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

By Joseph Kong

ISBN-10: 1593271425

ISBN-13: 9781593271428

Notwithstanding rootkits have a reasonably damaging photo, they are often used for either stable and evil. Designing BSD Rootkits hands you with the information you must write offensive rootkits, to protect opposed to malicious ones, and to discover the FreeBSD kernel and working process within the technique.
</br> equipped as an academic, Designing BSD Rootkits will train you the basics of programming and constructing rootkits below the FreeBSD working procedure. writer Joseph Kong's objective is to make you smarter, to not educate you ways to put in writing exploits or release assaults. You'll the right way to hold root entry lengthy after having access to a working laptop or computer and the way to hack FreeBSD.
</br> Kongs liberal use of examples assumes no earlier kernel-hacking event yet doesn't water down the data. All code is carefully defined and analyzed, and every bankruptcy comprises not less than one real-world program.
</br> incorporated:
* the basics of FreeBSD kernel module programming * utilizing name hooking to subvert the FreeBSD kernel * at once manipulating the gadgets the kernel is determined by 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 * find out how to guard opposed to the assaults defined
</br> Hack the FreeBSD kernel for your self!

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Extra info for Designing BSD Rootkits: An Introduction to Kernel Hacking

Example text

Static int load(struct module *module, int cmd, void *arg) { int error = 0; switch (cmd) { case MOD_LOAD: /* Replace icmp_input with icmp_input_hook. pr_input = icmp_input_hook; break; case MOD_UNLOAD: /* Change everything back to normal. c In Listing 2-3 the function icmp_input_hook first sets hlen to the received ICMP message’s IP header length (off). Next, the location of the ICMP message within m is determined; keep in mind that an ICMP message is transmitted within an IP datagram, which is why m_data is increased by hlen.

6 Hooking a Communication Protocol Listing 2-3 is an example communication protocol hook designed to output a debug message whenever an Internet Control Message Protocol (ICMP) redirect for Type of Service and Host message containing the phrase Shiny is received. NOTE 32 C ha pt er 2 An ICMP redirect for Type of Service and Host message contains a type field of 5 and a code field of 3. " extern struct protosw inetsw[]; pr_input_t icmp_input_hook; /* icmp_input hook. */ void icmp_input_hook(struct mbuf *m, int off) { struct icmp *icp; int hlen = off; /* Locate the ICMP message within m.

H> header. D ir ect K er ne l O b jec t M an ip ula t ion 41 enum { PRS_NEW = 0, PRS_NORMAL, PRS_ZOMBIE } p_state; This field represents the current process state, where PRS_NEW identifies a newly born but incompletely initialized process, PRS_NORMAL identifies a “live” process, and PRS_ZOMBIE identifies a zombie process. pid_t p_pid; This is the process identifier (PID), which is a 32-bit integer value. 2). This field is referenced during insertion, removal, and traversal of pidhashtbl. struct mtx p_mtx; This is the resource access control associated with the proc structure.

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

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