To unsubscribe from this group and stop receiving emails from it, send an email to. 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 Adding local rules in Security Onion is a rather straightforward process. If you dont want to wait for these automatic processes, you can run them manually from the manager (replacing $SENSORNAME_$ROLE as necessary): Lets add a simple rule to /opt/so/saltstack/local/salt/idstools/local.rules thats really just a copy of the traditional id check returned root rule: Restart Suricata (replacing $SENSORNAME_$ROLE as necessary): If you built the rule correctly, then Suricata should be back up and running. Adding local rules in Security Onion is a rather straightforward process. By default, only the analyst hostgroup is allowed access to the nginx ports. As you can see I have the Security Onion machine connected within the internal network to a hub. https://securityonion.net/docs/AddingLocalRules. 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. Important "Security Onion" Files and Directories - Medium'Re: [security-onion] Rule still triggering even after modifying to Convert PSI to MPA | Chapel Steel Convert psi to - francescolangella.it https://docs.securityonion.net/en/2.3/local-rules.html?#id1. 41 - Network Segmentation, VLANs, and Subnets. 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. You can learn more about scapy at secdev.org and itgeekchronicles.co.uk. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. How are they stored? For example, if you dont care that users are accessing Facebook, then you can silence the policy-based signatures for Facebook access. Diagnostic logs can be found in /opt/so/log/salt/. 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 you run so-allow or so-firewall, it modifies this file to include the IP provided in the proper hostgroup. 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. Inside of /opt/so/saltstack/local/salt/strelka/rules/localrules, add your YARA rules. 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. 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. After viewing your redacted sostat it seems that the ICMP and UDP rules are triggering: Are you using SO with in a VM? Escalate local privileges to root level. 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. Full Name. The server is also responsible for ruleset management. idstools helpfully resolves all of your flowbit dependencies, and in this case, is re-enabling that rule for you on the fly. Revision 39f7be52. Backing up current downloaded.rules file before it gets overwritten. (Archived 1/22) Tuning NIDS Rules in Security Onion - YouTube In Security Onion, locally created rules are stored in /opt/so/rules/nids/local.rules. 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. See above for suppress examples. However, generating custom traffic to test the alert can sometimes be a challenge. Tracking. Security Onion a free and open platform for intrusion detection, enterprise security monitoring, and log management. After adding your rules, update the configuration by running so-strelka-restart on all nodes running Strelka. Add the following to the sensor minion pillar file located at. These non-manager nodes are referred to as salt minions. 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. 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. 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. Find Age Regression Discord servers and make new friends! This writeup contains a listing of important Security Onion files and directories. This is located at /opt/so/saltstack/local/pillar/minions/.sls. However, generating custom traffic to test the alert can sometimes be a challenge. 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. This will add the host group to, Add the desired IPs to the host group. 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. 2. These are the files that will need to be changed in order to customize nodes. "; 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). This first sub-section will discuss network firewalls outside of Security Onion. 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. In the image below, we can see how we define some rules for an eval node. 4. All the following will need to be run from the manager. Salt can be used for data-driven orchestration, remote execution for any infrastructure, configuration management for any app stack, and much more. 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. 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. Logs Security Onion 2.3 documentation We created and maintain Security Onion, so we know it better than anybody else. Local YARA rules Discussion #6556 Security-Onion - GitHub There are three alerting engines within Security Onion: Suricata, Wazuh and Playbook (Sigma). /opt/so/saltstack/local/salt/firewall/portgroups.local.yaml defines custom port groups. /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. lawson cedars. 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. The set of processes includes sguild, mysql, and optionally the Elastic stack (Elasticsearch, Logstash, Kibana) and Curator. You can add Wazuh HIDS rules in /opt/so/rules/hids/local_rules.xml. Security Onion Set Up Part 3: Configuration of Version 14.04 Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. 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. Assuming you have Internet access, Security Onion will automatically update your NIDS rules on a daily basis. It . 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. Adding Your Own Rules . 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. This repository has been archived by the owner on Apr 16, 2021. Started by Doug Burks, and first released in 2009, Security Onion has. If you are on a large network, you may need to do additional tuning like pinning processes to CPU cores. Introduction Adding local rules in Security Onion is a rather straightforward process. Security Onion is a platform that allows you to monitor your network for security alerts. the rule is missing a little syntax, maybe try: alert icmp any any -> $HOME_NET any (msg:"ICMP Testing"; sid:1000001; rev:1;). Any definitions made here will override anything defined in other pillar files, including global. 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. 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. 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. Here, we will show you how to add the local rule and then use the python library scapy to trigger the alert. You need to configure Security Onion to send syslog so that InsightIDR can ingest it. . securityonion-docs/local-rules.rst at master Security-Onion-Solutions It is now read-only. 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. If you need to increase this delay, it can be done using the salt:minion:service_start_delay pillar. These policy types can be found in /etc/nsm/rules/downloaded.rules. Some node types get their IP assigned to multiple host groups. /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. Snort local rules not updated - Google Groups (Archived 1/22) Tuning NIDS Rules in Security Onion Security Onion 7.5K subscribers 48 Dislike Share 1,465 views Dec 22, 2021 This video has been archived as of January 2022 - the latest. Generate some traffic to trigger the alert. Revision 39f7be52. Any pointers would be appreciated. Start by creating Berkeley Packet Filters (BPFs) to ignore any traffic that you don't want your network sensors to process. 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 ->. . All node types are added to the minion host group to allow Salt communication. Security Onion: A Linux Distro For IDS, NSM, And Log Management | Unixmen Please note that Suricata 6 has a 64-character limitation on the IP field in a threshold. Data collection Examination We've been teaching Security Onion classes and providing Professional Services since 2014. How are they parsed? Check your syslog-ng configuration for the name of the local log source ("src" is used on SUSE systems).
