Once your rules and alerts are under control, then check to see if you have packet loss. In syslog-ng, the following configuration forwards all local logs to Security Onion. There isnt much in here other than anywhere, dockernet, localhost and self. The second only needs the $ character escaped to prevent bash from treating that as a variable. 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. 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 . 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). 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 section will cover both network firewalls outside of Security Onion and the host-based firewall built into Security Onion. 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. Another consideration is whether or not the traffic is being generated by a misconfigured piece of equipment. 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. Files here should not be modified as changes would be lost during a code update. When configuring network firewalls for Internet-connected deployments (non-Airgap), youll want to ensure that the deployment can connect outbound to the following: In the case of a distributed deployment, you can configure your nodes to pull everything from the manager so that only the manager requires Internet access. Interested in discussing how our products and services can help your organization? (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. lawson cedars. Please update your bookmarks. Revision 39f7be52. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Long-term you should only run the rules necessary for > your environment. After select all interfaces also ICMP logs not showing in sguil. This directory contains the default firewall rules. Tracking. 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 Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. I went ahead and put in the below rules under /etc/nsm/local.rules and ran the rule-update command. Logs. In the image below, we can see how we define some rules for an eval node. 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. Adding local rules in Security Onion is a rather straightforward process. Data collection Examination Security Onion offers the following choices for rulesets to be used by Suricata. It's simple enough to run in small environments without many issues and allows advanced users to deploy distributed systems that can be used in network enterprise type environments. 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. Let's add a simple rule that will alert on the detection of a string in a tcp session. PFA local.rules. In Security Onion, locally created rules are stored in /opt/so/rules/nids/local.rules. 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 is a free and open platform for threat hunting, enterprise security monitoring, and log management. If you want to tune Wazuh HIDS alerts, please see the Wazuh section. Full Name. 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. 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. Run so-rule without any options to see the help output: We can use so-rule to modify an existing NIDS rule. Start by creating Berkeley Packet Filters (BPFs) to ignore any traffic that you dont want your network sensors to process. If you need to increase this delay, it can be done using the salt:minion:service_start_delay pillar. 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. /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. Open /etc/nsm/rules/local.rules using your favorite text editor. You can add Wazuh HIDS rules in /opt/so/rules/hids/local_rules.xml. Durio zibethinus, native to Borneo and Sumatra, is the only species available in the international market.It has over 300 named varieties in Thailand and 100 in Malaysia, as of 1987. One thing you can do with it (and the one that most people are interested in) is to configure it for IDS mode. Security Onion is an open-source and free Linux distribution for log management, enterprise security monitoring, and intrusion detection. If you were to add a search node, you would see its IP appear in both the minion and the search_node host groups. If . To get the best performance out of Security Onion, youll want to tune it for your environment. For some alerts, your understanding of your own network and the business being transacted across it will be the deciding factor. 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. Security Onion is a intrusion detection and network monitoring tool. 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? /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. /opt/so/saltstack/local/salt/firewall/portgroups.local.yaml defines custom port groups. 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. Security Onion has Snort built in and therefore runs in the same instance. Please note! Please note that Suricata 6 has a 64-character limitation on the IP field in a threshold. 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. Its important to note that with this functionality, care should be given to the suppressions being written to make sure they do not suppress legitimate alerts. If you dont want to wait 15 minutes, you can force the sensors to update immediately by running the following command on your manager node: Security Onion offers the following choices for rulesets to be used by Suricata. Can anyone tell me > > > > what I've done wrong please? 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. 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. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. You could try testing a rule . Find Age Regression Discord servers and make new friends! Adding local rules in Security Onion is a rather straightforward process. 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. Copyright 2023 As shown above, we edit the minion pillar and add the SID to the idstools - sids - disabled section. Double-click the Setup script on the Desktop and follow the prompts to configure and start the Sguil processes. You signed in with another tab or window. You signed in with another tab or window. 2. Firewall Requirements Salt minions must be able to connect to the manager node on ports 4505/tcp and 4506/tcp: Check out our NIDS tuning video at https://youtu.be/1jEkFIEUCuI! . 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. We offer both training and support for Security Onion. Use one of the following examples in your console/terminal window: sudo nano local.rules sudo vim local.rules. If you would like to pull in NIDS rules from a MISP instance, please see: 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. Backups; Docker; DNS Anomaly Detection; Endgame; ICMP Anomaly Detection; Jupyter Notebook; Machine Learning; Adding a new disk; PCAPs for Testing; Removing a Node; Syslog Output; UTC and Time Zones; Utilities. 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 a platform that allows you to monitor your network for security alerts. Give feedback. Open /etc/nsm/rules/local.rules using your favorite text editor. so-rule allows you to disable, enable, or modify NIDS rules. To unsubscribe from this group and stop receiving emails from it, send an email to. 1. 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: [email protected], https://groups.google.com/group/security-onion. These are the files that will need to be changed in order to customize nodes. 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. This directory stores the firewall rules specific to your grid. If you cant run so-rule, you can modify the configuration manually in the manager pillar file at /opt/so/saltstack/local/pillar/minions/_.sls (where is manager, managersearch, standalone, or eval depending on the manager type that was chosen during install). idstools may seem like it is ignoring your disabled rules request if you try to disable a rule that has flowbits set. 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 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 . More information on each of these topics can be found in this section. You may want to bump the SID into the 90,000,000 range and set the revision to 1. Previously, in the case of an exception, the code would just pass. Default YARA rules are provided from Florian Roths signature-base Github repo at https://github.com/Neo23x0/signature-base. There are three alerting engines within Security Onion: Suricata, Wazuh and Playbook (Sigma). 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. The signature id (SID) must be unique. In Security Onion, locally created rules are stored in /opt/so/rules/nids/local.rules. Backing up current local_rules.xml file. If you want to apply the threshold to a single node, place the pillar in /opt/so/saltstack/local/pillar/minions/.sls. . If you would like to create a rule yourself and use it with Suricata, this guide might be helpful. Beta Security. This first sub-section will discuss network firewalls outside of Security Onion. 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. Any definitions made here will override anything defined in other pillar files, including global. For example, suppose that we want to modify SID 2100498 and replace any instances of returned root with returned root test. 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! I've just updated the documentation to be clearer. Before You Begin. Set anywhere from 5 to 12 in the local_rules Kevin. =========================================================================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=========================================================================. 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. As you can see I have the Security Onion machine connected within the internal network to a hub. Security Onion a free and open platform for intrusion detection, enterprise security monitoring, and log management. Within 15 minutes, Salt should then copy those rules into /opt/so/rules/nids/local.rules. 5. Are you sure you want to create this branch? 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. 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 ->. 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. 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. 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. 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. 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. All the following will need to be run from the manager. For example, if you dont care that users are accessing Facebook, then you can silence the policy-based signatures for Facebook access. IPS Policy If you built the rule correctly, then snort should be back up and running. Generate some traffic to trigger the alert. Apply the firewall state to the node, or wait for the highstate to run for the changes to happen automatically. 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). 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 From https://docs.saltstack.com/en/latest/: Salt is a core component of Security Onion 2 as it manages all processes on all nodes. Inside of /opt/so/saltstack/local/salt/strelka/rules/localrules, add your YARA rules. You can read more about this at https://redmine.openinfosecfoundation.org/issues/4377. This will add the host group to, Add the desired IPs to the host group. 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. Salt can be used for data-driven orchestration, remote execution for any infrastructure, configuration management for any app stack, and much more. 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. /opt/so/saltstack/default/salt/firewall/portgroups.yaml is where the default port groups are defined. /opt/so/saltstack/local/salt/firewall/hostgroups.local.yaml is where many default named hostgroups get populated with IPs that are specific to your environment. Edit the /opt/so/rules/nids/local.rules file using vi or your favorite text editor: Paste the rule. Manager of Support and Professional Services. By default, only the analyst hostgroup is allowed access to the nginx ports. 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. In a distributed deployment, the manager node controls all other nodes via salt. You can see that we have an alert with the IP addresses we specified and the TCP ports we specified. 7.2. There are two directories that contain the yaml files for the firewall configuration. Download Security Onion 20110116. In this file, the idstools section has a modify sub-section where you can add your modifications. 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 { A tag already exists with the provided branch name. However, generating custom traffic to test the alert can sometimes be a challenge. The server is also responsible for ruleset management. You signed in with another tab or window. Copyright 2023 In order to apply the threshold to all nodes, place the pillar in /opt/so/saltstack/local/pillar/global.sls. Some node types get their IP assigned to multiple host groups. Diagnostic logs can be found in /opt/so/log/salt/. ELSA? Saltstack states are used to ensure the state of objects on a minion. . All node types are added to the minion host group to allow Salt communication. Adding Local Rules Security Onion 2.3 documentation Docs Tuning Adding Local Rules Edit on GitHub Adding Local Rules NIDS You can add NIDS rules in /opt/so/saltstack/local/salt/idstools/local.rules on your manager. You can add NIDS rules in /opt/so/saltstack/local/salt/idstools/local.rules on your manager. You received this message because you are subscribed to the Google Groups "security-onion" group. Adding Your Own Rules . 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 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. 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. 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. Our appliances will save you and your team time and resources, allowing you to focus on keeping your organization secure. This way, you still have the basic ruleset, but the situations in which they fire are altered. > > > > > > > > Cheers, Andi > > > > > > > > > > -- Mit besten Gren Shane Castle > > > > -- > Mit besten Gren > Shane Castle > > -- > You received this message because you are subscribed to a topic in the > Google Groups "security-onion" group. Default pillar file: This is the pillar file located under /opt/so/saltstack/default/pillar/. > To unsubscribe from this topic . 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. When you purchase products and services from us, you're helping to fund development of Security Onion! 3. Started by Doug Burks, and first released in 2009, Security Onion has. Cleaning up local_rules.xml backup files older than 30 days. 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 sls files are in YAML format. When editing these files, please be very careful to respect YAML syntax, especially whitespace. Enter the following sample in a line at a time. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. 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. Hi @Trash-P4nda , I've just updated the documentation to be clearer. and dont forget that the end is a semicolon and not a colon. Was this translation 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. This error now occurs in the log due to a change in the exception handling within Salts event module. However, generating custom traffic to test the alert can sometimes be a challenge. Security Deposit Reliable Up to $5,000 Payments Higher rents as supported by comparable rents Higher Voucher Payment Standards (VPS) 10/1/2021 Signing Bonus 1 - Bedroom = $893 to $1,064 2 - Bedroom = $1,017 to $1,216 3 - Bedroom = $1,283 to $1,530 4 - Bedroom = $1,568 to $1,872 5 - Bedroom = $1,804 to $2,153 6 - Bedroom = $2,038 to . https://docs.securityonion.net/en/2.3/local-rules.html?#id1. Finally, from the manager, update the config on the remote node: You can manage threshold entries for Suricata using Salt pillars. This is an advanced case and you most likely wont never need to modify these files. the rule is missing a little syntax, maybe try: alert icmp any any -> $HOME_NET any (msg:"ICMP Testing"; sid:1000001; rev:1;). 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. 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. When you run so-allow or so-firewall, it modifies this file to include the IP provided in the proper hostgroup. 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 Been looking to add some custom YARA rules and have been following the docs https://docs.securityonion.net/en/2.3/local-rules.html?#id1 however I'm a little confused. The remainder of this section will cover the host firewall built into Security Onion. You can see that we have an alert with the IP addresses we specified and the TCP ports we specified. Pillars are a Saltstack concept, formatted typically in YAML, that can be used to parameterize states via templating. In a distributed deployment, the manager node controls all other nodes via salt. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. It . Copyright 2023 alert icmp any any -> any any (msg: "ICMP Testing"; sid:1000001; rev:1;). 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. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. . MISP Rules. Any pointers would be appreciated. 4. This repository has been archived by the owner on Apr 16, 2021. Adding local rules in Security Onion is a rather straightforward process. We've been teaching Security Onion classes and providing Professional Services since 2014. 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, At those times, it can be useful to query the database from the commandline. 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. To add local YARA rules, create a directory in /opt/so/saltstack/local/salt/strelka/rules, for example localrules. This writeup contains a listing of important Security Onion files and directories. 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.