shellCode 公式

 

E8  E9后的地址公式如下:

X = 真正要跳转的地址 - E8这一条指令的下一行指令
等价于
X = 真正要跳转的地址 - (eip + 5)

E8 X
E9 X

BYTE ShellCode[]={0x6A,0x00,0x6A,0x00,0x6A,0x00,0x6A,0x00,0xE8,0x00,0x00,0x00,0x00,0xE9,0x00,0x00,0x00,0x00};

//pImageBuf 我们在堆上分配的,首地址, 即为内存的首地址
//ImageBase 为内存中运行时的首地址
void *pAddAddress = (void *)((DWORD)pImageBuf + pISH->VirtualAddress + pISH->Misc.VirtualSize);
memcpy(pAddAddress,pShellCode,dwShellCodeSize);
//进行地址修正
HMODULE  hMod = LoadLibrary("User32.dll");
//我们要执行的函数
*(DWORD *)((BYTE*)pAddAddress + 9) = (DWORD)GetProcAddress(hMod,"MessageBoxA") -     
((DWORD)ImageBase+pISH->VirtualAddress + pISH->Misc.VirtualSize+8) - 5;
//跳到原来程序要执行的位置
*(DWORD *)((BYTE*)pAddAddress + 14) = ImageBase+AddressOfEntryPoint - ((DWORD)ImageBase+pISH->VirtualAddress + pISH->Misc.VirtualSize+13) - 5;
//重新修改入口地址, 首先让程序去执行我们的函数;
 pINGS->OptionalHeader.AddressOfEntryPoint = pISH->VirtualAddress + pISH->Misc.VirtualSize;

   注意:ShellCode  是放在pImagebuff中的, 但是E8  E9后面的地址是imagebase中的地址

 

Shellcode Helper v1.62 Coded by TeLeMan (c) 2008-2013 Usage: schelper.exe [options] Options: -i [input file] input file (Default: stdin) -o [output file] output file (Default: stdout) -s input file format (Default: Auto-Detection) -sb input file format is Binary -sp the input file format's parameters -d output file format (Default: C format) -db output file format is Binary -dp the output file format's parameters -search get the start offset by the pattern: e.g. PK\x03\x04 -soff fix the match offset after searching (Default: 0) -off convert the input file from the offset (Default: 0) -len convert the input file with the length (Default: 0 - MAX) -en [encoder] encode shellcode (Default: XorDword) -de [encoder] decode shellcode (Default: Auto-Detection) -ex exclude characters: e.g. 0x00,0x01-0x1F,0xFF (Default: 0x00) -in incude characters only -ep the encoder's parameters -t [pid] execute or inject shellcode into process for testing -td [pid] execute or inject shellcode into process for debugging -stack put shellcode into stack and execute it (ESP is the shellcode start) -noinfo display no normal messages except error messages Available formats: 0 - C 1 - C(HexArray) 2 - Perl 3 - Python 4 - Ruby 5 - JavaScript(Escape) 6 - VBScript(Escape) 7 - Pascal 8 - MASM(Data) 9 - HexDump 10 - BitString 11 - HexString 12 - HexArray(C like) 13 - Base64 14 - Binary 15 - HexString(C like) 16 - HexString(Escape) 17 - HexString(JavaScript,UNICODE) 18 - URI(ISO-8859-1) 19 - XML(PCDATA) 20 - BigNumber 21 - BigNumber(Hex) 22 - BigNumber(BaseX) 23 - FloatPoint 24 - UnixTimestamp 25 - GUID 26 - MASM(ASM) 27 - NASM 28 - YASM(ASM) 29 - FASM(ASM) 30 - JWASM(ASM) 31 - POASM(ASM) 32 - GOASM(ASM) 33 - GNU ASM Available encoders:
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