security onion local rules

Security Onion offers the following choices for rulesets to be used by Snort/Suricata: ET Open optimized for Suricata, but available for Snort as well free For more information, see: https://rules.emergingthreats.net/open/ ET Pro (Proofpoint) optimized for Suricata, but available for Snort as well rules retrievable as released These non-manager nodes are referred to as salt minions. in Sguil? In a distributed deployment, the manager node controls all other nodes via salt. 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. You signed in with another tab or window. Identification. Though each engine uses its own severity level system, Security Onion converts that to a standardized alert severity: event.severity: 4 ==> event.severity_label: critical, event.severity: 3 ==> event.severity_label: high, event.severity: 2 ==> event.severity_label: medium, event.severity: 1 ==> event.severity_label: low. Security Onion includes best-of-breed free and open tools including Suricata, Zeek, Wazuh, the Elastic Stack and many others. idstools helpfully resolves all of your flowbit dependencies, and in this case, is re-enabling that rule for you on the fly. 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. Check your syslog-ng configuration for the name of the local log source ("src" is used on SUSE systems). If you built the rule correctly, then snort should be back up and running. We've been teaching Security Onion classes and providing Professional Services since 2014. We offer both training and support for Security Onion. After select all interfaces also ICMP logs not showing in sguil. Security Onion. Before You Begin. In Security Onion, locally created rules are stored in /opt/so/rules/nids/local.rules. In order to apply the threshold to all nodes, place the pillar in /opt/so/saltstack/local/pillar/global.sls. Once your rules and alerts are under control, then check to see if you have packet loss. This repository has been archived by the owner on Apr 16, 2021. 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. Assuming you have Internet access, Security Onion will automatically update your NIDS rules on a daily basis. 7.2. 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. You may want to bump the SID into the 90,000,000 range and set the revision to 1. /opt/so/saltstack/local/salt/firewall/portgroups.local.yaml defines custom port groups. Double-click the Setup script on the Desktop and follow the prompts to configure and start the Sguil processes. When editing these files, please be very careful to respect YAML syntax, especially whitespace. Long-term you should only run the rules necessary for > your environment. Interested in discussing how our products and services can help your organization? 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. 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. If you would like to pull in NIDS rules from a MISP instance, please see the MISP Rules section. See above for suppress examples. For a Security Onion client, you should dedicate at least 2GB RAM, but ideally 4GB if possible. To verify the Snort version, type in snort -Vand hit Enter. (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. Enter the following sample in a line at a time. First off, I'll briefly explain security onion security Onion is the leading open source operating system for network security monitoring, intrusion detection, log management and threat hunting. 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 Host groups are similar to port groups but for storing lists of hosts that will be allowed to connect to the associated port groups. and dont forget that the end is a semicolon and not a colon. Default pillar file: This is the pillar file located under /opt/so/saltstack/default/pillar/. Some node types get their IP assigned to multiple host groups. Saltstack states are used to ensure the state of objects on a minion. 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. Check out our NIDS tuning video at https://youtu.be/1jEkFIEUCuI! 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. 5. In a distributed deployment, the manager node controls all other nodes via salt. 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 would like to create a rule yourself and use it with Suricata, this guide might be helpful. . There are three alerting engines within Security Onion: Suricata, Wazuh and Playbook (Sigma). Copyright 2023 lawson cedars. 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. Started by Doug Burks, and first released in 2009, Security Onion has. Our products include both the Security Onion software and specialized hardware appliances that are built and tested to run Security Onion. 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. 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. For example, if you include a bad custom snort rule with incorrect syntax, the snort engine will fail . This first sub-section will discuss network firewalls outside of Security Onion. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. 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. Security Onion is a free and open platform for threat hunting, enterprise security monitoring, and log management. However, generating custom traffic to test the alert can sometimes be a challenge. Revision 39f7be52. 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. You can read more about this at https://redmine.openinfosecfoundation.org/issues/4377. =========================================================================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=========================================================================. 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. > > => I do not know how to do your guilde line. Firewall Requirements Salt minions must be able to connect to the manager node on ports 4505/tcp and 4506/tcp: 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. Add the following to the minions sls file located at. Copyright 2023 Tried as per your syntax, but still issue persists. However, generating custom traffic to test the alert can sometimes be a challenge. However, the exception is now logged. 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. After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. There are many ways to achieve age regression, but the three primary methods are: Botox. Copyright 2023 Data collection Examination You can add NIDS rules in /opt/so/saltstack/local/salt/idstools/local.rules on your manager. Global pillar file: This is the pillar file that can be used to make global pillar assignments to the nodes. Tracking. When I run sostat. In syslog-ng, the following configuration forwards all local logs to Security Onion. Security Onion is a free and open source platform for threat hunting, network security monitoring, and log management. Port groups are a way of grouping together ports similar to a firewall port/service alias. Finally, from the manager, update the config on the remote node: You can manage threshold entries for Suricata using Salt pillars. 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 { 3. Backing up current downloaded.rules file before it gets overwritten. There are two directories that contain the yaml files for the firewall configuration. Local pillar file: This is the pillar file under /opt/so/saltstack/local/pillar/. 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. Adding local rules in Security Onion is a rather straightforward process. Ingest. Was this translation helpful? Naming convention: The collection of server processes has a server name separate from the hostname of the box. 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. Can anyone tell me > > > > what I've done wrong please? These non-manager nodes are referred to as salt minions. Default YARA rules are provided from Florian Roths signature-base Github repo at https://github.com/Neo23x0/signature-base. You received this message because you are subscribed to 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. Adding local rules in Security Onion is a rather straightforward process. You can learn more about snort and writing snort signatures from the Snort Manual. To add local YARA rules, create a directory in /opt/so/saltstack/local/salt/strelka/rules, for example localrules. 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. 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. 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. Any line beginning with "#" can be ignored as it is a comment. . /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. Adding Your Own Rules . /opt/so/saltstack/default/salt/firewall/hostgroups.yaml is where the default hostgroups are defined. Please provide the output of sostat-redacted, attaching as a plain text file, or by using a service like Pastebin.com. Reboot into your new Security Onion installation and login using the username/password you specified in the previous step. This will add the IPs to the host group in, Since we reused the syslog port group that is already defined, we dont need to create a new port group. 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. Once logs are generated by network sniffing processes or endpoints, where do they go? Also ensure you run rule-update on the machine. Inside of /opt/so/saltstack/local/salt/strelka/rules/localrules, add your YARA rules. so-rule allows you to disable, enable, or modify NIDS rules. 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. The set of processes includes sguild, mysql, and optionally the Elastic stack (Elasticsearch, Logstash, Kibana) and Curator. Any pointers would be appreciated. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. 41 - Network Segmentation, VLANs, and Subnets. Use one of the following examples in your console/terminal window: sudo nano local.rules sudo vim local.rules. 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. This directory stores the firewall rules specific to your grid. 1. Start by creating Berkeley Packet Filters (BPFs) to ignore any traffic that you don't want your network sensors to process. It incorporates NetworkMiner, CyberChef, Squert, Sguil, Wazuh, Bro, Suricata, Snort, Kibana, Logstash, Elasticsearch, and numerous other security onion tools. Hi @Trash-P4nda , I've just updated the documentation to be clearer. You can learn more about scapy at secdev.org and itgeekchronicles.co.uk. Files here should not be modified as changes would be lost during a code update. You may want to bump the SID into the 90,000,000 range and set the revision to 1. This error now occurs in the log due to a change in the exception handling within Salts event module. Please note! A. Within 15 minutes, Salt should then copy those rules into /opt/so/rules/nids/local.rules. Open /etc/nsm/rules/local.rules using your favorite text editor. 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. 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. alert icmp any any -> any any (msg: "ICMP Testing"; sid:1000001; rev:1;). If you right click on the, You can learn more about snort and writing snort signatures from the. 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. 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 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 . Set anywhere from 5 to 12 in the local_rules Kevin. Write your rule, see Rules Format and save it. 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. These policy types can be found in /etc/nsm/rules/downloaded.rules. Revision 39f7be52. Are you sure you want to create this branch? 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. 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. /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. This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. Salt sls files are in YAML format. Add the following to the sensor minion pillar file located at. Our instructors are the only Security Onion Certified Instructors in the world and our course material is the only authorized training material for Security Onion. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. One thing you can do with it (and the one that most people are interested in) is to configure it for IDS mode. https://docs.securityonion.net/en/2.3/local-rules.html?#id1. 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. Beta 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). The default allow rules for each node are defined by its role (manager, searchnode, sensor, heavynode, etc) in the grid. Revision 39f7be52. 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. 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. 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 idstools may seem like it is ignoring your disabled rules request if you try to disable a rule that has flowbits set. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. . If . Within 15 minutes, Salt should then copy those rules into /opt/so/rules/nids/local.rules. This directory contains the default firewall rules. 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 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. Between Zeek logs, alert data from Suricata, and full packet capture from Stenographer, you have enough information to begin identifying areas of interest and making positive changes to your security stance. For more information about Salt, please see https://docs.saltstack.com/en/latest/. 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. to security-onion When I run 'rule-update' it give an error that there are no rules in /usr/local/lib/snort_dynamicrules. Now that we have a signature that will generate alerts a little more selectively, we need to disable the original signature. 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, . 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. If you were to add a search node, you would see its IP appear in both the minion and the search_node host groups. By default, only the analyst hostgroup is allowed access to the nginx ports. MISP Rules. 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.

Famous Southern Baptist Pastors, Pasco County Future Road Projects, Sea Of Thieves Full Server Alliance, Pluto In 1st House Relationships, Articles S