You can add Wazuh HIDS rules in /opt/so/rules/hids/local_rules.xml. This wiki is no longer maintained. 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 Salt sls files are in YAML format. Give feedback. You can learn more about snort and writing snort signatures from the Snort Manual. 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. I've just updated the documentation to be clearer. In order to apply the threshold to all nodes, place the pillar in /opt/so/saltstack/local/pillar/global.sls. You could try testing a rule . Revision 39f7be52. Default YARA rules are provided from Florian Roths signature-base Github repo at https://github.com/Neo23x0/signature-base. These are the files that will need to be changed in order to customize nodes. 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. Next, run so-yara-update to pull down the rules. Data collection Examination Tracking. 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. If you right click on the, You can learn more about snort and writing snort signatures from the. You can then run curl http://testmynids.org/uid/index.html on the node to generate traffic which should cause this rule to alert (and the original rule that it was copied from, if it is enabled). Here are some of the items that can be customized with pillar settings: Currently, the salt-minion service startup is delayed by 30 seconds. In a distributed deployment, the manager node controls all other nodes via salt. lawson cedars. > > => I do not know how to do your guilde line. When I run sostat. 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. To get the best performance out of Security Onion, youll want to tune it for your environment. Are you sure you want to create this branch? However, generating custom traffic to test the alert can sometimes be a challenge. These non-manager nodes are referred to as salt minions. After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. If . Any pointers would be appreciated. In 2008, Doug Burks started working on Security Onion, a Linux distribution for intrusion detection, network security monitoring, and log management. Now that we have a signature that will generate alerts a little more selectively, we need to disable the original signature. To unsubscribe from this group and stop receiving emails from it, send an email to. Some node types get their IP assigned to multiple host groups. Copyright 2023 However, generating custom traffic to test the alert can sometimes be a challenge. Backing up current local_rules.xml file. At those times, it can be useful to query the database from the commandline. 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. /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. Set anywhere from 5 to 12 in the local_rules Kevin. 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. 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 Start by creating Berkeley Packet Filters (BPFs) to ignore any traffic that you dont want your network sensors to process. 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. 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. 3. Generate some traffic to trigger the alert. Backing up current downloaded.rules file before it gets overwritten. 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. 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. Escalate local privileges to root level. Local pillar file: This is the pillar file under /opt/so/saltstack/local/pillar/. Copyright 2023 If you would like to pull in NIDS rules from a MISP instance, please see: Can anyone tell me > > > > what I've done wrong please? "; 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). 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 41 - Network Segmentation, VLANs, and Subnets. You signed in with another tab or window. 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 ->. In syslog-ng, the following configuration forwards all local logs to Security Onion. For a Security Onion client, you should dedicate at least 2GB RAM, but ideally 4GB if possible. There are many ways to achieve age regression, but the three primary methods are: Botox. The remainder of this section will cover the host firewall built into Security Onion. 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. Double-click the Setup script on the Desktop and follow the prompts to configure and start the Sguil processes. 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. Security Onion includes best-of-breed free and open tools including Suricata, Zeek, Wazuh, the Elastic Stack and many others. 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. Revision 39f7be52. It incorporates NetworkMiner, CyberChef, Squert, Sguil, Wazuh, Bro, Suricata, Snort, Kibana, Logstash, Elasticsearch, and numerous other security onion tools. In the configuration window, select the relevant form of Syslog - here, it's Syslog JSON - and click. 3. 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). Previously, in the case of an exception, the code would just pass. Where is it that you cannot view them? Security Onion has Snort built in and therefore runs in the same instance. From the Command Line. In a distributed deployment, the manager node controls all other nodes via salt. If you would like to create a rule yourself and use it with Suricata, this guide might be helpful. 4. Please provide the output of sostat-redacted, attaching as a plain text file, or by using a service like Pastebin.com. 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. Download Security Onion 20110116. Saltstack states are used to ensure the state of objects on a minion. 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. 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. . 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. 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. 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. in Sguil? For a quick primer on flowbits, see https://blog.snort.org/2011/05/resolving-flowbit-dependancies.html. Manager of Support and Professional Services. Global pillar file: This is the pillar file that can be used to make global pillar assignments to the nodes. Was this translation helpful? https://docs.securityonion.net/en/2.3/local-rules.html?#id1. 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. The second only needs the $ character escaped to prevent bash from treating that as a variable. Adding local rules in Security Onion is a rather straightforward process. 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. On Thursday, June 15, 2017 at 5:06:51 PM UTC+5:30, Wes wrote: Is it simply not triggering, or causing an error? Inside of /opt/so/saltstack/local/salt/strelka/rules/localrules, add your YARA rules. Security Onion is a intrusion detection and network monitoring tool. 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. /opt/so/saltstack/default/salt/firewall/portgroups.yaml is where the default port groups are defined. Salt is a new approach to infrastructure management built on a dynamic communication bus. Managing Rules; Adding Local Rules; Managing Alerts; High Performance Tuning; Tricks and Tips. 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. 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. The territories controlled by the ROC consist of 168 islands, with a combined area of 36,193 square . And when I check, there are no rules there. You can see that we have an alert with the IP addresses we specified and the TCP ports we specified. After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. 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. idstools helpfully resolves all of your flowbit dependencies, and in this case, is re-enabling that rule for you on the fly. . If you built the rule correctly, then snort should be back up and running. Assuming you have Internet access, Security Onion will automatically update your NIDS rules on a daily basis. 1. The set of processes includes sguild, mysql, and optionally the Elastic stack (Elasticsearch, Logstash, Kibana) and Curator. Have you tried something like this, in case you are not getting traffic to $HOME_NET? Finally, from the manager, update the config on the remote node: You can manage threshold entries for Suricata using Salt pillars. ELSA? 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. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. 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. 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. The files in this directory should not be modified as they could possibly be overwritten during a soup update in the event we update those files. Revision 39f7be52. Salt is a core component of Security Onion 2 as it manages all processes on all nodes. Introduction Adding local rules in Security Onion is a rather straightforward process. 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. 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) Revision 39f7be52. Generate some traffic to trigger the alert. If so, then tune the number of AF-PACKET workers for sniffing processes. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. 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. 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. 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. We created and maintain Security Onion, so we know it better than anybody else. https://securityonion.net/docs/AddingLocalRules. You may want to bump the SID into the 90,000,000 range and set the revision to 1. When you purchase products and services from us, you're helping to fund development of Security Onion! When editing these files, please be very careful to respect YAML syntax, especially whitespace. Adding local rules in Security Onion is a rather straightforward process. Security Onion generates a lot of valuable information for you the second you plug it into a TAP or SPAN port. Find Age Regression Discord servers and make new friends! More information on each of these topics can be found in this section. This first sub-section will discuss network firewalls outside of Security Onion. When editing these files, please be very careful to respect YAML syntax, especially whitespace. 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. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. Another consideration is whether or not the traffic is being generated by a misconfigured piece of equipment. Tried as per your syntax, but still issue persists. Then tune your IDS rulesets. You may want to bump the SID into the 90,000,000 range and set the revision to 1. 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. 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 can learn more about scapy at secdev.org and itgeekchronicles.co.uk. Open /etc/nsm/rules/local.rules using your favorite text editor. Port groups are a way of grouping together ports similar to a firewall port/service alias. If you need to increase this delay, it can be done using the salt:minion:service_start_delay pillar. Custom rules can be added to the local.rules file Rule threshold entries can . and dont forget that the end is a semicolon and not a colon. For example, suppose that we want to modify SID 2100498 and replace any instances of returned root with returned root test. This repository has been archived by the owner on Apr 16, 2021. In Security Onion, locally created rules are stored in /opt/so/rules/nids/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. Reboot into your new Security Onion installation and login using the username/password you specified in the previous step. For more information, please see https://docs.saltproject.io/en/latest/topics/troubleshooting/yaml_idiosyncrasies.html. /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. Copyright 2023 Please note that Suricata 6 has a 64-character limitation on the IP field in a threshold. Diagnostic logs can be found in /opt/so/log/salt/. Once logs are generated by network sniffing processes or endpoints, where do they go? Youll need to ensure the first of the two properly escapes any characters that would be interpreted by regex. To unsubscribe from this group and stop receiving emails from it, send an email to security-onio.@googlegroups.com. 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). . This directory stores the firewall rules specific to your grid. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. To verify the Snort version, type in snort -Vand hit Enter. Check your syslog-ng configuration for the name of the local log source ("src" is used on SUSE systems). A. For example, consider the following rules that reference the ET.MSSQL flowbit. If it is, then the most expedient measure may be to resolve the misconfiguration and then reinvestigate tuning. 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. Within 15 minutes, Salt should then copy those rules into /opt/so/rules/nids/local.rules. /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. Once your rules and alerts are under control, then check to see if you have packet loss. 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. 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. Also ensure you run rule-update on the machine. To configure syslog for Security Onion: Stop the Security Onion service. Start creating a file for your rule. In this file, the idstools section has a modify sub-section where you can add your modifications. 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. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. 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. To enabled them, either revert the policy by remarking the ips_policy line (and run rule-update), or add the policy type to the rules in local.rules. If 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. jq; so-allow; so-elastic-auth; so . Files here should not be modified as changes would be lost during a code update. 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 . /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. You need to configure Security Onion to send syslog so that InsightIDR can ingest it.
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