Sandbox Evasion

Sleep

/**
* Sleep for a certain amounts of seconds.
*/
private void Sleep(int seconds)
{
    Thread.Sleep(seconds * 1000);
}

Mouse is moving

using System.Runtime.InteropServices;

// ...

[DllImport("user32.dll")]
static extern bool GetCursorPos(out Point lpPoint);

public Point GetMousePosition()
{
    GetCursorPos(out Point lpPoint);
    return lpPoint;
}

[StructLayout(LayoutKind.Sequential)]
public struct Point
{
    public int X;
    public int Y;
}

/**
* Exit the program if the position of the mouse has not changed in 30 seconds.
*/
public void CheckMouseIsMoving()
{
    Point mousePosition = this.GetMousePosition();
    this.Sleep(30);
    Point newMousePosition = this.GetMousePosition();

    if (mousePosition.X == newMousePosition.X &&
        mousePosition.Y == newMousePosition.Y) Environment.Exit(1337);
}

Numbers of CPUs

/**
* Exit the program if the number of CPU is below or equals to 2.
*/
public void CheckCPUCount()
{
    if (Environment.ProcessorCount <= 2) Environment.Exit(1337);
}

Presence of Debugger

using System.Diagnostics;

// ...

/**
* Exit the program if a debugger is attached to the process.
*/
public void CheckDebugger()
{
    if (Debugger.IsAttached) Environment.Exit(1337);
}

Uptime

/**
*  Exit the program if the uptime is less than 15 minutes.
*/
public void CheckUptime()
{
    int uptime = (Environment.TickCount & Int32.MaxValue) / 1000;
    if (uptime / 60 < 15) Environment.Exit(1337);
}