Data collection Examination 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. Files here should not be modified as changes would be lost during a code update. Security Onion is an open-source and free Linux distribution for log management, enterprise security monitoring, and intrusion detection. 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. Saltstack states are used to ensure the state of objects on a minion. This will add the host group to, Add the desired IPs to the host group. This is an advanced case and you most likely wont never need to modify these files. Copyright 2023 In order to apply the threshold to all nodes, place the pillar in /opt/so/saltstack/local/pillar/global.sls. Revision 39f7be52. You signed in with another tab or window. In many of the use cases below, we are providing the ability to modify a configuration file by editing either the global or minion pillar file. The set of processes includes sguild, mysql, and optionally the Elastic stack (Elasticsearch, Logstash, Kibana) and Curator. 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. If you right click on the, You can learn more about snort and writing snort signatures from the. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. To configure syslog for Security Onion: Stop the Security Onion service. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. . Ingest. 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 . Was this translation helpful? Give feedback. 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 The signature id (SID) must be unique. As shown above, we edit the minion pillar and add the SID to the idstools - sids - disabled section. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. 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. We offer both training and support for Security Onion. If you want to apply the threshold to a single node, place the pillar in /opt/so/saltstack/local/pillar/minions/.sls. For some alerts, your understanding of your own network and the business being transacted across it will be the deciding factor. Within 15 minutes, Salt should then copy those rules into /opt/so/rules/nids/local.rules. Naming convention: The collection of server processes has a server name separate from the hostname of the box. If so, then tune the number of AF-PACKET workers for sniffing processes. Start creating a file for your rule. After select all interfaces also ICMP logs not showing in sguil. Logs. For example, if you had a web server you could include 80 and 443 tcp into an alias or in this case a port group. Please note that Suricata 6 has a 64-character limitation on the IP field in a threshold. /opt/so/saltstack/default/salt/firewall/hostgroups.yaml is where the default hostgroups are defined. 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. > > > > > > > > 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. For example, if you dont care that users are accessing Facebook, then you can silence the policy-based signatures for Facebook access. The remainder of this section will cover the host firewall built into Security Onion. One of those regular interventions is to ensure that you are tuning properly and proactively attempting to reach an acceptable level of signal to noise. 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. to security-onion When I run 'rule-update' it give an error that there are no rules in /usr/local/lib/snort_dynamicrules. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. We created and maintain Security Onion, so we know it better than anybody else. 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. Copyright 2023 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. 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. Copyright 2023 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. . 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. Use one of the following examples in your console/terminal window: sudo nano local.rules sudo vim local.rules. /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. 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. 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. Port groups are a way of grouping together ports similar to a firewall port/service alias. 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. Hi @Trash-P4nda , I've just updated the documentation to be clearer. Please keep this value below 90 seconds otherwise systemd will reach timeout and terminate the service. Youll need to ensure the first of the two properly escapes any characters that would be interpreted by regex. Add the following to the minions sls file located at. When editing these files, please be very careful to respect YAML syntax, especially whitespace. 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. Security Onion. The default allow rules for each node are defined by its role (manager, searchnode, sensor, heavynode, etc) in the grid. In the configuration window, select the relevant form of Syslog - here, it's Syslog JSON - and click. 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. After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. Download Security Onion 20110116. Check out our NIDS tuning video at https://youtu.be/1jEkFIEUCuI! Double-click the Setup script on the Desktop and follow the prompts to configure and start the Sguil processes. For example, consider the following rules that reference the ET.MSSQL flowbit. More information on each of these topics can be found in this section. Check your syslog-ng configuration for the name of the local log source ("src" is used on SUSE systems). You need to configure Security Onion to send syslog so that InsightIDR can ingest it. 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 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 section will cover both network firewalls outside of Security Onion and the host-based firewall built into Security Onion. For more information, please see https://docs.saltproject.io/en/latest/topics/troubleshooting/yaml_idiosyncrasies.html. Revision 39f7be52. 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. 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 ->. You can add Wazuh HIDS rules in /opt/so/rules/hids/local_rules.xml. 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. . 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 Security Onion Layers Ubuntu based OS Snort, Suricata Snorby Bro Sguil Squert From https://docs.saltstack.com/en/latest/: Salt is a core component of Security Onion 2 as it manages all processes on all nodes. Apply the firewall state to the node, or wait for the highstate to run for the changes to happen automatically. 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. jq; so-allow; so-elastic-auth; so . IPS Policy 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. On Thursday, June 15, 2017 at 5:06:51 PM UTC+5:30, Wes wrote: Is it simply not triggering, or causing an error? This wiki is no longer maintained. You can learn more about scapy at secdev.org and itgeekchronicles.co.uk. /opt/so/saltstack/local/salt/firewall/portgroups.local.yaml defines custom port groups. If you were to add a search node, you would see its IP appear in both the minion and the search_node host groups. If you built the rule correctly, then snort should be back up and running. Security Onion has Snort built in and therefore runs in the same instance. This way, you still have the basic ruleset, but the situations in which they fire are altered. Any pointers would be appreciated. so-rule allows you to disable, enable, or modify NIDS rules. alert icmp any any -> any any (msg: "ICMP Testing"; sid:1000001; rev:1;). 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. 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. Custom rules can be added to the local.rules file Rule threshold entries can . 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. Can anyone tell me > > > > what I've done wrong please? idstools helpfully resolves all of your flowbit dependencies, and in this case, is re-enabling that rule for you on the fly. 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. In this file, the idstools section has a modify sub-section where you can add your modifications. Our documentation has moved to https://securityonion.net/docs/. Please review the Salt section to understand pillars and templates. 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. 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. If you would like to pull in NIDS rules from a MISP instance, please see the MISP Rules section. 3. Are you sure you want to create this branch? The county seat is in Evansville. 7.2. Local pillar file: This is the pillar file under /opt/so/saltstack/local/pillar/. This first sub-section will discuss network firewalls outside of Security Onion. 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 According to NIST, which step in the digital forensics process involves drawing conclusions from data? Cleaning up local_rules.xml backup files older than 30 days. Within 15 minutes, Salt should then copy those rules into /opt/so/rules/nids/local.rules. Start by creating Berkeley Packet Filters (BPFs) to ignore any traffic that you dont want your network sensors to process. Then tune your IDS rulesets. When editing these files, please be very careful to respect YAML syntax, especially whitespace. 1. In Security Onion, locally created rules are stored in /opt/so/rules/nids/local.rules. There isnt much in here other than anywhere, dockernet, localhost and self. 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 epic charting system training . 4. Set anywhere from 5 to 12 in the local_rules Kevin. We've been teaching Security Onion classes and providing Professional Services since 2014. c96 extractor. In a distributed deployment, the manager node controls all other nodes via salt. Where is it that you cannot view them? Long-term you should only run the rules necessary for > your environment. =========================================================================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=========================================================================. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. the rule is missing a little syntax, maybe try: alert icmp any any -> $HOME_NET any (msg:"ICMP Testing"; sid:1000001; rev:1;). To unsubscribe from this group and stop receiving emails from it, send an email to security-onio.@googlegroups.com. In syslog-ng, the following configuration forwards all local logs to Security Onion. 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. PFA local.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. Default YARA rules are provided from Florian Roths signature-base Github repo at https://github.com/Neo23x0/signature-base. 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. 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. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. For example, suppose we want to disable SID 2100498. Please update your bookmarks. You can see that we have an alert with the IP addresses we specified and the TCP ports we specified. These policy types can be found in /etc/nsm/rules/downloaded.rules. . Generate some traffic to trigger the alert. If it is, then the most expedient measure may be to resolve the misconfiguration and then reinvestigate tuning. Minion pillar file: This is the minion specific pillar file that contains pillar definitions for that node. Security. ELSA? 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,. 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 { Now that we have a signature that will generate alerts a little more selectively, we need to disable the original signature. 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. Please note! Revision 39f7be52. . However, generating custom traffic to test the alert can sometimes be a challenge. Let's add a simple rule that will alert on the detection of a string in a tcp session. It . 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.