how Security Onion interacts with various tools. 4. 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. 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 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 Local pillar file: This is the pillar file under /opt/so/saltstack/local/pillar/. Revision 39f7be52. Then tune your IDS rulesets. Any pointers would be appreciated. Check out our NIDS tuning video at https://youtu.be/1jEkFIEUCuI! > To unsubscribe from this topic . Please keep this value below 90 seconds otherwise systemd will reach timeout and terminate the service. 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. Adding local rules in Security Onion is a rather straightforward process. Open /etc/nsm/rules/local.rules using your favorite text editor. Security Onion a free and open platform for intrusion detection, enterprise security monitoring, and log management. In this file, the idstools section has a modify sub-section where you can add your modifications. Start by creating Berkeley Packet Filters (BPFs) to ignore any traffic that you dont want your network sensors to process. IPS Policy 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. Please note that Suricata 6 has a 64-character limitation on the IP field in a threshold. After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. . However, generating custom traffic to test the alert can sometimes be a challenge. Revision 39f7be52. If you are on a large network, you may need to do additional tuning like pinning processes to CPU cores. If you right click on the, You can learn more about snort and writing snort signatures from the. When you run so-allow or so-firewall, it modifies this file to include the IP provided in the proper hostgroup. Are you sure you want to create this branch? For example, suppose we want to disable SID 2100498. This directory contains the default firewall rules. Where is it that you cannot view them? I've just updated the documentation to be clearer. Custom rules can be added to the local.rules file Rule threshold entries can . Backing up current local_rules.xml file. Our appliances will save you and your team time and resources, allowing you to focus on keeping your organization secure. Security Onion is a platform that allows you to monitor your network for security alerts. 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. 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. 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! 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. Reboot into your new Security Onion installation and login using the username/password you specified in the previous step. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. A tag already exists with the provided branch name. 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 { Copyright 2023 Now we have to build the association between the host group and the syslog port group and assign that to our sensor node. 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. 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. /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. Firewall Requirements Salt minions must be able to connect to the manager node on ports 4505/tcp and 4506/tcp: 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 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 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. 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 ->. 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. Salt sls files are in YAML format. Within 15 minutes, Salt should then copy those rules into /opt/so/rules/nids/local.rules. There isnt much in here other than anywhere, dockernet, localhost and self. 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. This is an advanced case and you most likely wont never need to modify these files. MISP Rules. Assuming you have Internet access, Security Onion will automatically update your NIDS rules on a daily basis. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. 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. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. To add local YARA rules, create a directory in /opt/so/saltstack/local/salt/strelka/rules, for example localrules. . 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. All the following will need to be run from the manager. Before You Begin. "; reference: url,http://holisticinfosec.blogspot.com/2011/12/choose-2011-toolsmith-tool-of-year.html; content: "toolsmith"; flow:to_server; nocase; sid:9000547; metadata:policy security-ips; rev:1). You could try testing a rule . Some node types get their IP assigned to multiple host groups. Security Onion Layers Ubuntu based OS Snort, Suricata Snorby Bro Sguil Squert 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). You can read more about this at https://redmine.openinfosecfoundation.org/issues/4377. 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. Write your rule, see Rules Format and save it. If you pivot from that alert to the corresponding pcap you can verify the payload we sent. When editing these files, please be very careful to respect YAML syntax, especially whitespace. 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 repository has been archived by the owner on Apr 16, 2021. In syslog-ng, the following configuration forwards all local logs to Security Onion. Then tune your IDS rulesets. 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. For example, consider the following rules that reference the ET.MSSQL flowbit. Security Onion. This way, you still have the basic ruleset, but the situations in which they fire are altered. Any line beginning with "#" can be ignored as it is a comment. Answered by weslambert on Dec 15, 2021. Please note! 3. 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. 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. 3. Copyright 2023 These non-manager nodes are referred to as salt minions. 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? 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. 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. However, generating custom traffic to test the alert can sometimes be a challenge. 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 As shown above, we edit the minion pillar and add the SID to the idstools - sids - disabled section. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. You need to configure Security Onion to send syslog so that InsightIDR can ingest it. Global pillar file: This is the pillar file that can be used to make global pillar assignments to the nodes. The error can be ignored as it is not an indication of any issue with the minions. epic charting system training Set anywhere from 5 to 12 in the local_rules Kevin. https://docs.securityonion.net/en/2.3/local-rules.html?#id1. We offer both training and support for Security Onion. This error now occurs in the log due to a change in the exception handling within Salts event module. 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. This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. 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. Generate some traffic to trigger the alert. 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. There are many ways to achieve age regression, but the three primary methods are: Botox. Find Age Regression Discord servers and make new friends! to security-onion yes it is set to 5, I have also played with the alert levels in the rules to see if the number was changing anything. You can learn more about scapy at secdev.org and itgeekchronicles.co.uk. The server is also responsible for ruleset management. Ingest. For more information, please see https://docs.saltproject.io/en/latest/topics/troubleshooting/yaml_idiosyncrasies.html. so-rule allows you to disable, enable, or modify NIDS rules. It . Started by Doug Burks, and first released in 2009, Security Onion has. Naming convention: The collection of server processes has a server name separate from the hostname of the box. Files here should not be modified as changes would be lost during a code update. Try checking /var/log/nsm/hostname-interface/snortu-1.log for clues and please post the exact rule syntax you are attempting to use. If you built the rule correctly, then snort should be back up and running. Adding local rules in Security Onion is a rather straightforward process. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. If you would like to pull in NIDS rules from a MISP instance, please see: Default pillar file: This is the pillar file located under /opt/so/saltstack/default/pillar/. Logs. 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. . 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,. /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. 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. You can see that we have an alert with the IP addresses we specified and the TCP ports we specified. /opt/so/saltstack/default/salt/firewall/hostgroups.yaml is where the default hostgroups are defined. A new version of our securityonion-rule-update package is now available that distributes OSSEC's local_rules.xml from master server to slave sensors by default and also allows for NIDS/HIDS rule tuning per physical sensor. You can add Wazuh HIDS rules in /opt/so/rules/hids/local_rules.xml. 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. Adding Your Own Rules . Inside of /opt/so/saltstack/local/salt/strelka/rules/localrules, add your YARA rules. A. 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: Craft the layer 2 information. Here are some of the items that can be customized with pillar settings: Currently, the salt-minion service startup is delayed by 30 seconds. Revision 39f7be52. Port groups are a way of grouping together ports similar to a firewall port/service alias.