there are quite a lot of shellcode tutorials on the internet (or in bookstores)... This shellcoder handbook is good... http://www.amazon.com/Shellcoders-Handb

there are quite a lot of shellcode tutorials on the internet (or in bookstores)... This shellcoder handbook is good... http://www.amazon.com/Shellcoders-Handbook-Discovering-Exploiting-Security/dp/047008023X/ http://www.amazon.com/Shellcoders-Handbook-Discovering-Explo... And articles such as this one by steve hanna http://www.vividmachines.com/shellcode/shellcode.html http://www.vividmachines.com/shellcode/shellcode.html and this one by Aleph One on phrack, http://phrack.org/issues/49/14.html http://phrack.org/issues/49/14.html (by the way, many articles on phrack are really good) Some more recent versions of smashing the stack are, http://www.mgraziano.info/docs/stsi2010.pdf http://www.mgraziano.info/docs/stsi2010.pdf https://paulmakowski.wordpress.com/2011/01/25/smashing-the-stack-in-2011/ https://paulmakowski.wordpress.com/2011/01/25/smashing-the-s... also check out the ezines by 29A -- although they are old, but you know, some good stuff are still really good today... just do a little search...there are tons of articles out there on this topic...