AntiDebuggerSample.cpp

/**
 * An Anti-Reverse Engineering Guide, Joshua Tully
 * https://www.codeproject.com/Articles/30815/An-Anti-Reverse-Engineering-Guide
 * You can find all methods of anti-debugging here: https://gist.github.com/igorsegallafa/3dd15c67e7091e9734a417fe1079129b
 */

bool FindDebugger1::HasDebugger()
{
    __try { __asm INT 0x2D }
    __except (EXCEPTION_EXECUTE_HANDLER){ return false; }

    return true;
}

bool FindDebugger2::HasDebugger()
{
    __try { __asm INT 0x03 }
    __except (EXCEPTION_EXECUTE_HANDLER){ return false; }

    return true;
}

bool FindDebugger3::HasDebugger()
{
    CONTEXT ctx = {0};
    ctx.ContextFlags = CONTEXT_DEBUG_REGISTERS;
    
    auto hThread = GetCurrentThread();
    
    if( GetThreadContext( hThread, &ctx ) == 0 )
    {
        return false;
    }
    
    //Debugger Found
    if( ctx.Dr0 != 0 || ctx.Dr1 != 0 || ctx.Dr2 != 0 || ctx.Dr3 != 0 )
        return true;
  
  return false;
}