Security Onion a free and open platform for intrusion detection, enterprise security monitoring, and log management. /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. On Thursday, June 15, 2017 at 5:06:51 PM UTC+5:30, Wes wrote: Is it simply not triggering, or causing an error? Security Onion includes best-of-breed free and open tools including Suricata, Zeek, Wazuh, the Elastic Stack and many others. For more information, please see https://docs.saltproject.io/en/latest/topics/troubleshooting/yaml_idiosyncrasies.html. When editing these files, please be very careful to respect YAML syntax, especially whitespace. Port groups are a way of grouping together ports similar to a firewall port/service alias. 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 free and open platform for threat hunting, enterprise security monitoring, and log management. 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! . If this is a distributed deployment, edit local.rules on your master server and it will replicate to your sensors. After select all interfaces also ICMP logs not showing in sguil. . To verify the Snort version, type in snort -Vand hit Enter. 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 section will cover both network firewalls outside of Security Onion and the host-based firewall built into Security Onion. However, generating custom traffic to test the alert can sometimes be a challenge. For more information about Salt, please see https://docs.saltstack.com/en/latest/. Cannot retrieve contributors at this time. From https://docs.saltstack.com/en/latest/: Salt is a core component of Security Onion 2 as it manages all processes on all nodes. Manager of Support and Professional Services. If it is, then the most expedient measure may be to resolve the misconfiguration and then reinvestigate tuning. Here are some of the items that can be customized with pillar settings: Currently, the salt-minion service startup is delayed by 30 seconds. Was this translation helpful? 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. Start creating a file for your rule. Adding local rules in Security Onion is a rather straightforward process. You signed in with another tab or window. You signed in with another tab or window. The format of the pillar file can be seen below, as well as in /opt/so/saltstack/default/pillar/thresholding/pillar.usage and /opt/so/saltstack/default/pillar/thresholding/pillar.example. Previously, in the case of an exception, the code would just pass. Some node types get their IP assigned to multiple host groups. =========================================================================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=========================================================================. 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 Solutions, LLC is the creator and maintainer of Security Onion, a free and open platform for threat hunting, network security monitoring, and log management. The territories controlled by the ROC consist of 168 islands, with a combined area of 36,193 square . Long-term you should only run the rules necessary for > your environment. For example, suppose we want to disable SID 2100498. 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. See above for suppress examples. Global pillar file: This is the pillar file that can be used to make global pillar assignments to the nodes. IPS Policy Security Onion is a intrusion detection and network monitoring tool. Run so-rule without any options to see the help output: We can use so-rule to modify an existing NIDS rule. Any pointers would be appreciated. Revision 39f7be52. Another consideration is whether or not the traffic is being generated by a misconfigured piece of equipment. /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. And when I check, there are no rules there. Write your rule, see Rules Format and save it. Security Onion is an open-source and free Linux distribution for log management, enterprise security monitoring, and intrusion detection. Salt sls files are in YAML format. Double-click the Setup script on the Desktop and follow the prompts to configure and start the Sguil processes. alert icmp any any -> any any (msg: "ICMP Testing"; sid:1000001; rev:1;). This way, you still have the basic ruleset, but the situations in which they fire are altered. 4. Saltstack states are used to ensure the state of objects on a minion. 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. This directory contains the default firewall rules. 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/default/salt/firewall/hostgroups.yaml is where the default hostgroups are defined. In the image below, we can see how we define some rules for an eval node. To unsubscribe from this group and stop receiving emails from it, send an email to security-onio.@googlegroups.com. Can anyone tell me > > > > what I've done wrong please? Revision 39f7be52. This directory stores the firewall rules specific to your grid. The files in this directory should not be modified as they could possibly be overwritten during a soup update in the event we update those files. 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. This will execute salt-call state.highstate -l info which outputs to the terminal with the log level set to info so that you can see exactly whats happening: Many of the options that are configurable in Security Onion 2 are done via pillar assignments in either the global or minion pillar files. Once your rules and alerts are under control, then check to see if you have packet loss. 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. 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. In this file, the idstools section has a modify sub-section where you can add your modifications. 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. 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. To unsubscribe from this group and stop receiving emails from it, send an email to. 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. Give feedback. c96 extractor. Tried as per your syntax, but still issue persists. These non-manager nodes are referred to as salt minions. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. 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 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. Let's add a simple rule that will alert on the detection of a string in a tcp session. 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. To configure syslog for Security Onion: Stop the Security Onion service. Files here should not be modified as changes would be lost during a code update. 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. Do you see these alerts in Squert or ELSA? Add the following to the minions sls file located at. Security Onion. Also ensure you run rule-update on the machine. The default allow rules for each node are defined by its role (manager, searchnode, sensor, heavynode, etc) in the grid. If you would like to create a rule yourself and use it with Suricata, this guide might be helpful. All the following will need to be run from the manager. Security Onion uses idstools to download new signatures every night and process them against a set list of user generated configurations. 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. There are three alerting engines within Security Onion: Suricata, Wazuh and Playbook (Sigma). 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. 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. Now that we have a signature that will generate alerts a little more selectively, we need to disable the original signature. 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. As you can see I have the Security Onion machine connected within the internal network to a hub. If you would like to pull in NIDS rules from a MISP instance, please see: 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. From the Command Line. 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). 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). MISP Rules. Copyright 2023 For example: If you need to modify a part of a rule that contains a special character, such as a $ in variable names, the special character needs to be escaped in the search part of the modify string. These are the files that will need to be changed in order to customize nodes. Security Onion is a platform that allows you to monitor your network for security alerts. This writeup contains a listing of important Security Onion files and directories. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Minion pillar file: This is the minion specific pillar file that contains pillar definitions for that node. Security Onion generates a lot of valuable information for you the second you plug it into a TAP or SPAN port. After viewing your redacted sostat it seems that the ICMP and UDP rules are triggering: Are you using SO with in a VM? Full Name. Naming convention: The collection of server processes has a server name separate from the hostname of the box. 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. 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. Started by Doug Burks, and first released in 2009, Security Onion has. You could try testing a rule . 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. /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. 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 ->. 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. 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. Revision 39f7be52. Identification. Generate some traffic to trigger the alert. 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, 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. 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. Our documentation has moved to https://securityonion.net/docs/. Finally, run so-strelka-restart to allow Strelka to pull in the new rules. Copyright 2023 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 However, generating custom traffic to test the alert can sometimes be a challenge. Firewall Requirements Salt minions must be able to connect to the manager node on ports 4505/tcp and 4506/tcp: so-rule allows you to disable, enable, or modify NIDS rules. Please provide the output of sostat-redacted, attaching as a plain text file, or by using a service like Pastebin.com. Inside of /opt/so/saltstack/local/salt/strelka/rules/localrules, add your YARA rules. Add the following to the sensor minion pillar file located at. Revision 39f7be52. > > => I do not know how to do your guilde line. Security Onion Layers Ubuntu based OS Snort, Suricata Snorby Bro Sguil Squert Pillars are a Saltstack concept, formatted typically in YAML, that can be used to parameterize states via templating. 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. You can add NIDS rules in /opt/so/saltstack/local/salt/idstools/local.rules on your manager. 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 review the Salt section to understand pillars and templates. When I run sostat. This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. You do not have permission to delete messages in this group, Either email addresses are anonymous for this group or you need the view member email addresses permission to view the original message. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. Logs. 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. 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. This is located at /opt/so/saltstack/local/pillar/minions/.sls. To get the best performance out of Security Onion, youll want to tune it for your environment. If so, then tune the number of AF-PACKET workers for sniffing processes. You can learn more about snort and writing snort signatures from the Snort Manual. lawson cedars. 3. Logs . These policy types can be found in /etc/nsm/rules/downloaded.rules. Default pillar file: This is the pillar file located under /opt/so/saltstack/default/pillar/. Security Onion has Snort built in and therefore runs in the same instance. 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. 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. idstools helpfully resolves all of your flowbit dependencies, and in this case, is re-enabling that rule for you on the fly. 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. epic charting system training 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. The signature id (SID) must be unique. 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 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.
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