Check out our NIDS tuning video at https://youtu.be/1jEkFIEUCuI! 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). 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. If you pivot from that alert to the corresponding pcap you can verify the payload we sent. 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 In the configuration window, select the relevant form of Syslog - here, it's Syslog JSON - and click. All alerts are viewable in Alerts, Dashboards, Hunt, and Kibana. idstools may seem like it is ignoring your disabled rules request if you try to disable a rule that has flowbits set. In Security Onion, locally created rules are stored in /opt/so/rules/nids/local.rules. Apply the firewall state to the node, or wait for the highstate to run for the changes to happen automatically. Let's add a simple rule that will alert on the detection of a string in a tcp session. 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. /opt/so/saltstack/local/salt/firewall/portgroups.local.yaml defines custom port groups. 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. However, generating custom traffic to test the alert can sometimes be a challenge. Copyright 2023 And when I check, there are no rules there. Manager of Support and Professional Services. When you purchase products and services from us, you're helping to fund development of Security Onion! You can see that we have an alert with the IP addresses we specified and the TCP ports we specified. These policy types can be found in /etc/nsm/rules/downloaded.rules. After select all interfaces also ICMP logs not showing in sguil. All the following will need to be run from the manager. You can learn more about scapy at secdev.org and itgeekchronicles.co.uk. If you need to increase this delay, it can be done using the salt:minion:service_start_delay pillar. From https://docs.saltstack.com/en/latest/: Salt is a core component of Security Onion 2 as it manages all processes on all nodes. (Alternatively, you can press Ctrl+Alt+T to open a new shell.) At those times, it can be useful to query the database from the commandline. It is located at /opt/so/saltstack/local/pillar/global.sls. By default, only the analyst hostgroup is allowed access to the nginx ports. 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 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. Boot the ISO and run through the installer. If you would like to pull in NIDS rules from a MISP instance, please see the MISP Rules section. 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. If it is, then the most expedient measure may be to resolve the misconfiguration and then reinvestigate tuning. Add the following to the sensor minion pillar file located at. The error can be ignored as it is not an indication of any issue with the minions. For example, if you dont care that users are accessing Facebook, then you can silence the policy-based signatures for Facebook access. 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. 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. These non-manager nodes are referred to as salt minions. Backing up current local_rules.xml file. This writeup contains a listing of important Security Onion files and directories. Port groups are a way of grouping together ports similar to a firewall port/service alias. so-rule allows you to disable, enable, or modify NIDS rules. That's what we'll discuss in this section. For more information, please see https://docs.saltproject.io/en/latest/topics/troubleshooting/yaml_idiosyncrasies.html. I've just updated the documentation to be clearer. Can anyone tell me > > > > what I've done wrong please? 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. You can read more about this at https://redmine.openinfosecfoundation.org/issues/4377. When you run so-allow or so-firewall, it modifies this file to include the IP provided in the proper hostgroup. Revision 39f7be52. These non-manager nodes are referred to as salt minions. Finally, run so-strelka-restart to allow Strelka to pull in the new rules. To add local YARA rules, create a directory in /opt/so/saltstack/local/salt/strelka/rules, for example localrules. 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. /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. This first sub-section will discuss network firewalls outside of Security Onion. /opt/so/saltstack/local/salt/idstools/local.rules, "GPL ATTACK_RESPONSE id check returned root 2", /opt/so/saltstack/local/salt/strelka/rules, /opt/so/saltstack/local/salt/strelka/rules/localrules, /opt/so/saltstack/local/salt/strelka/rules/, https://github.com/Neo23x0/signature-base. Next, run so-yara-update to pull down the rules. Interested in discussing how our products and services can help your organization? 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. Full Name. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. Security Onion is an open-source and free Linux distribution for log management, enterprise security monitoring, and intrusion detection. Now that we have a signature that will generate alerts a little more selectively, we need to disable the original signature. 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. Finally, from the manager, update the config on the remote node: You can manage threshold entries for Suricata using Salt pillars. 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. According to NIST, which step in the digital forensics process involves drawing conclusions from data? 1. 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. . Give feedback. 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. Revision 39f7be52. 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. 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. "; 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). From the Command Line. Security Onion is a intrusion detection and network monitoring tool. The default allow rules for each node are defined by its role (manager, searchnode, sensor, heavynode, etc) in the grid. After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. alert icmp any any -> any any (msg: "ICMP Testing"; sid:1000001; rev:1;). 2. The server is also responsible for ruleset management. > To unsubscribe from this topic . Please provide the output of sostat-redacted, attaching as a plain text file, or by using a service like Pastebin.com. In the image below, we can see how we define some rules for an eval node. 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. Tracking. Generate some traffic to trigger the alert. Copyright 2023 In Security Onion, locally created rules are stored in /opt/so/rules/nids/local.rules. lawson cedars. 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. 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). 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. Here are some of the items that can be customized with pillar settings: Currently, the salt-minion service startup is delayed by 30 seconds. 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. 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 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. 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. This is located at /opt/so/saltstack/local/pillar/minions/.sls. 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. idstools helpfully resolves all of your flowbit dependencies, and in this case, is re-enabling that rule for you on the fly. 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 As you can see I have the Security Onion machine connected within the internal network to a hub. 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. Assuming you have Internet access, Security Onion will automatically update your NIDS rules on a daily basis. In 2008, Doug Burks started working on Security Onion, a Linux distribution for intrusion detection, network security monitoring, and log management. Open /etc/nsm/rules/local.rules using your favorite text editor. Then tune your IDS rulesets. https://docs.securityonion.net/en/2.3/local-rules.html?#id1. Once logs are generated by network sniffing processes or endpoints, where do they go? /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. This directory contains the default firewall rules. For example, suppose we want to disable SID 2100498. 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. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. 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. Revision 39f7be52. Modifying these values outside of so-allow or so-firewall could lead to problems accessing your existing hosts. Identification. There isnt much in here other than anywhere, dockernet, localhost and self. Write your rule, see Rules Format and save it. 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 . 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 { If we want to allow a host or group of hosts to send syslog to a sensor, then we can do the following: In this example, we will be extending the default nginx port group to include port 8086 for a standalone node. The territories controlled by the ROC consist of 168 islands, with a combined area of 36,193 square . 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. 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. Backing up current downloaded.rules file before it gets overwritten. Then tune your IDS rulesets. Salt is a core component of Security Onion 2 as it manages all processes on all nodes. Answered by weslambert on Dec 15, 2021. This wiki is no longer maintained. You can learn more about snort and writing snort signatures from the Snort Manual. 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). in Sguil? If this is a distributed deployment, edit local.rules on your master server and it will replicate to your sensors. 7.2. In a distributed deployment, the manager node controls all other nodes via salt. Youll need to ensure the first of the two properly escapes any characters that would be interpreted by regex. 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. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. Revision 39f7be52. Edit the /opt/so/rules/nids/local.rules file using vi or your favorite text editor: Paste the rule. Tried as per your syntax, but still issue persists. 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. Any definitions made here will override anything defined in other pillar files, including global. 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 of those regular interventions is to ensure that you are tuning properly and proactively attempting to reach an acceptable level of signal to noise. 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 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. 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. 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. Salt can be used for data-driven orchestration, remote execution for any infrastructure, configuration management for any app stack, and much more. 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. The county seat is in Evansville. You can see that we have an alert with the IP addresses we specified and the TCP ports we specified. Run so-rule without any options to see the help output: We can use so-rule to modify an existing NIDS rule. Once your rules and alerts are under control, then check to see if you have packet loss. 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? If you want to apply the threshold to a single node, place the pillar in /opt/so/saltstack/local/pillar/minions/.sls. > > > > > > > > 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. Security Onion generates a lot of valuable information for you the second you plug it into a TAP or SPAN port. To configure syslog for Security Onion: Stop the Security Onion service. I went ahead and put in the below rules under /etc/nsm/local.rules and ran the rule-update command. Inside of /opt/so/saltstack/local/salt/strelka/rules/localrules, add your YARA rules. You received this message because you are subscribed to the Google Groups "security-onion" group. epic charting system training 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. All node types are added to the minion host group to allow Salt communication. 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 PFA local.rules. MISP Rules. Copyright 2023 As shown above, we edit the minion pillar and add the SID to the idstools - sids - disabled section. Security Onion. In order to apply the threshold to all nodes, place the pillar in /opt/so/saltstack/local/pillar/global.sls. 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 ->. If you built the rule correctly, then snort should be back up and running. Default YARA rules are provided from Florian Roths signature-base Github repo at https://github.com/Neo23x0/signature-base. . Generate some traffic to trigger the alert. If you want to tune Wazuh HIDS alerts, please see the Wazuh section. You may want to bump the SID into the 90,000,000 range and set the revision to 1. Start by creating Berkeley Packet Filters (BPFs) to ignore any traffic that you don't want your network sensors to process. 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. Reboot into your new Security Onion installation and login using the username/password you specified in the previous step. . A. In syslog-ng, the following configuration forwards all local logs to Security Onion. For example, suppose that we want to modify SID 2100498 and replace any instances of returned root with returned root test. Data collection Examination /opt/so/saltstack/default/salt/firewall/portgroups.yaml, /opt/so/saltstack/default/salt/firewall/hostgroups.yaml, /opt/so/saltstack/default/salt/firewall/assigned_hostgroups.map.yaml, /opt/so/saltstack/local/salt/firewall/portgroups.local.yaml, /opt/so/saltstack/local/salt/firewall/hostgroups.local.yaml, /opt/so/saltstack/local/salt/firewall/assigned_hostgroups.local.map.yaml, /opt/so/saltstack/local/pillar/minions/_.sls, Allow hosts to send syslog to a sensor node, raw.githubusercontent.com (Security Onion public key), sigs.securityonion.net (Signature files for Security Onion containers), rules.emergingthreatspro.com (Emerging Threats IDS rules), rules.emergingthreats.net (Emerging Threats IDS open rules), github.com (Strelka and Sigma rules updates), geoip.elastic.co (GeoIP updates for Elasticsearch), storage.googleapis.com (GeoIP updates for Elasticsearch), download.docker.com (Docker packages - Ubuntu only), repo.saltstack.com (Salt packages - Ubuntu only), packages.wazuh.com (Wazuh packages - Ubuntu only), 3142 (Apt-cacher-ng) (if manager proxy enabled, this is repocache.securityonion.net as mentioned above), Create a new host group that will contain the IPs of the hosts that you want to allow to connect to the sensor. It incorporates NetworkMiner, CyberChef, Squert, Sguil, Wazuh, Bro, Suricata, Snort, Kibana, Logstash, Elasticsearch, and numerous other security onion tools. /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. 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. This repository has been archived by the owner on Apr 16, 2021. Start by creating Berkeley Packet Filters (BPFs) to ignore any traffic that you dont want your network sensors to process. You can find the latest version of this page at: https://securityonion.net/docs/AddingLocalRules. For example, consider the following rules that reference the ET.MSSQL flowbit. IPS Policy Set anywhere from 5 to 12 in the local_rules Kevin. Within 15 minutes, Salt should then copy those rules into /opt/so/rules/nids/local.rules. For a quick primer on flowbits, see https://blog.snort.org/2011/05/resolving-flowbit-dependancies.html. You need to configure Security Onion to send syslog so that InsightIDR can ingest it. Revision 39f7be52. =========================================================================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=========================================================================. 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. When configuring network firewalls for distributed deployments, youll want to ensure that nodes can connect as shown below. Cleaning up local_rules.xml backup files older than 30 days. Our documentation has moved to https://securityonion.net/docs/. Previously, in the case of an exception, the code would just pass. One thing you can do with it (and the one that most people are interested in) is to configure it for IDS mode. Local pillar file: This is the pillar file under /opt/so/saltstack/local/pillar/. 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. This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. 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. Global pillar file: This is the pillar file that can be used to make global pillar assignments to the nodes. This is an advanced case and you most likely wont never need to modify these files. 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. 4. Fresh install of Security Onion 16.04.6.3 ISO to hardware: Two NICs, one facing management network, one monitoring mirrored port for test network Setup for Production Mode, pretty much all defaults, suricata create alert rules for /etc/nsm/local.rules and run rule-update Log into scapy/msf on kalibox, send a few suspicious packets Security Onion is a platform that allows you to monitor your network for security alerts. Security Onion includes best-of-breed free and open tools including Suricata, Zeek, Wazuh, the Elastic Stack and many others. the rule is missing a little syntax, maybe try: alert icmp any any -> $HOME_NET any (msg:"ICMP Testing"; sid:1000001; rev:1;).