CODEWITHSUNDEEP
c++filedriverhide
Marcel Mar
Marcel Mar

Reputation: 43

"Hide" files in executables (C++)

Is there any way to kind of "hide" things in executables? For example adding dll's to your project. These files such as a driver, a dll and another executable should somehow get extracted, be used and deleted after that. Im using VS2015 and I try to hide the files in a x86 c++ application.

Upvotes: 0

Views: 1284

Answers (1)

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Reputation: 572

Seems like you could use resources. FindResource is the main function for extracting the file from resources. I assume you want to insert a resource by hand, not programatically. And so:

Inserting binary resource in c++: In your .rc file of the project:

IDR_BIN             BIN      DISCARDABLE     "file.exe"

Extracting binary resource in c++:

bool ExtractBinResource( std::string strCustomResName, int nResourceId, std::wstring strOutputName )
{
    HGLOBAL hResourceLoaded = NULL;     // handle to loaded resource 
    HRSRC hRes = NULL;                      // handle/ptr. to res. info. 
    char *lpResLock = NULL;             // pointer to resource data 
    DWORD dwSizeRes;

    // find location of the resource and get handle to it
    hRes = FindResourceA( NULL, MAKEINTRESOURCEA(nResourceId), strCustomResName.c_str() );
    if (hRes == NULL) return false;
    // loads the specified resource into global memory. 
    hResourceLoaded = LoadResource( NULL, hRes ); 
    if (hResourceLoaded == NULL) return false;
    // get a pointer to the loaded resource!
    lpResLock = (char*)LockResource( hResourceLoaded ); 
    if (lpResLock == NULL) return false;
    // determine the size of the resource, so we know how much to write out to file!  
    dwSizeRes = SizeofResource( NULL, hRes );

    std::ofstream outputFile(strOutputName.c_str(), std::ios::binary);

    outputFile.write((const char*)lpResLock, dwSizeRes);
    outputFile.close();
    return true;
}

Where in this case strCustomResName is "BIN" and nResourceId is what number you chose to #define IDR_BIN

If by 'hide' you mean that nobody could see/understand what's in your executable then you should also encrypt your file.

Upvotes: 1

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