Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects attempts to unload, disable, or remove kernel drivers, which could indicate a rootkit or other malicious activity trying to hide its presence or impair system defenses. The rule specifically looks for process creation events (EventID 4688) where the command line contains keywords related to driver manipulation ('unload driver', 'disable driver', 'remove driver') and also references kernel components ('.sys', 'kernel').
An unprivileged user can gain root access on major Linux distributions by exploiting CVE-2026-31431, a deterministic 4-byte page cache write bug in the authencesn cryptographic template.
The 'Copy Fail' vulnerability (CVE-2026-31431) is a critical logic flaw in the Linux kernel's crypto subsystem disclosed by Xint Code. Unlike previous high-profile kernel exploits that relied on race conditions, Copy Fail is a straight-line logic bug that allows an unprivileged local user to perform a controlled 4-byte write into the page cache of any readable file. This enables an attacker to modify the in-memory version of setuid binaries (like /usr/bin/su) to execute arbitrary shellcode as root without changing the file on disk.
Vulnerability affects Linux Kernel version starting 4.14 before 6.18.22.
The 'Copy Fail' vulnerability (CVE-2026-31431) is a critical logic flaw in the Linux kernel's crypto subsystem disclosed by Xint Code. Unlike previous high-profile kernel exploits that relied on race conditions, Copy Fail is a straight-line logic bug that allows an unprivileged local user to perform a controlled 4-byte write into the page cache of any readable file. This enables an attacker to modify the in-memory version of setuid binaries (like /usr/bin/su) to execute arbitrary shellcode as root without changing the file on disk.
Vulnerability affects Linux Kernel version starting 4.14 before 6.18.22.
Detects attempts to unload, disable, or remove kernel drivers, which could indicate a rootkit or other malicious activity trying to hide its presence or impair system defenses. The rule specifically looks for process creation events (EventID 4688) where the command line contains keywords related to driver manipulation ('unload driver', 'disable driver', 'remove driver') and also references kernel components ('.sys', 'kernel').
Detects loading of kernel modules for deep system persistence
KQL Query from file: Threat Hunting BYOVD Scenarios
The following analytic detects suspicious use of the `modprobe` command to unload kernel modules, which may indicate an attempt to disable critical system components or evade detection. The `modprobe` utility manages kernel modules, and unauthorized unloading of modules can disrupt system security features, remove logging capabilities, or conceal malicious activities. By monitoring for unusual or unauthorized `modprobe` operations involving module unloading, this analytic helps identify potential tampering with kernel functionality, enabling security teams to investigate and address possible threats to system integrity.
Detects the use of dtrace.exe to perform a kernel dump on Windows systems. This activity is suspicious as dtrace.exe is a legitimate debugging tool that can be abused for system information discovery or credential access by dumping kernel memory.
