static void clearDllBit(byte[] peImageData)
{
var mainPeImage = new PeImage(peImageData);
uint characteristicsOffset = mainPeImage.FileHeaderOffset + 18;
ushort characteristics = mainPeImage.offsetReadUInt16(characteristicsOffset);
characteristics &= 0xDFFF;
characteristics |= 2;
mainPeImage.offsetWriteUInt16(characteristicsOffset, characteristics);
}