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. You can see that we have an alert with the IP addresses we specified and the TCP ports we specified. For example, if you include a bad custom snort rule with incorrect syntax, the snort engine will fail . Salt sls files are in YAML format. Our products include both the Security Onion software and specialized hardware appliances that are built and tested to run Security Onion. If you would like to pull in NIDS rules from a MISP instance, please see the MISP Rules section. The second only needs the $ character escaped to prevent bash from treating that as a variable. You can read more about this at https://redmine.openinfosecfoundation.org/issues/4377. Re: [security-onion] Snort Local rules not getting alerts in ELSA / SQUERT 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. You need to configure Security Onion to send syslog so that InsightIDR can ingest it. More information on each of these topics can be found in this section. . Then tune your IDS rulesets. Give feedback. Security Onion is a free and open platform for threat hunting, enterprise security monitoring, and log management. If you would like to create a rule yourself and use it with Suricata, this guide might be helpful. When editing these files, please be very careful to respect YAML syntax, especially whitespace. 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. 5. Copyright 2023 4. Find Age Regression Discord servers and make new friends! You may want to bump the SID into the 90,000,000 range and set the revision to 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 Start by creating Berkeley Packet Filters (BPFs) to ignore any traffic that you don't want your network sensors to process. There are three alerting engines within Security Onion: Suricata, Wazuh and Playbook (Sigma). 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 { Cleaning up local_rules.xml backup files older than 30 days. This wiki is no longer maintained. Start creating a file for your rule. 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). 7.2. Adding local rules in Security Onion is a rather straightforward process. After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. To unsubscribe from this group and stop receiving emails from it, send an email to security-onio.@googlegroups.com. 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. On Thursday, June 15, 2017 at 5:06:51 PM UTC+5:30, Wes wrote: Is it simply not triggering, or causing an error? (Alternatively, you can press Ctrl+Alt+T to open a new shell.) Security Onion generates a lot of valuable information for you the second you plug it into a TAP or SPAN port. If you pivot from that alert to the corresponding pcap you can verify the payload we sent. A Campus Card is your University of Reading student/staff/associate OSSEC custom rules not generating alerts - Google Groups 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). in Sguil? If so, then tune the number of AF-PACKET workers for sniffing processes. 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. 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. Please keep this value below 90 seconds otherwise systemd will reach timeout and terminate the service. Host groups are similar to port groups but for storing lists of hosts that will be allowed to connect to the associated port groups. 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. To verify the Snort version, type in snort -Vand hit Enter. Before You Begin. Let's add a simple rule that will alert on the detection of a string in a tcp session. alert icmp any any -> any any (msg: "ICMP Testing"; sid:1000001; rev:1;). Home About Us Bill Pay 877-213-8180 Product Library My accountItems of interest (0) Get your campus card Your campus card allows you to borrow books from the Library, use services at the student centre, make payments at Macquarie University retail outlets, and identify yourself during class tests and . Revision 39f7be52. Adding local rules in Security Onion is a rather straightforward process. This is located at /opt/so/saltstack/local/pillar/minions/.sls. There are two directories that contain the yaml files for the firewall configuration. If you would like to pull in NIDS rules from a MISP instance, please see: Start by creating Berkeley Packet Filters (BPFs) to ignore any traffic that you dont want your network sensors to process. 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. Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. Generate some traffic to trigger the alert. Please provide the output of sostat-redacted, attaching as a plain text file, or by using a service like Pastebin.com. By default, only the analyst hostgroup is allowed access to the nginx ports. Tuning Security Onion 2.3 documentation In 2008, Doug Burks started working on Security Onion, a Linux distribution for intrusion detection, network security monitoring, and log management. Please note that Suricata 6 has a 64-character limitation on the IP field in a threshold. After viewing your redacted sostat it seems that the ICMP and UDP rules are triggering: Are you using SO with in a VM? Once logs are generated by network sniffing processes or endpoints, where do they go? 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. It . 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. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. However, generating custom traffic to test the alert can sometimes be a challenge. To configure syslog for Security Onion: Stop the Security Onion service. 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. In order to apply the threshold to all nodes, place the pillar in /opt/so/saltstack/local/pillar/global.sls. There may be entire categories of rules that you want to disable first and then look at the remaining enabled rules to see if there are individual rules that can be disabled. Please review the Salt section to understand pillars and templates. MISP Rules. Security Onion is an open-source and free Linux distribution for log management, enterprise security monitoring, and intrusion detection. /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. Finally, run so-strelka-restart to allow Strelka to pull in the new rules. idstools may seem like it is ignoring your disabled rules request if you try to disable a rule that has flowbits set. All node types are added to the minion host group to allow Salt communication. A. Diagnostic logs can be found in /opt/so/log/salt/. /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. 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. Run so-rule without any options to see the help output: We can use so-rule to modify an existing NIDS rule. 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. To add local YARA rules, create a directory in /opt/so/saltstack/local/salt/strelka/rules, for example localrules. Security Onion Layers Ubuntu based OS Snort, Suricata Snorby Bro Sguil Squert We've been teaching Security Onion classes and providing Professional Services since 2014. 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 Security onion troubleshooting - silvestermallorca.de Next, run so-yara-update to pull down the rules. Are you sure you want to create this branch? Then tune your IDS rulesets. Where is it that you cannot view them? Naming convention: The collection of server processes has a server name separate from the hostname of the box. Local YARA rules Discussion #6556 Security-Onion - GitHub c96 extractor. Set anywhere from 5 to 12 in the local_rules Kevin. The county seat is in Evansville. Open /etc/nsm/rules/local.rules using your favorite text editor. ManagingAlerts Security-Onion-Solutions/security-onion Wiki - GitHub 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. 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 includes best-of-breed free and open tools including Suricata, Zeek, Wazuh, the Elastic Stack and many others. This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. For some alerts, your understanding of your own network and the business being transacted across it will be the deciding factor. Durian - Wikipedia You received this message because you are subscribed to the Google Groups "security-onion" group. AddingLocalRules Security-Onion-Solutions/security-onion Wiki 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. 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. ELSA? Saltstack states are used to ensure the state of objects on a minion. Security Onion: An Interesting Guide For 2021 - Jigsaw Academy You signed in with another tab or window. and dont forget that the end is a semicolon and not a colon. 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. The county seat is in Evansville. While Vanderburgh County was the The remainder of this section will cover the host firewall built into Security Onion. For a quick primer on flowbits, see https://blog.snort.org/2011/05/resolving-flowbit-dependancies.html. CCNA Cyber Ops (Version 1.1) - Chapter 12 Exam Answers Full Boot the ISO and run through the installer. Salt sls files are in YAML format. 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. 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. Security Onion | Web3us LLC After select all interfaces also ICMP logs not showing in sguil. Add the following to the sensor minion pillar file located at. All the following will need to be run from the manager. Cannot retrieve contributors at this time. 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. For example, consider the following rules that reference the ET.MSSQL flowbit. 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). That's what we'll discuss in this section. 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. so-rule allows you to disable, enable, or modify NIDS rules. . Introduction to Sguil and Squert: Part 1 - 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. This writeup contains a listing of important Security Onion files and directories. As you can see I have the Security Onion machine connected within the internal network to a hub. Reboot into your new Security Onion installation and login using the username/password you specified in the previous step. Finally, from the manager, update the config on the remote node: You can manage threshold entries for Suricata using Salt pillars. In Security Onion, locally created rules are stored in /opt/so/rules/nids/local.rules. 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. 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. 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. When I run sostat. 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. I've just updated the documentation to be clearer. 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. However, the exception is now logged. 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. the rule is missing a little syntax, maybe try: alert icmp any any -> $HOME_NET any (msg:"ICMP Testing"; sid:1000001; rev:1;). 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. Answered by weslambert on Dec 15, 2021. Important "Security Onion" Files and Directories - Medium No rules in /usr/local/lib/snort_dynamicrules - Google Groups 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. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. Salt is a core component of Security Onion 2 as it manages all processes on all nodes. Check your syslog-ng configuration for the name of the local log source ("src" is used on SUSE systems). /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. 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. As shown above, we edit the minion pillar and add the SID to the idstools - sids - disabled section. It is now read-only. Apply the firewall state to the node, or wait for the highstate to run for the changes to happen automatically. Security Onion Set Up Part 3: Configuration of Version 14.04 To unsubscribe from this group and stop receiving emails from it, send an email to. If you need to increase this delay, it can be done using the salt:minion:service_start_delay pillar. epic charting system training In Security Onion, locally created rules are stored in /opt/so/rules/nids/local.rules. Inside of /opt/so/saltstack/local/salt/strelka/rules/localrules, add your YARA rules. > To unsubscribe from this topic . This directory contains the default firewall rules. Copyright 2023 'Re: [security-onion] Rule still triggering even after modifying to Revision 39f7be52. It incorporates NetworkMiner, CyberChef, Squert, Sguil, Wazuh, Bro, Suricata, Snort, Kibana, Logstash, Elasticsearch, and numerous other security onion tools. Modifying these values outside of so-allow or so-firewall could lead to problems accessing your existing hosts. Logs . I went ahead and put in the below rules under /etc/nsm/local.rules and ran the rule-update command. local.rules not working Any line beginning with "#" can be ignored as it is a comment. Also ensure you run rule-update on the machine. Rules Security-Onion-Solutions/security-onion Wiki GitHub In the configuration window, select the relevant form of Syslog - here, it's Syslog JSON - and click. 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. Please note! Adding Your Own Rules . Previously, in the case of an exception, the code would just pass. Age Regression SuppliesWelcome Welcome to Gabby's Little Store! This is Assuming you have Internet access, Security Onion will automatically update your NIDS rules on a daily basis. Now we have to build the association between the host group and the syslog port group and assign that to our sensor node. A tag already exists with the provided branch name. 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. Tracking. 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. It is located at /opt/so/saltstack/local/pillar/global.sls. 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. The signature id (SID) must be unique. Long-term you should only run the rules necessary for > your environment. Salt is a new approach to infrastructure management built on a dynamic communication bus. Port groups are a way of grouping together ports similar to a firewall port/service alias. You could try testing a rule . 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. 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 Open /etc/nsm/rules/local.rules using your favorite text editor. Tried as per your syntax, but still issue persists. To get the best performance out of Security Onion, youll want to tune it for your environment. Interested in discussing how our products and services can help your organization? 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. The territories controlled by the ROC consist of 168 islands, with a combined area of 36,193 square . Our appliances will save you and your team time and resources, allowing you to focus on keeping your organization secure. Salt Security Onion 2.3 documentation The set of processes includes sguild, mysql, and optionally the Elastic stack (Elasticsearch, Logstash, Kibana) and Curator. /opt/so/saltstack/default/salt/firewall/hostgroups.yaml is where the default hostgroups are defined. 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. 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. When editing these files, please be very careful to respect YAML syntax, especially whitespace. In syslog-ng, the following configuration forwards all local logs to Security Onion. =========================================================================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=========================================================================. 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 41 - Network Segmentation, VLANs, and Subnets. 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) 3. Managing Rules; Adding Local Rules; Managing Alerts; High Performance Tuning; Tricks and Tips. 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). FAQ Security-Onion-Solutions/security-onion Wiki GitHub Alternatively, run salt -G 'role:so-sensor' cmd.run "so-strelka-restart" to restart Strelka on all sensors at once. 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). If you want to apply the threshold to a single node, place the pillar in /opt/so/saltstack/local/pillar/minions/.sls. 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. 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! Adding Local Rules Security Onion 2.3 documentation Within 15 minutes, Salt should then copy those rules into /opt/so/rules/nids/local.rules. Security Onion Lab Setup with VirtualBox | Free Video Tutorial - Udemy