Endpoint security controls include the policies and technologies you have in place around devices in your environment. These endpoint device security controls cover which executables can run on your systems, who has access to what resources and information, how your devices get patched, and how anomalies get detected. No single security control will catch everything malicious that runs on your systems, but the right layers of endpoint controls can make it far less likely that a successful breach becomes a disastrous one.

Most modern attacks don't leverage zero-day exploits. Attackers use stolen credentials to access your network and then hunt for vulnerabilities to exploit. Perhaps they access a server missing a recent patch. Maybe they escalate privileges using an account without least privilege protections enabled. Or they exploit weaknesses in security controls themselves to gain initial access. Sometimes they use built-in tools to move laterally across your network, because those tools were already loaded on the endpoint and won't get flagged by antivirus.

Effective endpoint security starts with a layered approach, combining proactive measures like vulnerability management and least privilege with advanced detection capabilities to identify and respond to threats in real time.

Vulnerability management

Software weaknesses and misconfigurations are a known risk. Once a vulnerability is disclosed, attackers race to exploit it before businesses can remediate. Vulnerability management is a critical endpoint security measure, and it starts with a solid asset inventory. You need to know what assets you have, where weaknesses exist, and which exposures carry the most risk. From there, prioritize remediation based on severity. Patching is the core mechanism, but addressing misconfigurations is just as important.

The real barriers are grandfathered systems that can't be patched, business-critical applications that require testing before deployment, and remote or transient endpoints that aren't connected to your corporate network often enough to guarantee updates. For systems that can’t be remediated on a regular schedule, application control is a strong compensating control as restricting what can execute on those endpoints limits attacker options even when patches are out of reach.

A strong vulnerability management strategy strengthens your overall endpoint device security by making sure high-value assets are prioritized and compensating controls cover what can't be remediated..

Least privilege and user access controls

Least privilege is a cornerstone of endpoint security. Only your users should have access to your data and networks, and they should only hold the privileges necessary to perform their job. Preventing privilege escalation during attacks requires auditing local admin rights and making sure only authorized accounts have them. It also requires regularly reviewing service account permissions and applying role-based access controls wherever possible.

Applying least privilege also extends to what users can install and run on corporate devices. The reality is that IT and security teams need to find a balance between protecting endpoints and impacting user productivity, and getting that balance right is what makes least privilege one of the most sustainable endpoint controls to maintain long-term.

Application control

Application control defines what software is allowed to run on your endpoints, and blocks everything else. By whitelisting approved executables and preventing unauthorized applications from running, you eliminate an entire class of attack before it can execute.

This makes application control one of the most effective compensating controls available, especially for endpoints that can’t be patched on a regular schedule. A grandfathered system running only approved, known-good software is much harder to exploit than one with unrestricted execution.

The challenge is maintenance, however. Allowlists need ongoing management as software changes, and overly restrictive policies create friction for users and IT teams alike. The goal is a baseline that blocks malicious execution without becoming an operational burden.

Behavioral endpoint detection

Traditional signature-based antivirus just isn't enough. Attackers increasingly use living-off-the-land (LOTL) techniques, abusing legitimate tools like remote monitoring and management (RMM) tools, PowerShell, and Windows Management Instrumentation (WMI) to bypass traditional antivirus and blend in with normal activity.

Behavioral endpoint detection, available in some form on every next-generation EDR solution, monitors for suspicious behaviors: new processes running, files changing, strange network connections, and abnormal user activity. With behavioral detection, you can identify threats that don't necessarily resemble any known malware.

Credential protection

Credentials are a high-value target. If an attacker breaches your password file, they have authenticated into your network legitimately, which is much more difficult to detect and stop. Endpoint security measures that help limit credential exposure involve disabling credential caching if possible, preventing credential dumping tools like Mimikatz from accessing memory, requiring multi-factor authentication (MFA), and alerting on authentication irregularities.

Not storing credentials on endpoints helps prevent attackers from obtaining and retaining a foothold. However, you should also apply identity security protections at the network and application layers.

Device control

Device control lets you manage the connection of peripheral devices. USB drives and other removable media are one of the most common methods of introducing malware to your network or stealing sensitive data. Preventing users from attaching unauthorized devices is an easy and effective endpoint device security control.

Most endpoint security programs have weak points. You can't eliminate every potential vulnerability, but certain weaknesses appear consistently across organizations.

Policy exceptions

One of the biggest drivers of policy weakness is exceptions. When you first deploy a security policy, it's probably well-considered and covers your use cases. Over time, exceptions accumulate. An example: the accounting department needs admin rights to run a legacy application. Policy drift happens as these types of exceptions pile up and erode your endpoint controls.

Living-off-the-land tools

As mentioned earlier, attackers frequently use tools already installed on endpoints to move through networks. Because admins legitimately use these tools every day, security solutions often overlook them. Behavioral monitoring that detects malicious use of legitimate tools, and not just known malware, is essential to closing this gap.

No clear response plan

Detection is useless without response. Too many organizations invest time and money in endpoint security tools without defining what happens when an endpoint gets compromised. An incident response plan is critical to containing breaches. If you don't have one documented, make it your top priority.

Incomplete deployment

One internet-connected device without endpoint protection is all it takes for attackers to infiltrate your network. Full deployment across your entire environment is operationally difficult, but it's non-negotiable for an effective endpoint security program.

Start with visibility. Establish solid asset inventory and monitoring so you know which devices connect to your network and when. Once you have that foundation, layer on the right endpoint security measures based on the assets you've identified and the risks they represent.

User training should be used to supplement technical controls. Teaching employees to recognize phishing emails and use strong authentication can prevent attacks from reaching your endpoints. Huntress Managed Security Awareness Training (SAT) can help with that.

No single endpoint security control is sufficient to prevent a breach, and that's still true here. The most effective programs combine proactive, preventive controls with active detection and response. EDR alerts without a response plan behind them accomplish nothing.

Huntress Managed EDR helps you close critical gaps in your endpoint security program without hiring and staffing your own 24/7 SOC, giving you continuous monitoring and expert human analysis backed by our AI-assisted SOC team. Get a demo of the Huntress platform and see how Managed EDR closes the gaps in your endpoint security program.