VB.NET开发后台隐藏程序：检测并终止运行中的Injector程序

Alright, let's walk through building this VB.NET program that runs silently in the background, scans for any running Injector processes, and terminates them. I'll break this down into manageable parts with code examples and key considerations to make it work smoothly.

First, we need to ensure the program doesn't show up in the taskbar or have a visible window. If you're using a Windows Forms project, configure the main form with these settings:

• Set FormBorderStyle to None
• Set ShowInTaskbar to False
• Set WindowState to Minimized (though with no border, it won't be visible anyway)

For a more robust background solution, you could build a Windows Service, but that requires extra setup like installing the service and handling session isolation. For simplicity, we'll start with a hidden WinForms app first.

We'll use the System.Diagnostics.Process class to iterate over all running processes and target the Injector executable. Here's a helper method to handle this:

Imports System.Diagnostics

Private Sub KillInjectorProcesses()
    ' Replace "Injector" with the actual process name (case-insensitive check)
    Dim targetProcessName As String = "Injector".ToLower()
    
    For Each proc As Process In Process.GetProcesses()
        Try
            ' Check if the process name matches (ignore case to avoid misses)
            If proc.ProcessName.ToLower() = targetProcessName Then
                ' Attempt to terminate the process
                proc.Kill()
                proc.WaitForExit() ' Optional: Wait for full termination before moving on
                Debug.WriteLine($"Terminated Injector process with ID: {proc.Id}")
            End If
        Catch ex As Exception
            ' Handle common issues like access denied or process already exited
            Debug.WriteLine($"Failed to terminate process {proc.Id}: {ex.Message}")
        Finally
            proc.Dispose() ' Always dispose of Process objects to prevent memory leaks
        End Try
    Next
End Sub

Note: Some protected processes will require administrator privileges to terminate. We'll cover how to enforce that next.

To keep checking for the Injector process automatically, use a Timer control. Here's how to set it up:

1. Drag a Timer from the toolbox onto your form. Set its Enabled property to True and Interval to your preferred scan frequency (e.g., 5000 for 5 seconds).
2. Handle the Tick event to run the scanner:

Private Sub Timer1_Tick(sender As Object, e As EventArgs) Handles Timer1.Tick
    ' Run the scanner every interval
    KillInjectorProcesses()
End Sub

To ensure your program can terminate protected processes, you need to run it with admin rights. Here's how to enforce this:

1. Right-click your VB.NET project → Add → New Item → Select "Application Manifest File".
2. Open the manifest and find the <requestedExecutionLevel> element. Update it to:

<requestedExecutionLevel level="requireAdministrator" uiAccess="false" />

This will prompt the user for admin credentials when launching the program.

• Double-Check the Process Name: Confirm the exact name of the Injector process using Task Manager's "Details" tab (it might not be "Injector.exe").
• Ethics & Legality: Only use this program on systems you own or have explicit permission to manage. Terminating processes without authorization is illegal and unethical.
• Error Logging: Instead of just writing to Debug, consider logging failures and terminated processes to a file for later review.
• Stealth Considerations: If you want even more stealth, you can hide the process from Task Manager, but this is advanced and may trigger antivirus alerts. Proceed with caution.

Putting it all together, your main form code would look like this:

Imports System.Diagnostics

Public Class Form1
    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        ' Hide the form immediately on launch
        Me.Hide()
        ' Configure and start the scanner timer
        Timer1.Interval = 5000 ' Scan every 5 seconds
        Timer1.Enabled = True
    End Sub

    Private Sub Timer1_Tick(sender As Object, e As EventArgs) Handles Timer1.Tick
        KillInjectorProcesses()
    End Sub

    Private Sub KillInjectorProcesses()
        Dim targetProcessName As String = "Injector".ToLower()
        
        For Each proc As Process In Process.GetProcesses()
            Try
                If proc.ProcessName.ToLower() = targetProcessName Then
                    proc.Kill()
                    proc.WaitForExit()
                    ' Optional: Log to a file
                    ' My.Computer.FileSystem.WriteAllText("C:\Logs\TerminatedProcesses.txt", $"Terminated {proc.Id} at {DateTime.Now}{Environment.NewLine}", True)
                End If
            Catch ex As Exception
                ' Log errors to a file
                ' My.Computer.FileSystem.WriteAllText("C:\Logs\Errors.txt", $"Error: {ex.Message} at {DateTime.Now}{Environment.NewLine}", True)
            Finally
                proc.Dispose()
            End Try
        Next
    End Sub
End Class

内容的提问来源于stack exchange，提问作者khaled atef