Kernel Rootkit Module Delivered as LKM
This rule detects the delivery of a kernel rootkit module, specifically a Linux Kernel Module (LKM) or a Windows system file, over HTTP. It looks for HTTP responses where the URI ends with '.ko' (Kernel Object for Linux) or '.sys' (system file for Windows) and the file data contains the 'ELF' magic bytes, indicating an Executable and Linkable Format file, which is common for Linux executables and modules. This combination suggests an attempt to deliver a malicious kernel module.
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