This error now occurs in the log due to a change in the exception handling within Salts event module. How to create and monitor your Snort's rules in Security Onion? Also ensure you run rule-update on the machine. Basic snort rules syntax and usage [updated 2021] | Infosec Resources Write your rule, see Rules Format and save it. 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. Was this translation helpful? In many of the use cases below, we are providing the ability to modify a configuration file by editing either the global or minion pillar file. More information on each of these topics can be found in this section. A Campus Card is your University of Reading student/staff/associate 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. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. Any definitions made here will override anything defined in other pillar files, including global. OSSEC custom rules not generating alerts - Google Groups Adding Local Rules Security Onion 2.3 documentation Security Onion generates a lot of valuable information for you the second you plug it into a TAP or SPAN port. For more information, please see https://docs.saltproject.io/en/latest/topics/troubleshooting/yaml_idiosyncrasies.html. 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. 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. As you can see I have the Security Onion machine connected within the internal network to a hub. Beta 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. It is now read-only. The error can be ignored as it is not an indication of any issue with the minions. Copyright 2023 You signed in with another tab or window. Then tune your IDS rulesets. > > > > > > > > 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. 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. We've been teaching Security Onion classes and providing Professional Services since 2014. https://docs.securityonion.net/en/2.3/local-rules.html?#id1. /opt/so/saltstack/local/pillar/minions/, https://www.proofpoint.com/us/threat-insight/et-pro-ruleset, https://www.snort.org/downloads/#rule-downloads, https://www.snort.org/faq/what-are-community-rules, https://snort.org/documents/registered-vs-subscriber, license fee per sensor (users are responsible for purchasing enough licenses for their entire deployment), Snort SO (Shared Object) rules only work with Snort not, same rules as Snort Subscriber ruleset, except rules only retrievable after 30 days past release, not officially managed/supported by Security Onion. For more information about Salt, please see https://docs.saltstack.com/en/latest/. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. If this is a distributed deployment, edit local.rules on your master server and it will replicate to your sensors. Finally, from the manager, update the config on the remote node: You can manage threshold entries for Suricata using Salt pillars. If you pivot from that alert to the corresponding pcap you can verify the payload we sent. 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. Assuming you have Internet access, Security Onion will automatically update your NIDS rules on a daily basis. Revision 39f7be52. 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. 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. 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: security-onion+unsubscribe@googlegroups.com, https://groups.google.com/group/security-onion. You can learn more about snort and writing snort signatures from the Snort Manual. Enter the following sample in a line at a time. Custom local.rules not showing up in kibana NIDS page #1712 - GitHub If so, then tune the number of AF-PACKET workers for sniffing processes. For some alerts, your understanding of your own network and the business being transacted across it will be the deciding factor. 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. Security Onion Set Up Part 3: Configuration of Version 14.04 2. No rules in /usr/local/lib/snort_dynamicrules - Google Groups 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. 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. 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. To add local YARA rules, create a directory in /opt/so/saltstack/local/salt/strelka/rules, for example localrules. 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. Local YARA rules Discussion #6556 Security-Onion - GitHub These non-manager nodes are referred to as salt minions. I've just updated the documentation to be clearer. 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. If it is, then the most expedient measure may be to resolve the misconfiguration and then reinvestigate tuning. 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. However, generating custom traffic to test the alert can sometimes be a challenge. 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). Port groups are a way of grouping together ports similar to a firewall port/service alias. Revision 39f7be52. In the image below, we can see how we define some rules for an eval node. This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. Firewall Requirements Salt minions must be able to connect to the manager node on ports 4505/tcp and 4506/tcp: Here are some of the items that can be customized with pillar settings: Currently, the salt-minion service startup is delayed by 30 seconds. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Tuning NIDS Rules in Security Onion - YouTube 0:00 / 15:12 Tuning NIDS Rules in Security Onion 1,511 views Jan 10, 2022 This video shows you how to tune Suricata NIDS rules in. After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. For a quick primer on flowbits, see https://blog.snort.org/2011/05/resolving-flowbit-dependancies.html. 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. From the Command Line. Diagnostic logs can be found in /opt/so/log/salt/. 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. the rule is missing a little syntax, maybe try: alert icmp any any -> $HOME_NET any (msg:"ICMP Testing"; sid:1000001; rev:1;). Default pillar file: This is the pillar file located under /opt/so/saltstack/default/pillar/. Full Name. Previously, in the case of an exception, the code would just pass. Copyright 2023 Saltstack states are used to ensure the state of objects on a minion. "; 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). Copyright 2023 Security Onion: June 2013 If you would like to create a rule yourself and use it with Suricata, this guide might be helpful. 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. This section will cover both network firewalls outside of Security Onion and the host-based firewall built into Security Onion. 5. For example, suppose we want to disable SID 2100498. If you are on a large network, you may need to do additional tuning like pinning processes to CPU cores. Salt is a core component of Security Onion 2 as it manages all processes on all nodes. Manager of Support and Professional Services. Security Onion a free and open platform for intrusion detection, enterprise security monitoring, and log management. All alerts are viewable in Alerts, Dashboards, Hunt, and Kibana. Local pillar file: This is the pillar file under /opt/so/saltstack/local/pillar/. Identification. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. 3. 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. . Security Onion is a intrusion detection and network monitoring tool. Logs. 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 ->. For a Security Onion client, you should dedicate at least 2GB RAM, but ideally 4GB if possible. 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. Ingest. However, generating custom traffic to test the alert can sometimes be a challenge. Download Security Onion 20110116. Please keep this value below 90 seconds otherwise systemd will reach timeout and terminate the service. 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. 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). 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. IPS Policy 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. ELSA? You can read more about this at https://redmine.openinfosecfoundation.org/issues/4377. Answered by weslambert on Dec 15, 2021. To verify the Snort version, type in snort -Vand hit Enter. Security Onion Solutions If you would like to pull in NIDS rules from a MISP instance, please see: When configuring network firewalls for distributed deployments, youll want to ensure that nodes can connect as shown below. Our appliances will save you and your team time and resources, allowing you to focus on keeping your organization secure. And when I check, there are no rules there. 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. If you were to add a search node, you would see its IP appear in both the minion and the search_node host groups. 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. Tuning NIDS Rules in Security Onion - YouTube Reboot into your new Security Onion installation and login using the username/password you specified in the previous step. Custom rules can be added to the local.rules file Rule threshold entries can . 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 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. Tuning Security Onion 2.3 documentation sigs.securityonion.net (Signature files for Security Onion containers) ghcr.io (Container downloads) rules.emergingthreatspro.com (Emerging Threats IDS rules) rules.emergingthreats.net (Emerging Threats IDS open rules) www.snort.org (Paid Snort Talos ruleset) github.com (Strelka and Sigma rules updates) 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. It incorporates NetworkMiner, CyberChef, Squert, Sguil, Wazuh, Bro, Suricata, Snort, Kibana, Logstash, Elasticsearch, and numerous other security onion tools. 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. local.rules not working This will add the host group to, Add the desired IPs to the host group. Security Onion is a platform that allows you to monitor your network for security alerts. Any pointers would be appreciated. 'Re: [security-onion] Rule still triggering even after modifying to When you run so-allow or so-firewall, it modifies this file to include the IP provided in the proper hostgroup. Security Onion: A Linux Distro For IDS, NSM, And Log Management | Unixmen You need to configure Security Onion to send syslog so that InsightIDR can ingest it. If you built the rule correctly, then snort should be back up and running. to security-onion When I run 'rule-update' it give an error that there are no rules in /usr/local/lib/snort_dynamicrules. /opt/so/saltstack/default/salt/firewall/portgroups.yaml is where the default port groups are defined. Please update your bookmarks. 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. Run so-rule without any options to see the help output: We can use so-rule to modify an existing NIDS rule. 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. Find Age Regression Discord servers and make new friends! Let's add a simple rule that will alert on the detection of a string in a tcp session. By default, only the analyst hostgroup is allowed access to the nginx ports. To get the best performance out of Security Onion, youll want to tune it for your environment. 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. After viewing your redacted sostat it seems that the ICMP and UDP rules are triggering: Are you using SO with in a VM? Convert PSI to MPA | Chapel Steel Convert psi to - francescolangella.it 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. 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. 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. (Archived 1/22) Tuning NIDS Rules in Security Onion - YouTube This repository has been archived by the owner on Apr 16, 2021. Taiwan - Wikipedia Open /etc/nsm/rules/local.rules using your favorite text editor. Security Onion is a free and open source platform for threat hunting, network security monitoring, and log management. so-rule allows you to disable, enable, or modify NIDS rules. 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). If you want to apply the threshold to a single node, place the pillar in /opt/so/saltstack/local/pillar/minions/.sls. Security Onion Layers Ubuntu based OS Snort, Suricata Snorby Bro Sguil Squert I went ahead and put in the below rules under /etc/nsm/local.rules and ran the rule-update command. 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. Can anyone tell me > > > > what I've done wrong please? epic charting system training 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. Introduction to Sguil and Squert: Part 1 - Security Onion You may want to bump the SID into the 90,000,000 range and set the revision to 1. Security Onion: An Interesting Guide For 2021 - Jigsaw Academy Security Onion | InsightIDR Documentation - Rapid7 Check your syslog-ng configuration for the name of the local log source ("src" is used on SUSE systems). There are many ways to achieve age regression, but the three primary methods are: Botox. Security Onion includes best-of-breed free and open tools including Suricata, Zeek, Wazuh, the Elastic Stack and many others. 4. This is located at /opt/so/saltstack/local/pillar/minions/.sls. This directory contains the default firewall rules. Start by creating Berkeley Packet Filters (BPFs) to ignore any traffic that you don't want your network sensors to process. 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. 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. 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. . If you need to increase this delay, it can be done using the salt:minion:service_start_delay pillar. That's what we'll discuss in this section. If you would like to pull in NIDS rules from a MISP instance, please see the MISP Rules section. 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. It . The second only needs the $ character escaped to prevent bash from treating that as a variable. 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. Started by Doug Burks, and first released in 2009, Security Onion has. ManagingAlerts Security-Onion-Solutions/security-onion Wiki - GitHub 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. Once logs are generated by network sniffing processes or endpoints, where do they go? 7.2. Security Onion | Web3us LLC At those times, it can be useful to query the database from the commandline. Adding Your Own Rules . Open /etc/nsm/rules/local.rules using your favorite text editor. From https://docs.saltstack.com/en/latest/: Salt is a core component of Security Onion 2 as it manages all processes on all nodes. The signature id (SID) must be unique. Copyright 2023 MISP Rules. 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. Tracking. This first sub-section will discuss network firewalls outside of Security Onion. How are they parsed? You signed in with another tab or window. 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. Introduction Adding local rules in Security Onion is a rather straightforward process. Another consideration is whether or not the traffic is being generated by a misconfigured piece of equipment. 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 Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. Security Onion. . /opt/so/saltstack/local/salt/firewall/portgroups.local.yaml defines custom port groups. If . Re: [security-onion] Snort Local rules not getting alerts in ELSA / SQUERT To configure syslog for Security Onion: Stop the Security Onion service. Please provide the output of sostat-redacted, attaching as a plain text file, or by using a service like Pastebin.com. 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 How are they stored? When editing these files, please be very careful to respect YAML syntax, especially whitespace. Zero Dollar Detection and Response Orchestration with n8n, Security 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 . One thing you can do with it (and the one that most people are interested in) is to configure it for IDS mode. 7.2. Adding Your Own Rules Suricata 6.0.0 documentation - Read the Docs You can add Wazuh HIDS rules in /opt/so/rules/hids/local_rules.xml. Salt can be used for data-driven orchestration, remote execution for any infrastructure, configuration management for any app stack, and much more. Revision 39f7be52. Global pillar file: This is the pillar file that can be used to make global pillar assignments to the nodes.

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