security onion local rules

From the Command Line. jq; so-allow; so-elastic-auth; so . Hi @Trash-P4nda , I've just updated the documentation to be clearer. 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) However, generating custom traffic to test the alert can sometimes be a challenge. 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. Full Name. Add the following to the minions sls file located at. To get the best performance out of Security Onion, youll want to tune it for your environment. Security Onion Layers Ubuntu based OS Snort, Suricata Snorby Bro Sguil Squert 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. 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. If you do not see this alert, try checking to see if the rule is enabled in /opt/so/rules/nids/all.rules: Rulesets come with a large number of rules enabled (over 20,000 by default). We've been teaching Security Onion classes and providing Professional Services since 2014. Check your syslog-ng configuration for the name of the local log source ("src" is used on SUSE systems). However, generating custom traffic to test the alert can sometimes be a challenge. "; 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). Try checking /var/log/nsm/hostname-interface/snortu-1.log for clues and please post the exact rule syntax you are attempting to use. Within 15 minutes, Salt should then copy those rules into /opt/so/rules/nids/local.rules. Security Onion Solutions, LLC is the creator and maintainer of Security Onion, a free and open platform for threat hunting, network security monitoring, and log management. On Thursday, June 15, 2017 at 5:06:51 PM UTC+5:30, Wes wrote: Is it simply not triggering, or causing an error? ELSA? . Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. 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. Revision 39f7be52. 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. 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. For more information about Salt, please see https://docs.saltstack.com/en/latest/. Where is it that you cannot view them? Copyright 2023 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. Salt can be used for data-driven orchestration, remote execution for any infrastructure, configuration management for any app stack, and much more. =========================================================================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=========================================================================. 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. You can learn more about snort and writing snort signatures from the Snort Manual. 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. Finally, run so-strelka-restart to allow Strelka to pull in the new rules. Beta In order to apply the threshold to all nodes, place the pillar in /opt/so/saltstack/local/pillar/global.sls. Run rule-update (this will merge local.rules into downloaded.rules, update. It is located at /opt/so/saltstack/local/pillar/global.sls. You signed in with another tab or window. Local pillar file: This is the pillar file under /opt/so/saltstack/local/pillar/. In this file, the idstools section has a modify sub-section where you can add your modifications. Some node types get their IP assigned to multiple host groups. You can read more about this at https://redmine.openinfosecfoundation.org/issues/4377. 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. These non-manager nodes are referred to as salt minions. You received this message because you are subscribed to the Google Groups "security-onion" group. 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 . This error now occurs in the log due to a change in the exception handling within Salts event module. Logs. 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. Run so-rule without any options to see the help output: We can use so-rule to modify an existing NIDS rule. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. We offer both training and support for Security Onion. This is located at /opt/so/saltstack/local/pillar/minions/.sls. 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. Assuming you have Internet access, Security Onion will automatically update your NIDS rules on a daily basis. Any line beginning with "#" can be ignored as it is a comment. Default pillar file: This is the pillar file located under /opt/so/saltstack/default/pillar/. The remainder of this section will cover the host firewall built into Security Onion. Any pointers would be appreciated. Then tune your IDS rulesets. Copyright 2023 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. Please note that Suricata 6 has a 64-character limitation on the IP field in a threshold. 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 Start creating a file for your rule. Check out our NIDS tuning video at https://youtu.be/1jEkFIEUCuI! 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 ->. (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. If you pivot from that alert to the corresponding pcap you can verify the payload we sent. How are they stored? This will add the host group to, Add the desired IPs to the host group. You need to configure Security Onion to send syslog so that InsightIDR can ingest it. According to NIST, which step in the digital forensics process involves drawing conclusions from data? 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. This first sub-section will discuss network firewalls outside of Security Onion. After viewing your redacted sostat it seems that the ICMP and UDP rules are triggering: Are you using SO with in a VM? Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. 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. 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. 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 Default YARA rules are provided from Florian Roths signature-base Github repo at https://github.com/Neo23x0/signature-base. Cannot retrieve contributors at this time. These are the files that will need to be changed in order to customize nodes. All alerts are viewable in Alerts, Dashboards, Hunt, and Kibana. Inside of /opt/so/saltstack/local/salt/strelka/rules/localrules, add your YARA rules. 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. 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. Our products include both the Security Onion software and specialized hardware appliances that are built and tested to run Security Onion. However, the exception is now logged. 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. 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. Within 15 minutes, Salt should then copy those rules into /opt/so/rules/nids/local.rules. 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. idstools may seem like it is ignoring your disabled rules request if you try to disable a rule that has flowbits set. Security Onion generates a lot of valuable information for you the second you plug it into a TAP or SPAN port. When editing these files, please be very careful to respect YAML syntax, especially whitespace. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. 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. Revision 39f7be52. Nodes will be configured to pull from repocache.securityonion.net but this URL does not actually exist on the Internet, it is just a special address for the manager proxy. Backing up current downloaded.rules file before it gets overwritten. However, generating custom traffic to test the alert can sometimes be a challenge. This directory contains the default firewall rules. If you would like to pull in NIDS rules from a MISP instance, please see the MISP Rules section. 5. 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 . 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. If you would like to pull in NIDS rules from a MISP instance, please see: 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). There are two directories that contain the yaml files for the firewall configuration. Backing up current local_rules.xml file. 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 . Revision 39f7be52. For example, if you include a bad custom snort rule with incorrect syntax, the snort engine will fail . https://securityonion.net/docs/AddingLocalRules. 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. 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. 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. 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. 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 These policy types can be found in /etc/nsm/rules/downloaded.rules. After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. Generate some traffic to trigger the alert. If you would like to create a rule yourself and use it with Suricata, this guide might be helpful. Security Onion is a free and open-source Linux distribution prepared for intrusion detection, security monitoring, and log management with the assistance of security tools namely Snort,. 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. 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. 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. 3. If . Started by Doug Burks, and first released in 2009, Security Onion has. 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. 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. Enter the following sample in a line at a time. 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, For example, if ips_policy was set to security, you would add the following to each rule: The whole rule would then look something like: These policy types can be found in /etc/nsm/rules/downloaded.rules. Was this translation helpful? The signature id (SID) must be unique. 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. Saltstack states are used to ensure the state of objects on a minion. IPS Policy Previously, in the case of an exception, the code would just pass. 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. You should only run the rules necessary for your environment, so you may want to disable entire categories of rules that dont apply to you. /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. the rule is missing a little syntax, maybe try: alert icmp any any -> $HOME_NET any (msg:"ICMP Testing"; sid:1000001; rev:1;). Start by creating Berkeley Packet Filters (BPFs) to ignore any traffic that you dont want your network sensors to process. Identification. Open /etc/nsm/rules/local.rules using your favorite text editor. Salt is a new approach to infrastructure management built on a dynamic communication bus. How are they parsed? This wiki is no longer maintained. Host groups are similar to port groups but for storing lists of hosts that will be allowed to connect to the associated port groups. Diagnostic logs can be found in /opt/so/log/salt/. Can anyone tell me > > > > what I've done wrong please? /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. 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. In a distributed deployment, the manager node controls all other nodes via salt. 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. Please provide the output of sostat-redacted, attaching as a plain text file, or by using a service like Pastebin.com. I've just updated the documentation to be clearer. To unsubscribe from this group and stop receiving emails from it, send an email to. lawson cedars. After select all interfaces also ICMP logs not showing in sguil. After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. As you can see I have the Security Onion machine connected within the internal network to a hub. Interested in discussing how our products and services can help your organization? Firewall Requirements Salt minions must be able to connect to the manager node on ports 4505/tcp and 4506/tcp: 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. If this is a distributed deployment, edit local.rules on your master server and it will replicate to your sensors. When you purchase products and services from us, you're helping to fund development of Security Onion! Security Onion. This repository has been archived by the owner on Apr 16, 2021. 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. Salt is a core component of Security Onion 2 as it manages all processes on all nodes. 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. 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 signed in with another tab or window. Security Onion includes best-of-breed free and open tools including Suricata, Zeek, Wazuh, the Elastic Stack and many others. Have you tried something like this, in case you are not getting traffic to $HOME_NET? 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. 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. Minion pillar file: This is the minion specific pillar file that contains pillar definitions for that node. > To unsubscribe from this topic . Edit the /opt/so/rules/nids/local.rules file using vi or your favorite text editor: Paste the rule. 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. Tried as per your syntax, but still issue persists. Next, run so-yara-update to pull down the rules. > > > > > > > > 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. Finally, from the manager, update the config on the remote node: You can manage threshold entries for Suricata using Salt pillars. All node types are added to the minion host group to allow Salt communication. 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 If so, then tune the number of AF-PACKET workers for sniffing processes. 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. 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. 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. Once logs are generated by network sniffing processes or endpoints, where do they go? And when I check, there are no rules there.