This document and video will demonstrate how the CrowdStrike solution empowers the Security Operations Center to detect and understand events quickly so that they can get proactive and take action to protect the organization.
CrowdStrike’s EDR solution provides unparalleled visibility into local system events. While existing engines detect a great deal of malicious behavior, the adversary is always looking for new ways to gain access. Falcon OverWatch is there 24×7 to provide human insight and analyze events in search of potentially malicious activity that was not previously detected. The email below is an example of an OverWatch alert of potentially malicious activity.
The link in the email takes us directly to the event details. There, we see the detailed visibility that Falcon Insight offers. In addition to the process tree, we see the MITRE tactic & technique as well as the objective and severity.
Falcon Insight also provides response actions including remote remediation and network containment. Network Containment helps to prevent lateral movement or external communications during your investigation.
Once the incident has been identified and contained, we need to understand more about what has taken place. Using Falcon Discover, we can quickly understand if the user’s account might have been compromised. We can search on the username in question to track all login activity across all protected systems.
Similarly, Falcon Insight can help us understand if there has been network access to related domains or IP’s from other machines. This is especially useful to understand if this is part of a persistent or long term attack where other machines might have been previously impacted.
For activity that is attributed to a specific adversary, Falcon Intel’s actor profiles provide helpful information based on known behaviors of the actor. Things like commonly targeted industries, Command and Control domains, and frequently leverages vulnerabilities can help you get proactive and take steps to protect your environment from future attacks.
Falcon Spotlight gives you the ability to quickly assess the environmental status on specific vulnerabilities. Having this real time information is invaluable when you are responding to a threat or taking proactive action against known attackers. Sharing it with the patch management team can help them prioritize patch remediation plans.
CrowdStrike’s proactive threat hunting, EDR, cyber threat intelligence, IT hygiene, and vulnerability assessment tools work together to improve incident response and remediation times. Through fast detection, clear understanding and actionable measures, the Security Operations Team will be more effective and empowered to improve the company’s overall security posture.
How to Contain an Infected System
Hi, there. My name’s Peter Ingebrigtsen. And today, we’ve logged into the falcon.crowdstrike.com, or the Falcon User Interface.
And what we’re going to do is take a look at some of our systems and recognize that some of them are either currently under attack or recently been under attack, and may have been compromised. And we’d like to contain that system until we can further get to it, get our hands on it, and get a little bit more information out of it, or just prevent it from doing any more damage than it’s already done.
In order to do that, you need to be on your Detections app. You can do that by going to the radar here on the left-hand side. If you’re not already, or if your user interface doesn’t open that when you first log in, head there. And then just select the Recent Detections.
When that opens, you’ll notice that you can filter by any number of criteria, but we’re looking at some of the more recent events or situations that are going on. And you’ll notice that the same single machine has noticed a lot of different scenarios with privilege escalation or web exploits. And these severities are high to critical.
And we’d like to log in there, maybe do a little something, take a little closer look, and see if there’s something we should do. Obviously, we should do something. And as we start to dig through here, we see that there’s a lot of detection patterns, whether that be known malware, credential theft, or web exploits. We can see in the process tree a lot of different commands that were issued that look at that privilege escalation that we noticed earlier– or start to set that up.
So, we know that there’s something bad going on, and we’d like to take action right away. So, what we want to do is network contain this machine. But what I want to show you, as well, is that as we do this– I’m going to go to the machine itself. And I’d like to start a continuous ping so that you can watch the behavior and how long it takes to respond to this network containment.
Now, while we contain this– or take this machine off the network– we don’t kill the connection to the CrowdStrike Cloud. So, that as we get our hands on it– we clean it up, we feel comfortable putting it back on to the network– we can still operate or control that machine through the user interface that we have here.
The other thing I’d like to do is start a large download, so that we initiate with a single TCP connection– and there happens to be one in process– as opposed to the ping, where there may be multiple TCP resets or individual TCP threads going every time. So that you can see that as we contain this machine, it literally just knocks it off the network.
Forgive my screen, but I’ve changed the resolution for YouTube and for appearance purposes.
But as I come in here– and this will be right at the middle of the screen– this actually says Device Actions. And I’d like to contain it.
Now, as we do that, we have some options to make some notes. Contained by Peter. Multiple threats observed. Whatever notes you’d like to make– and then select Contain.
Now, the second we do this, on the left-hand side, you’ll see how quickly it takes for that to respond. So, immediately, almost in real time, you see a network failure on the download, and the ping test– or the continuous ping fail. So, we can close that.
Now, let’s say we’re a couple days later, this machine’s cleaned up, ready to go, and be put back in the network. You can go ahead and lift the network containment, again, from the user interface. We still have that connection to the machine, even though all the other network connections have been terminated.
So, as we do that, all good. Uncontain. And you’ll notice that almost immediately that ping starts to fire right back up again.
So, network containment is a powerful tool that we can use if we see something immediately taking action or if we see something recently in the past, and we’d like to get that machine off the network– almost quarantine it– so that it can’t do any more damage.
So, this has been network containment of network devices in the Falcon Sensor User Interface platform. Thanks again for watching.