In the latest reminder that even advanced cybersecurity tools are vulnerable, researchers have discovered a new technique that allows threat actors to bypass SentinelOne, one of the most widely used endpoint detection and response (EDR) solutions.
As reported by InfoSecurity Magazine (source article), security researcher Aleksandar Milenkoski of MDSec found a way to disable SentinelOne’s protections using a method that’s both stealthy and effective. The technique exploits the SentinelOne agent’s own logging framework, Log4j, by injecting a rogue library into the agent’s process tree. The result? An attacker can disarm the EDR tool without triggering an alert—leaving systems exposed and blind to malicious activity.
This isn’t just a clever trick. It’s a blueprint for how attackers can gain the upper hand, even against top-tier cybersecurity tools.
The Problem with "Detect and Respond"
Solutions like SentinelOne rely heavily on the detect-and-respond model—a reactive strategy that assumes threats will be spotted after they have already begun executing. The problem? As this latest bypass technique shows, attackers are getting better at staying undetected while neutralizing defenses.
This isn’t a one-off issue. We’ve seen a growing number of cases where attackers specifically target EDR and antivirus tools for takedown—disabling them first, then launching ransomware or stealing data without interference. Once your detection tool is blind, your business is wide open.
And it’s not just SentinelOne. Similar vulnerabilities have been uncovered in other major EDR platforms, from CrowdStrike to Microsoft Defender for Endpoint. It’s a systemic weakness in the way these tools are designed: they watch and react, but they don’t stop bad actions before they start.
The Solution: Isolation and Containment
There is a better way. Rather than trying to detect and respond to malicious behavior after it starts, AppGuard takes a proactive approach: it isolates and contains potential threats before they can execute.
AppGuard is a proven endpoint protection solution with a 10-year track record in defending high-security environments like federal agencies, defense contractors, and critical infrastructure. Now available for commercial use, it offers businesses a way to stop attacks even if malware is brand new, fileless, or bypasses detection tools.
How does it work? AppGuard enforces zero-trust execution control at the kernel level. That means it prevents unauthorized applications and processes—like the rogue library in this SentinelOne bypass scenario—from executing or altering protected assets. Even if malware gets on a device, AppGuard prevents it from causing harm.
No alerts. No chasing false positives. Just prevention.
Real Protection, Not Just Visibility
The goal of cybersecurity shouldn’t just be to know you’ve been attacked. It should be to prevent the attack from succeeding in the first place. With today's threats, especially those that include built-in EDR bypasses, relying on a “see and respond” approach just isn’t enough.
EDR tools will continue to be bypassed. Threat actors are innovating faster than detection engines can keep up. It’s time to change the game.
Make the Shift to AppGuard
This latest SentinelOne bypass technique is a wake-up call for all businesses: if your endpoint protection relies solely on detection and response, you're at risk.
At CHIPS, we believe in a better approach—one that doesn’t wait for a breach to start before acting. That’s why we advocate for AppGuard, a solution built on isolation and containment, not reaction.
If you're ready to move from reactive defense to true prevention, we’re here to help. Let’s talk about how AppGuard can protect your business before attackers have a chance to strike.
👉 Contact CHIPS today to learn how AppGuard can stop threats cold—no matter how stealthy they are.
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