Download Designing BSD Rootkits: An Introduction to Kernel Hacking by Joseph Kong PDF

By Joseph Kong

Even though rootkits have a reasonably destructive photograph, they are often used for either reliable and evil. Designing BSD Rootkits palms you with the information you must write offensive rootkits, to protect opposed to malicious ones, and to discover the FreeBSD kernel and working approach within the procedure.
</br> prepared as an academic, Designing BSD Rootkits will train you the basics of programming and constructing rootkits less than the FreeBSD working process. writer Joseph Kong's aim is to make you smarter, to not train you ways to write down exploits or release assaults. You'll how to 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 adventure yet doesn't water down the knowledge. All code is carefully defined and analyzed, and every bankruptcy comprises no less than one real-world software.
</br> integrated:
* the basics of FreeBSD kernel module programming * utilizing name hooking to subvert the FreeBSD kernel * without delay manipulating the gadgets the kernel is dependent upon 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 operating * the way to protect opposed to the assaults defined
</br> Hack the FreeBSD kernel for your self!

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NOTE The macros for manipulating singly-linked lists, singly-linked tail queues, and doublylinked tail queues are not discussed because they are in effect identical to the ones shown below. For details on the use of these macros, see the queue(3) manual page. 1 The LIST_HEAD Macro A doubly-linked list is headed by a structure defined by the LIST_HEAD macro. This structure contains a single pointer to the first element on the list. The elements are doubly-linked so that an arbitrary element can be removed without traversing the list.

Furthermore, if one thread holds an exclusive lock, no other threads may hold a shared lock. A thread acquires a shared or exclusive lock by calling the sx_slock or sx_xlock functions, respectively. 4 The sx_sunlock and sx_xunlock Functions To release a shared or exclusive lock, call the sx_sunlock or sx_xunlock functions, respectively. 3 For more on shared/exclusive locks, see the sx(9) manual page. Hiding a Running Process Now, equipped with the macros and functions from the previous sections, I’ll detail how to hide a running process using DKOM.

Ko are technically linker files, and xpt, probe, cam, and hello are the actual modules. This means that the arguments(s) for kldload(8) and kldunload(8) are actually linker files, not modules, and that for every module loaded into the kernel, there is an accompanying linker file. 8 For our purposes, think of a linker file as an usher (or escort) for one or more kernel modules, guiding them into kernel space. Concluding Remarks This chapter has been a whirlwind tour of FreeBSD kernel-module programming.

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