We were looking for a system with a single pane of glass. The journey started with deploying the EDR client on the servers, which is called Trend Micro™ Deep Security, and Trend Micro Apex One™ on the endpoints, such as desktops and laptops. We then connected them to a single pane of glass, which was called XDR, now known as Trend Vision One. It has helped us to correctly hunt and fix. We could see the communication between the endpoints and the servers and anything else they were talking to. We could then further expand it and connect it to all of the systems through APIs. That was the initial requirement we had, and it worked very well in that sense.

When you buy extensive or expensive SIEM solutions, such as Splunk or something else, what happens is that you need analytics. You can write meaningful queries to query the data. At the end of the day, all the data going in needs to be correlated. Trend Vision One provides visibility in that sense.

We connected it to the cloud, so we could see the telemetry from Azure and cloud. We then installed the network detection response. It could see and detect a little movement from the network layer. We then connected it to Active Directory, so we could have attribution happening. We currently have a lot of data coming. With a small team, the issue that arises is how to deal with so much information and how to prioritize. It helps with the prioritization. The system is smart enough to proactively go and scan the logs and trigger workflow alerts. It prioritizes them based on the criticality, such as high, medium, low, or informational. When you have a small team, your analysts can go and start looking into those and see what is happening and what they need to prioritize at a stage.

We came very close to a Russian threat actor and Trend Vision One helped tremendously. It helped us to control the attack in the initial stages. They got into the environment and they got the reverse shell out. I saw the alert. Trend Vision One Protection showed me in detail what they ran, what they queried, what information was captured, and where the connections were going out. It was an initial access broker that had done the attack. If this information was not picked up on the late Friday afternoon, you can imagine what could have happened by Monday. Within hours, that information would have gone on to the dark net and would have been sold to a ransomware gang. The mean time to respond was reduced significantly. It is very rare for most organizations to detect such attacks in their own environment within the first four hours. It reduced the mean time to respond by 70% to 80%.

Its real-time monitoring capabilities help a lot in our overall security posture. We have everything configured to our central SOC email system, so the minute an alert is fired and depending on what criticality it is, we can work on it. When you work in the health industry, you often work with vendors who are still not very cybersecurity conscious. They are still learning. One of them plugged in a USB drive, and we found an early indicator of compromise. The device was plugged into one of the technical systems. It not only detected and blocked that, but we also got the alert pointing to the machine. If it was not detected and picked up at that very stage within a matter of minutes, it could have had a pretty big impact eventually.

The beauty is that I do not need to go and log in to the separate console of Apex One or Deep Security. I have got all the visibility and telemetry feeding in real-time into the Trend Vision One console. The Trend Vision One console straightaway alerts you. It just flashes a critical alert. It blocks, but then it provides mitigation recommendations. We need to take the machine off the network, scan the USB, educate the user, and escalate to the right people. Having all that information at hand is very crucial. We can influence the user behavior as well so that they do not do that again.

We are using it on endpoints. We are using it on our servers. We have a network detection response, which is called NDR. We are monitoring all the internal traffic coming from the firewalls. We have Citrix NetScalers, so we are monitoring the network side as well. We also have another product called Conformity that does a cloud assessment and compliance check for all externally exposed cloud assets. It tells you if they are not in compliance. For example, with the project that went in, something might get exposed accidentally, such as an Azure storage account, to the Internet. It all feeds into Trend Vision One, and we have a single pane of glass.

It is helpful for multiple teams. It is not only limited to SOC. We have teams from the cloud side and sometimes from the endpoint and the server side who can get in, and they can see the alerts. It makes it easier to work because we all are seeing the same thing with more information. So, we are using it for our endpoint servers and network. We are using it for monitoring our Azure cloud. We also have something called Trend Micro™ Cloud App Security licenses as part of our licensing. We have policies that do advanced threat protection monitoring and DLP monitoring on the SaaS channels, such as Exchange Online, Teams, OneDrive, and SharePoint sites. These are other channels from where the data can be shared, the data can enter our environment, or the data can go out of our environment. It has policies to monitor DLP. It has policies to monitor any malicious files or any indicators of an ATP attack. We get those alerts as well.

There are two dashboards. The Executive Dashboards give an overall view of the entire system and what is happening on our system at any point in time. We can see how many outstanding vulnerabilities we have, what we need to report to the management, and how we will be progressing for things like that. Then we have the Operational dashboard with real-time alerts or pending alerts. It shows us that we have some account that is a match from a .Net data lake. A problem, for example, is that most users keep the same password, so you could have the same account password for your work account and for your personal account. They can get compromised at home and work as well. So, we use Executive Dashboards for reporting and overall understanding of what is happening in the environment and what we need to report and prioritize. The Operational dashboard is for day-to-day work.

It is very important that we are able to drill down from the Executive Dashboards into XDR detections. We are in the health industry. We are a hospital. The board is not only worried about ransomware because that can happen to anyone. You can never be safe enough. They are also concerned about the damage to our reputation and the operational cost of recovering, so they are very keen to have visibility. The Executive Dashboards give us good enough information to filter that. For example, our desktop support team has a limited set of people. For cybersecurity, we want to prioritize patching for a zero-day threat, but sometimes, it cannot happen because the teams have other priorities. The issue is not that they do not want to help, but they do not have resources. With Executive Dashboards and reporting, we can escalate things to the board saying that we need some attention. We can ask them to fund us with more resources to get this across the line. It helps us dictate the impact and prioritize a critical cybersecurity vulnerability so that we can get the management's buy-in to prioritize it and address it before it goes out of hand.

We use the Risk Index feature to map against other organizations in the same geographic region to see how we are doing in terms of risks as compared to other organizations. Are we better or worse than others? If we have some areas where we are worse than others, they help us to understand the reason and how to improve.

If we want to go through every single event, then with our current licensing, XDR can hold up to six months of data, which could be millions or thousands of alerts. A smart thing that they have done is to provide the Workbench, which automatically prioritizes. It does the hard work for you by pulling that intel and saying that these are the highly critical ones that you need to address as soon as possible. I am not discounting the fact that sometimes, attackers do not even go for highly critical ones. They go for a medium one, but it helps us to get them out of the way. Our team is small, and I had a good experience training a few people, taking them through, and showing them how to do it. Once people start working, they understand the workflow. It just becomes a second habit. It is very intuitive. You can get into the console, add new indicators of compromise, add new threat-hunting queries, add new CTI feeds, and check for new vulnerabilities. There is so much you can get out of it. You just have to prioritize what you think is important for that day.

We do use Managed XDR as a second service. The way that comes in handy is that we do have people on call. I, for sure, keep checking my emails, but if we have a critical alert that no one has attended from our side, they triage it. They triage it very well and then rate it. For example, they might say, "It seems to be benign or negative, but an alert came in, and no one was available. If you want to add an extra layer of security or caution, here is the mitigation." They are very responsive. I was able to see the big attack that we had two years ago within the first four hours, and by the time it got to the XDR, it was all correlated. Within half an hour, their response team came to the same conclusion. They reached out to us when I was about to reach out to them, so we were on the same page. They are definitely a good backup or a second solution for us. Also, some of the alerts can come up from workflows. They may seem malicious but they are not. The Managed XDR service people come back to us just to reconfirm that. We tell them that it is a known file. They do not need to worry about it. Sometimes, we might miss something or have no idea about the next step. They then come up with a recommendation about what we need to do. It is a very good service to have.

We are using Attack Surface Discovery to monitor the devices we have and the internet-facing assets, accounts, and applications. API is something we are still looking into, but with a few clicks, we get an overview. We can see how many are patched and how many are exposed externally or internet-facing assets. We have a lot of subdomains linked to the primary hospital site for different projects and workflows. We can see how they are doing, which ports are open, and which known vulnerabilities are there because some of them are not managed by us. They are managed by externally hosted vendors, so we can keep them in check. The same is applicable to our accounts. If we have accounts that are on the dark net, or we have accounts with excessive privileges that can potentially be exploited, we can address that.

For applications, the feature that I like the most is called the Cloud App List. It basically looks at all the SaaS applications and benchmarks them. It profiles them based on the rest and gives us a report. It tells us that certain apps that people are using may not be officially sanctioned by us. For an unsanctioned app, they do a risk profiling through Trend Vision One, which shows us which security compliance standard it has gone through from the vendor. They give us a quick understanding of how bad or good it is to continue using an application.

During the COVID time, I was setting up Trend Vision One, and I got an informational alert. The husband of a nurse gave her a USB, and she plugged it in. She was in an off-site environment, but the Trend client was still running. The clients were connected to the SaaS console or the Internet, so all telemetry was still being fed. They must have thought that it was not the case, but detections were still coming. When she plugged it in, it downloaded a power shell exploitation framework, which they were able to map to an ATP group from China that commonly uses this technique for intellectual property exfiltration. I quite like how much visibility it provides. For a couple of applications here, sometimes an alert comes in, and it can even drill down to the last command that was executed. It can create an attack graph and show you the full execution profile. It helps you troubleshoot and filter out whether something is a false positive or an issue at hand. This whole interconnectivity of different systems into Trend Vision One, and its ability to help individualize an attack, is the thing I like the most. It is very good because reading logs and seeing an attack visualized are two different perspectives for a threat hunter. It really helps you understand what is going on.

With every such technology in an enterprise environment, as well as with most of the production systems, the reduction in the amount of time we spend investigating false positive alerts depends on how fast you finetune the system. You need to tell it which are the exceptions and not to alert you on it, and which ones it should alert you on. It is a balancing act in cybersecurity. For example, logins are used by attackers but also by your admin staff. If you totally put them in exemption, you can have a malicious login executing in your environment. You would be completely blind there because nothing would get alerted. In terms of false positives, the system is capturing a lot of data, and it is not the system's fault because it is seeing a lot of data. Sometimes, we have not classified the data. We are getting better at it. We are labeling and tagging the systems. We are fine-tuning it, and it has reduced a fair bit, but we still have a lot of work to do. It happens, but it is something we do behind the scenes. In terms of the day-to-day threat hunting and visibility, it categorizes them in Workbench, and that is what we look at first thing in the morning. We get to know what is happening and what we need to focus on. Once we see that there is a pattern repeating for some false positives and Workbench alerts are high and not true positive, we then figure out how to whitelist those systems. We now know that this is a known execution process. We know it is a known traffic or a known vendor that runs this application, and when it opens, it connects to these ports, for example. It is a bit of a balancing act. It changes dynamically.