By Joseph Kong
ISBN-10: 1593271425
ISBN-13: 9781593271428
Even though rootkits have a reasonably destructive picture, they are often used for either stable and evil. Designing BSD Rootkits hands you with the information you must write offensive rootkits, to guard opposed to malicious ones, and to discover the FreeBSD kernel and working procedure within the technique.
</br> prepared as an instructional, Designing BSD Rootkits will train you the basics of programming and constructing rootkits below the FreeBSD working approach. writer Joseph Kong's objective is to make you smarter, to not educate you the way to jot down exploits or release assaults. You'll how one can continue root entry lengthy after getting access to a working laptop or computer and the way to hack FreeBSD.
</br> Kongs liberal use of examples assumes no past kernel-hacking event yet doesn't water down the data. All code is punctiliously defined and analyzed, and every bankruptcy includes not less than one real-world program.
</br> incorporated:
* the basics of FreeBSD kernel module programming * utilizing name hooking to subvert the FreeBSD kernel * without delay manipulating the gadgets the kernel depends on for its inner record-keeping * Patching kernel code resident in major reminiscence; in different phrases, changing the kernel's common sense whereas it's nonetheless working * tips on how to safeguard opposed to the assaults defined
</br> Hack the FreeBSD kernel for your self!
Read or Download Designing BSD Rootkits: An Introduction to Kernel Hacking PDF
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Extra info for Designing BSD Rootkits: An Introduction to Kernel Hacking
Sample text
Static int process_hiding(struct thread *td, void *syscall_args) { struct process_hiding_args *uap; uap = (struct process_hiding_args *)syscall_args; struct proc *p; sx_xlock(&allproc_lock); /* Iterate through the allproc list. p->p_vmspace || (p->p_flag & P_WEXIT)) { PROC_UNLOCK(p); D ir ect K er ne l O b jec t M an ip ula t ion 43 continue; } /* Do we want to hide this process? */ if (strncmp(p->p_comm, uap->p_comm, MAXCOMLEN) == 0) LIST_REMOVE(p, p_list); PROC_UNLOCK(p); } sx_xunlock(&allproc_lock); return(0); } /* The sysent for the new system call.
Swapped out or not faulted in yet). That’s why it’s just an example and not a real system call. 6 Character Device Modules Character device modules are KLDs that create or install a character device. In FreeBSD, a character device is the interface for accessing a specific device within the kernel. For example, data is read from and written to the system console via the character device /dev/console. NOTE In Chapter 4 you’ll be writing rootkits that hack the existing character devices on the system.
The -e option), its syscall function, and the fact that you know your system call’s offset value, you can quickly test any system call module. One thing to keep in mind is that you cannot use string literals with Perl’s syscall function, which is why I use a variable ($str) to pass the string to sc_example. 5 Kernel/User Space Transitions I’ll now describe a set of core functions that you can use from kernel space to copy, manipulate, and overwrite the data stored in user space. We’ll put these functions to much use throughout this book.
Designing BSD Rootkits: An Introduction to Kernel Hacking by Joseph Kong
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