Attacking FreeBSD with Kernel Modules - The System Call Approach. System calls can be backdoored on FreeBSD much like they can on linux, and most linux kernel modules can easily be ported to FreeBSD. Includes information on intercepting system calls, filesystem related hacks, hiding files and contests, process related hacks, file execution redirection, tty hijacking, and module hiding.
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Hacking Linux Loadable Kernel Modules - The definitive guide to hacking Linux Loadable Kernel Modules for hackers, virus coders and system administrators. Covers the Basics, hacking modules for Fun & Profit, Solutions (for admins), Some Better Ideas (for hackers), and plenty of source code, including: LKM Infection by Stealthf0rk/SVAT, Heroin - the classic one by Runar Jensen, LKM Hider / Socket Backdoor by plaguez, LKM TTY hijacking by halflife, AFHRM - the monitor tool by Michal Zalewski, CHROOT module trick by FLoW/HISPAHACK, Kernel Memory Patching by ?, Module insertion without native support by Silvio Cesare.
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