Checking Screen Resolution

Created the Monday 11 March 2019. Updated 3 weeks ago.

Sandbox environments typically do not function as standard user workspaces; as a result, they often maintain a minimum screen resolution of 800x600 or even lower. In practice, users seldom work with such limited screen dimensions. Malware may leverage this information, detecting the screen resolution to ascertain whether it is operating on a genuine user machine or within a sandbox environment.

Technique Identifiers

U1315 B0007.006

Technique Tags

sandbox environments standard user workspaces screen resolution 800x600 malware detection user machine

Code Snippets

#include "wtypes.h"
#include <iostream>
using namespace std;

/*
1024x768 can be used for automated Sandbox
800x600 can be used for automated Sandbox
640x480 can be used for automated Sandbox
1024x697
1280x800
1280x960
1680x1050
1916x1066
*/

void GetResolution(int& horiz, int& verti)
{
   RECT desktop;
   const HWND hDesktop = GetDesktopWindow();
   GetWindowRect(hDesktop, &desktop);
   horiz = desktop.right;
   verti = desktop.bottom;
}

int main()
{
   int horiz = 0;
   int verti = 0;
   GetResolution(horiz, verti);

   if(horiz < 1024)
   {
      cout << "[!] Looks like you run in a sandbox!"<< '\n';
   }

   cout << "[+] Screen resolution: "<< horiz << "x" << verti << '\n';
   return 0;
}

package main

import (
	"fmt"
	"syscall"
	"time"
)

var (
	user32               = syscall.NewLazyDLL("user32.dll")
	procGetSystemMetrics = user32.NewProc("GetSystemMetrics")
)

func getScreenResolution() {
	indexX := uintptr(0)
	indexY := uintptr(1)
	x, _, _ := procGetSystemMetrics.Call(indexX)
	y, _, _ := procGetSystemMetrics.Call(indexY)
	fmt.Println("X = ", x, " Y = ", y)
	// Modify the screen size as you want !
	if x < 1024 || y < 768 {
		fmt.Println("Sandbox Detected !")
	}
}

func main() {
	getScreenResolution()
	time.Sleep(time.Second * 10)
}
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