On Thursday, June 15, 2017 at 5:06:51 PM UTC+5:30, Wes wrote: Is it simply not triggering, or causing an error? If you need to increase this delay, it can be done using the salt:minion:service_start_delay pillar. Default YARA rules are provided from Florian Roths signature-base Github repo at https://github.com/Neo23x0/signature-base. According to NIST, which step in the digital forensics process involves drawing conclusions from data? /opt/so/saltstack/default/salt/firewall/assigned_hostgroups.map.yaml is where the default allow rules come together and pair hostgroups and portgroups and assign that pairing to a node based on its role in the grid. MISP Rules. There are two directories that contain the yaml files for the firewall configuration. To add local YARA rules, create a directory in /opt/so/saltstack/local/salt/strelka/rules, for example localrules. Copyright 2023 5. (Alternatively, you can press Ctrl+Alt+T to open a new shell.) /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. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. Naming convention: The collection of server processes has a server name separate from the hostname of the box. 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. Please update your bookmarks. For more information about Salt, please see https://docs.saltstack.com/en/latest/. To verify the Snort version, type in snort -Vand hit Enter. 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. 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. Then tune your IDS rulesets. These non-manager nodes are referred to as salt minions. When editing these files, please be very careful to respect YAML syntax, especially whitespace. One thing you can do with it (and the one that most people are interested in) is to configure it for IDS mode. 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. You need to configure Security Onion to send syslog so that InsightIDR can ingest it. 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? Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. Adding local rules in Security Onion is a rather straightforward process. > To unsubscribe from this topic . 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,. 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. After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. The second only needs the $ character escaped to prevent bash from treating that as a variable. 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. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. 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. 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. For a quick primer on flowbits, see https://blog.snort.org/2011/05/resolving-flowbit-dependancies.html. 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. > > => I do not know how to do your guilde line. We offer both training and support for Security Onion. 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 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 . 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. This way, you still have the basic ruleset, but the situations in which they fire are altered. For example, if you dont care that users are accessing Facebook, then you can silence the policy-based signatures for Facebook access. Minion pillar file: This is the minion specific pillar file that contains pillar definitions for that node. Our documentation has moved to https://securityonion.net/docs/. For example, consider the following rules that reference the ET.MSSQL flowbit. This error now occurs in the log due to a change in the exception handling within Salts event module. Within 15 minutes, Salt should then copy those rules into /opt/so/rules/nids/local.rules. The remainder of this section will cover the host firewall built into Security Onion. If you would like to pull in NIDS rules from a MISP instance, please see the MISP Rules section. Logs . If it is, then the most expedient measure may be to resolve the misconfiguration and then reinvestigate tuning. Start by creating Berkeley Packet Filters (BPFs) to ignore any traffic that you don't want your network sensors to process. Copyright 2023 Then tune your IDS rulesets. 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. Start by creating Berkeley Packet Filters (BPFs) to ignore any traffic that you dont want your network sensors to process. 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. You signed in with another tab or window. Give feedback. 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 . However, generating custom traffic to test the alert can sometimes be a challenge. When configuring network firewalls for distributed deployments, youll want to ensure that nodes can connect as shown below. You can add NIDS rules in /opt/so/saltstack/local/salt/idstools/local.rules on your manager. We've been teaching Security Onion classes and providing Professional Services since 2014. If you are on a large network, you may need to do additional tuning like pinning processes to CPU cores. It . Long-term you should only run the rules necessary for > your environment. /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. in Sguil? the rule is missing a little syntax, maybe try: alert icmp any any -> $HOME_NET any (msg:"ICMP Testing"; sid:1000001; rev:1;). To get the best performance out of Security Onion, youll want to tune it for your environment. /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. In order to apply the threshold to all nodes, place the pillar in /opt/so/saltstack/local/pillar/global.sls. 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. In the configuration window, select the relevant form of Syslog - here, it's Syslog JSON - and click. 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). Now that we have a signature that will generate alerts a little more selectively, we need to disable the original signature. Security Onion includes best-of-breed free and open tools including Suricata, Zeek, Wazuh, the Elastic Stack and many others. If you have Internet access and want to have so-yara-update pull YARA rules from a remote Github repo, copy /opt/so/saltstack/local/salt/strelka/rules/, and modify repos.txt to include the repo URL (one per line). Firewall Requirements Salt minions must be able to connect to the manager node on ports 4505/tcp and 4506/tcp: Copyright 2023 You may want to bump the SID into the 90,000,000 range and set the revision to 1. Our appliances will save you and your team time and resources, allowing you to focus on keeping your organization secure. 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! Previously, in the case of an exception, the code would just pass. 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. To unsubscribe from this group and stop receiving emails from it, send an email to. 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. 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. > > > > > > > > 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. Salt is a new approach to infrastructure management built on a dynamic communication bus. However, generating custom traffic to test the alert can sometimes be a challenge. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. Logs. Host groups are similar to port groups but for storing lists of hosts that will be allowed to connect to the associated port groups. 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. This repository has been archived by the owner on Apr 16, 2021. Finally, from the manager, update the config on the remote node: You can manage threshold entries for Suricata using Salt pillars. Adding local rules in Security Onion is a rather straightforward process. Before You Begin. . Security Onion uses idstools to download new signatures every night and process them against a set list of user generated configurations. Beta 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. . Add the following to the minions sls file located at. 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. We created and maintain Security Onion, so we know it better than anybody else. The signature id (SID) must be unique. If you would like to create a rule yourself and use it with Suricata, this guide might be helpful. 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 By default, only the analyst hostgroup is allowed access to the nginx ports. In 2008, Doug Burks started working on Security Onion, a Linux distribution for intrusion detection, network security monitoring, and log management. In the image below, we can see how we define some rules for an eval node. Apply the firewall state to the node, or wait for the highstate to run for the changes to happen automatically. 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. 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. Youll need to ensure the first of the two properly escapes any characters that would be interpreted by regex. Local pillar file: This is the pillar file under /opt/so/saltstack/local/pillar/. All the following will need to be run from the manager. Use one of the following examples in your console/terminal window: sudo nano local.rules sudo vim local.rules. /opt/so/saltstack/local/salt/firewall/portgroups.local.yaml defines custom port groups. It incorporates NetworkMiner, CyberChef, Squert, Sguil, Wazuh, Bro, Suricata, Snort, Kibana, Logstash, Elasticsearch, and numerous other security onion tools. "; 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). 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. Backing up current local_rules.xml file. Our products include both the Security Onion software and specialized hardware appliances that are built and tested to run Security Onion. From https://docs.saltstack.com/en/latest/: Salt is a core component of Security Onion 2 as it manages all processes on all nodes. 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. I've just updated the documentation to be clearer. This is an advanced case and you most likely wont never need to modify these files. Security Onion has Snort built in and therefore runs in the same instance. These non-manager nodes are referred to as salt minions. 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. For some alerts, your understanding of your own network and the business being transacted across it will be the deciding factor. 7.2. 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. Security Onion is a intrusion detection and network monitoring tool. Files here should not be modified as changes would be lost during a code update. 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. 1. Security Onion is a free and open source platform for threat hunting, network security monitoring, and log management. Please provide the output of sostat-redacted, attaching as a plain text file, or by using a service like Pastebin.com. More information on each of these topics can be found in this section. The set of processes includes sguild, mysql, and optionally the Elastic stack (Elasticsearch, Logstash, Kibana) and Curator. Let's add a simple rule that will alert on the detection of a string in a tcp session. idstools helpfully resolves all of your flowbit dependencies, and in this case, is re-enabling that rule for you on the fly. Any definitions made here will override anything defined in other pillar files, including global. For example, suppose that we want to modify SID 2100498 and replace any instances of returned root with returned root test. Next, run so-yara-update to pull down the rules. However, generating custom traffic to test the alert can sometimes be a challenge. After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. 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. 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 can read more about this at https://redmine.openinfosecfoundation.org/issues/4377. You can find the latest version of this page at: https://securityonion.net/docs/AddingLocalRules. If you want to apply the threshold to a single node, place the pillar in /opt/so/saltstack/local/pillar/minions/.sls. This was implemented to avoid some issues that we have seen regarding Salt states that used the ip_interfaces grain to grab the management interface IP. Copyright 2023 For more information, please see https://docs.saltproject.io/en/latest/topics/troubleshooting/yaml_idiosyncrasies.html. However, the exception is now logged. 1. Salt sls files are in YAML format. 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. Double-click the Setup script on the Desktop and follow the prompts to configure and start the Sguil processes. You signed in with another tab or window. If this is a distributed deployment, edit local.rules on your master server and it will replicate to your sensors. To unsubscribe from this group and stop receiving emails from it, send an email to security-onio.@googlegroups.com. This is located at /opt/so/saltstack/local/pillar/minions/.sls. Please review the Salt section to understand pillars and templates. Adding local rules in Security Onion is a rather straightforward process. Answered by weslambert on Dec 15, 2021. 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. 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. 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. In a distributed deployment, the manager node controls all other nodes via salt. . 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 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. The error can be ignored as it is not an indication of any issue with the minions. You can add Wazuh HIDS rules in /opt/so/rules/hids/local_rules.xml. Diagnostic logs can be found in /opt/so/log/salt/. This will add the host group to, Add the desired IPs to the host group. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. All node types are added to the minion host group to allow Salt communication. 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. 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. 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. Generate some traffic to trigger the alert. These policy types can be found in /etc/nsm/rules/downloaded.rules. 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 Security Onion is a free and open platform for threat hunting, enterprise security monitoring, and log management. 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.
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