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jq; so-allow; so-elastic-auth; so . You may want to bump the SID into the 90,000,000 range and set the revision to 1. 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. 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. This section will cover both network firewalls outside of Security Onion and the host-based firewall built into Security Onion. Now that we have a signature that will generate alerts a little more selectively, we need to disable the original signature. It . 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 configuring network firewalls for distributed deployments, youll want to ensure that nodes can connect as shown below. 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. If you want to tune Wazuh HIDS alerts, please see the Wazuh section. . After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. Security Onion offers the following choices for rulesets to be used by Suricata. You signed in with another tab or window. /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. You can find the latest version of this page at: https://securityonion.net/docs/AddingLocalRules. 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. Security Onion: A Linux Distro For IDS, NSM, And Log Management | Unixmen Where is it that you cannot view them? Run rule-update (this will merge local.rules into downloaded.rules, update. 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. However, generating custom traffic to test the alert can sometimes be a challenge. 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. 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, This way, you still have the basic ruleset, but the situations in which they fire are altered. You may want to bump the SID into the 90,000,000 range and set the revision to 1. Zero Dollar Detection and Response Orchestration with n8n, Security Boot the ISO and run through the installer. /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. Salt Security Onion 2.3 documentation /opt/so/saltstack/default/salt/firewall/portgroups.yaml is where the default port groups are defined. 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. 3. 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. Start creating a file for your rule. We've been teaching Security Onion classes and providing Professional Services since 2014. Security Onion generates a lot of valuable information for you the second you plug it into a TAP or SPAN port. If you dont want to wait for these automatic processes, you can run them manually from the manager (replacing $SENSORNAME_$ROLE as necessary): Lets add a simple rule to /opt/so/saltstack/local/salt/idstools/local.rules thats really just a copy of the traditional id check returned root rule: Restart Suricata (replacing $SENSORNAME_$ROLE as necessary): If you built the rule correctly, then Suricata should be back up and running. For a quick primer on flowbits, see https://blog.snort.org/2011/05/resolving-flowbit-dependancies.html. Before You Begin. 2. This is an advanced case and you most likely wont never need to modify these files. Any pointers would be appreciated. In Security Onion, locally created rules are stored in /opt/so/rules/nids/local.rules. 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. No rules in /usr/local/lib/snort_dynamicrules - Google Groups 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. 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? How are they stored? When setup is run on a new node, it will SSH to the manager using the soremote account and add itself to the appropriate host groups. Adding local rules in Security Onion is a rather straightforward process. Default YARA rules are provided from Florian Roths signature-base Github repo at https://github.com/Neo23x0/signature-base. Adding local rules in Security Onion is a rather straightforward process. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. We can start by listing any rules that are currently modified: Lets first check the syntax for the add option: Now that we understand the syntax, lets add our modification: Once the command completes, we can verify that our modification has been added: Finally, we can check the modified rule in /opt/so/rules/nids/all.rules: To include an escaped $ character in the regex pattern youll need to make sure its properly escaped. Data collection Examination IPS Policy 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. I've just updated the documentation to be clearer. Tuning NIDS Rules in Security Onion - YouTube Please update your bookmarks. If this is a distributed deployment, edit local.rules on your master server and it will replicate to your sensors. 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. Naming convention: The collection of server processes has a server name separate from the hostname of the box. 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. Security Onion is a free and open platform for threat hunting, enterprise security monitoring, and log management. Start by creating Berkeley Packet Filters (BPFs) to ignore any traffic that you dont want your network sensors to process. epic charting system training idstools helpfully resolves all of your flowbit dependencies, and in this case, is re-enabling that rule for you on the fly. Pillars are a Saltstack concept, formatted typically in YAML, that can be used to parameterize states via templating. 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. Re: [security-onion] Snort Local rules not getting alerts in ELSA / SQUERT 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. https://securityonion.net/docs/AddingLocalRules. Previously, in the case of an exception, the code would just pass. However, generating custom traffic to test the alert can sometimes be a challenge. Double-click the Setup script on the Desktop and follow the prompts to configure and start the Sguil processes. Introduction Adding local rules in Security Onion is a rather straightforward process. Copyright 2023 Generate some traffic to trigger the alert. In syslog-ng, the following configuration forwards all local logs to Security Onion. Security Onion: June 2013 Escalate local privileges to root level. /opt/so/saltstack/default/salt/firewall/hostgroups.yaml is where the default hostgroups are defined. Please provide the output of sostat-redacted, attaching as a plain text file, or by using a service like Pastebin.com. Cannot retrieve contributors at this time. When you purchase products and services from us, you're helping to fund development of Security Onion! Snort local rules not updated - Google Groups Generate some traffic to trigger the alert. Was this translation helpful? Interested in discussing how our products and services can help your organization? 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. Logs Security Onion 2.3 documentation local.rules not working Copyright 2023 Logs. In 2008, Doug Burks started working on Security Onion, a Linux distribution for intrusion detection, network security monitoring, and log management. . 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). To verify the Snort version, type in snort -Vand hit Enter. Tried as per your syntax, but still issue persists. Write your rule, see Rules Format and save it. Can anyone tell me > > > > what I've done wrong please? ManagingAlerts Security-Onion-Solutions/security-onion Wiki - GitHub All node types are added to the minion host group to allow Salt communication. However, the exception is now logged. Security onion troubleshooting - silvestermallorca.de 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. Security Onion | Web3us LLC These policy types can be found in /etc/nsm/rules/downloaded.rules. Security Onion has Snort built in and therefore runs in the same instance. Local pillar file: This is the pillar file under /opt/so/saltstack/local/pillar/. Please keep this value below 90 seconds otherwise systemd will reach timeout and terminate the service. All the following will need to be run from the manager. After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. For some alerts, your understanding of your own network and the business being transacted across it will be the deciding factor. Assuming you have Internet access, Security Onion will automatically update your NIDS rules on a daily basis. 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. Modifying these values outside of so-allow or so-firewall could lead to problems accessing your existing hosts. In a distributed deployment, the manager node controls all other nodes via salt. so-rule allows you to disable, enable, or modify NIDS rules. Security Onion Solutions 'Re: [security-onion] Rule still triggering even after modifying to In order to apply the threshold to all nodes, place the pillar in /opt/so/saltstack/local/pillar/global.sls. Syslog-ng and Security Onion Adding Your Own Rules . CCNA Cyber Ops (Version 1.1) - Chapter 12 Exam Answers Full Also ensure you run rule-update on the machine. I went ahead and put in the below rules under /etc/nsm/local.rules and ran the rule-update command. Default pillar file: This is the pillar file located under /opt/so/saltstack/default/pillar/. MISP 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. Port groups are a way of grouping together ports similar to a firewall port/service alias. "; 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). It is now read-only. If you would like to create a rule yourself and use it with Suricata, this guide might be helpful. 1. Check your syslog-ng configuration for the name of the local log source ("src" is used on SUSE systems). This will add the host group to, Add the desired IPs to the host group. 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. 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://docs.securityonion.net/en/2.3/local-rules.html?#id1. AddingLocalRules Security-Onion-Solutions/security-onion Wiki 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. If . Cleaning up local_rules.xml backup files older than 30 days. Security Onion is a free and open source platform for threat hunting, network security monitoring, and log management. FAQ Security-Onion-Solutions/security-onion Wiki GitHub Security Onion uses idstools to download new signatures every night and process them against a set list of user generated configurations. Once your rules and alerts are under control, then check to see if you have packet loss. How to exclude IP After enabling all default Snort Rules - Google Groups Copyright 2023 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. There are three alerting engines within Security Onion: Suricata, Wazuh and Playbook (Sigma). Security Onion is a intrusion detection and network monitoring tool. This directory contains the default firewall rules. You can see that we have an alert with the IP addresses we specified and the TCP ports we specified. To get the best performance out of Security Onion, youll want to tune it for your environment. 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 Rules Security-Onion-Solutions/security-onion Wiki GitHub 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. Important "Security Onion" Files and Directories - Medium 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). Inside of /opt/so/saltstack/local/salt/strelka/rules/localrules, add your YARA rules. Adding local rules in Security Onion is a rather straightforward process. For example, suppose that we want to modify SID 2100498 and replace any instances of returned root with returned root test. Taiwan - Wikipedia 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. If you right click on the, You can learn more about snort and writing snort signatures from the. 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. In the image below, we can see how we define some rules for an eval node. Have you tried something like this, in case you are not getting traffic to $HOME_NET? If you would like to pull in NIDS rules from a MISP instance, please see: Next, run so-yara-update to pull down the rules. To configure syslog for Security Onion: Stop the Security Onion service. the rule is missing a little syntax, maybe try: alert icmp any any -> $HOME_NET any (msg:"ICMP Testing"; sid:1000001; rev:1;). Backing up current local_rules.xml file. You can read more about this at https://redmine.openinfosecfoundation.org/issues/4377. More information on each of these topics can be found in this section. If you need to increase this delay, it can be done using the salt:minion:service_start_delay pillar. Security Onion is a platform that allows you to monitor your network for security alerts. We can start by listing any currently disabled rules: Once that completes, we can then verify that 2100498 is now disabled with so-rule disabled list: Finally, we can check that 2100498 is commented out in /opt/so/rules/nids/all.rules: If you cant run so-rule, then you can modify configuration manually. Another consideration is whether or not the traffic is being generated by a misconfigured piece of equipment. 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. Please note! 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. Security Onion is an open-source and free Linux distribution for log management, enterprise security monitoring, and intrusion detection. After select all interfaces also ICMP logs not showing in sguil. Some node types get their IP assigned to multiple host groups. 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. Here are some of the items that can be customized with pillar settings: Currently, the salt-minion service startup is delayed by 30 seconds. Run the following command to get a listing of categories and the number of rules in each: In tuning your sensor, you must first understand whether or not taking corrective actions on this signature will lower your overall security stance. The default allow rules for each node are defined by its role (manager, searchnode, sensor, heavynode, etc) in the grid. Managing Alerts Security Onion 2.3 documentation Entry-Level Network Traffic Analysis with Security Onion - Totem This wiki is no longer maintained. If you are on a large network, you may need to do additional tuning like pinning processes to CPU cores. Beta 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 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). After viewing your redacted sostat it seems that the ICMP and UDP rules are triggering: Are you using SO with in a VM? Revision 39f7be52. The server is also responsible for ruleset management. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. Adding Local Rules Security Onion 2.3 documentation 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: These policy types can be found in /etc/nsm/rules/downloaded.rules. 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. Security Onion Set Up Part 3: Configuration of Version 14.04 The second only needs the $ character escaped to prevent bash from treating that as a variable. How are they parsed? 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. ELSA? We offer both training and support for Security Onion. Security Onion Lab Setup with VirtualBox | Free Video Tutorial - Udemy