![]() ![]() One is that as the number of alerts increases, you need to add more humans to scale. Incidentsįor many years, the default behavior of most IT security products was "spot something potentially malicious, alert a human." This has led to several problems. You can now manually add indicators on the new TI blade as well. You can also switch to Livestream mode, which will query the data as it's being streamed into Sentinel to catch attacks in real time.Īnother essential part of any SIEM is the ability to bring in Threat Intelligence (TI) feeds, with up-to-date indicators of risk (v4/v6 IP addresses, domain names, file hashes for malicious content, and URLs) so that if any of those show up in your logs, they can be flagged. If you're seeing something happening that's of interest, you can add bookmarks and comments. It's all free data you can explore more here. If you're not familiar, Mitre's framework is a way to categorize different attack methods, as well as link these to different groups of attackers. Each query matches one or more Mitre Att&ck tactics and techniques. Hunting and threat intelligenceĪs you become more familiar with digging through the log data, looking for signs of intrusions, you'll start hunting, customizing the built-in queries, but eventually branching out to build your own. Notebooks are built on new machine learning (ML) functionality in Azure, which in turn is built on Jupyter notebooks. If your queries grow and you need to add in more code and explanations for others to follow, you should look at notebooks along with visualizations. Using Common Event Format (CEF), you can import Check Point, Cisco, Fortinet, Palo Alto, ZScaler, and many others. The number of supported sources is too long to list here and is getting longer all the time, but some highlights include AWS (CloudTrail), Azure AD, Azure Defender (formerly Azure Security Center), Barracuda, F5, Forcepoint, and Zimperium. In general, cloud/API-based solutions are straightforward, whereas on-premises locations involve more work. ![]() The process for connecting sources varies. With the data in place, you can use built-in or custom alerts to find out when something fishy is going on as well as trawl through the data with advanced hunting. This is an excellent way to get started, as is the 31- day free trial. As mentioned above, if you're using Office 365, its log data can be ingested and analyzed at no extra cost. Once you have created a Sentinel workspace, you need to connect your data sources. It's no coincidence that both Google ( Chronicle) and Microsoft ( Sentinel) announced their cloud-based SIEMs at nearly the same time, both promoting the benefits of a cloud-based solution as requiring less infrastructure maintenance. Furthermore, as licensing costs are often based on the amount of data stored, choices are made to limit sources or the length of time log data is stored, which decreases visibility. I think it's fair to say that on-premises SIEMs have their challenges, often requiring a lot of care and feeding to maintain the infrastructure, taking away from the actual work of spotting intrusions. "Assume breach," on the other hand, moves the focus from just protecting the network and its resources toward adding planning, monitoring, and network segmentation for the time when you are compromised. ![]() "Zero trust" replaces the traditional "if you're on the corporate network, you are trusted" approach with one that evaluates each device connection, each login for each application/sensitive data for trustworthiness, and applies policies accordingly. ![]() It's the tool that gives you the visibility that a "zero trust/assume breach" approach demands. all forward their logs to this central location where (again, ideally) the data is analyzed, events correlated, and alerts raised as suspicious activity is detected. Endpoints, switches, routers, firewalls, proxies, VMs, cloud apps, etc. A SIEM is a central storage location for all your security and event logs from (ideally) all nodes on your network. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |