SC DLL Injector C# Source System Internal

SC DLL Injector C# Source System Internal

   Source Code:

//The_Undead : Rhys M.

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Threading;

namespace DLLInjector1
{

public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

[DllImport("kernel32")]
public static extern IntPtr CreateRemoteThread(
IntPtr hProcess,
IntPtr lpThreadAttributes,
uint dwStackSize,
UIntPtr lpStartAddress, // raw Pointer into remote process
IntPtr lpParameter,
uint dwCreationFlags,
out IntPtr lpThreadId
);

[DllImport("kernel32.dll")]
public static extern IntPtr OpenProcess(
UInt32 dwDesiredAccess,
Int32 bInheritHandle,
Int32 dwProcessId
);

[DllImport("kernel32.dll")]
public static extern Int32 CloseHandle(
IntPtr hObject
);

[DllImport("kernel32.dll", SetLastError = true, ExactSpelling = true)]
static extern bool VirtualFreeEx(
IntPtr hProcess,
IntPtr lpAddress,
UIntPtr dwSize,
uint dwFreeType
);

[DllImport("kernel32.dll", CharSet = CharSet.Ansi, ExactSpelling = true)]
public static extern UIntPtr GetProcAddress(
IntPtr hModule,
string procName
);

[DllImport("kernel32.dll", SetLastError = true, ExactSpelling = true)]
static extern IntPtr VirtualAllocEx(
IntPtr hProcess,
IntPtr lpAddress,
uint dwSize,
uint flAllocationType,
uint flProtect
);

[DllImport("kernel32.dll")]
static extern bool WriteProcessMemory(
IntPtr hProcess,
IntPtr lpBaseAddress,
string lpBuffer,
UIntPtr nSize,
out IntPtr lpNumberOfBytesWritten
);

[DllImport("kernel32.dll", CharSet = CharSet.Auto)]
public static extern IntPtr GetModuleHandle(
string lpModuleName
);

[DllImport("kernel32", SetLastError = true, ExactSpelling = true)]
internal static extern Int32 WaitForSingleObject(
IntPtr handle,
Int32 milliseconds
);

public Int32 GetProcessId(String proc)
{
Process[] ProcList;
ProcList = Process.GetProcessesByName(proc);
return ProcList[0].Id;
}

public void InjectDLL(IntPtr hProcess, String strDLLName)
{
IntPtr bytesout;

// Length of string containing the DLL file name +1 byte padding
Int32 LenWrite = strDLLName.Length + 1;
// Allocate memory within the virtual address space of the target process
IntPtr AllocMem = (IntPtr)VirtualAllocEx(hProcess, (IntPtr)null, (uint)LenWrite, 0x1000, 0x40); //allocation pour WriteProcessMemory

// Write DLL file name to allocated memory in target process
WriteProcessMemory(hProcess, AllocMem, strDLLName, (UIntPtr)LenWrite, out bytesout);
// Function pointer "Injector"
UIntPtr Injector = (UIntPtr)GetProcAddress( GetModuleHandle("kernel32.dll"), "LoadLibraryA");

if (Injector == null)
{
MessageBox.Show(" Injector Error! \n ");
// return failed
return;
}

// Create thread in target process, and store handle in hThread
IntPtr hThread = (IntPtr)CreateRemoteThread(hProcess, (IntPtr)null, 0, Injector, AllocMem, 0, out bytesout);
// Make sure thread handle is valid
if ( hThread == null )
{
//incorrect thread handle ... return failed
MessageBox.Show(" hThread [ 1 ] Error! \n ");
return;
}
// Time-out is 10 seconds...
int Result = WaitForSingleObject(hThread, 10 * 1000);
// Check whether thread timed out...
if (Result == 0x00000080L || Result == 0x00000102L || Result == 0xFFFFFFFF)
{
/* Thread timed out... */
MessageBox.Show(" hThread [ 2 ] Error! \n ");
// Make sure thread handle is valid before closing... prevents crashes.
if (hThread != null)
{
//Close thread in target process
CloseHandle(hThread);
}
return;
}
// Sleep thread for 1 second
Thread.Sleep(1000);
// Clear up allocated space ( Allocmem )
VirtualFreeEx(hProcess, AllocMem, (UIntPtr)0, 0x8000);
// Make sure thread handle is valid before closing... prevents crashes.
if (hThread != null)
{
//Close thread in target process
CloseHandle(hThread);
}
// return succeeded
return;
}

private void button1_Click(object sender, EventArgs e)
{
String strDLLName = "C:\\test.dll";
String strProcessName = "notepad";

Int32 ProcID = GetProcessId(strProcessName);
if (ProcID >= 0)
{
IntPtr hProcess = (IntPtr)OpenProcess(0x1F0FFF, 1,ProcID);
if (hProcess == null)
{
MessageBox.Show("OpenProcess() Failed!");
return;
}
else
InjectDLL(hProcess, strDLLName);
}
}
}
}

As you can see he commented it well already for people to look at. I'll show you whats going on and explain a few things.


Source Code:

[DllImport("kernel32")]
public static extern IntPtr CreateRemoteThread(
IntPtr hProcess,
IntPtr lpThreadAttributes,
uint dwStackSize,
UIntPtr lpStartAddress, // raw Pointer into remote process
IntPtr lpParameter,
uint dwCreationFlags,
out IntPtr lpThreadId
);

[DllImport("kernel32.dll")]
public static extern IntPtr OpenProcess(
UInt32 dwDesiredAccess,
Int32 bInheritHandle,
Int32 dwProcessId
);

[DllImport("kernel32.dll")]
public static extern Int32 CloseHandle(
IntPtr hObject
);

[DllImport("kernel32.dll", SetLastError = true, ExactSpelling = true)]
static extern bool VirtualFreeEx(
IntPtr hProcess,
IntPtr lpAddress,
UIntPtr dwSize,
uint dwFreeType
);

[DllImport("kernel32.dll", CharSet = CharSet.Ansi, ExactSpelling = true)]
public static extern UIntPtr GetProcAddress(
IntPtr hModule,
string procName
);

[DllImport("kernel32.dll", SetLastError = true, ExactSpelling = true)]
static extern IntPtr VirtualAllocEx(
IntPtr hProcess,
IntPtr lpAddress,
uint dwSize,
uint flAllocationType,
uint flProtect
);

[DllImport("kernel32.dll")]
static extern bool WriteProcessMemory(
IntPtr hProcess,
IntPtr lpBaseAddress,
string lpBuffer,
UIntPtr nSize,
out IntPtr lpNumberOfBytesWritten
);

[DllImport("kernel32.dll", CharSet = CharSet.Auto)]
public static extern IntPtr GetModuleHandle(
string lpModuleName
);

[DllImport("kernel32", SetLastError = true, ExactSpelling = true)]
internal static extern Int32 WaitForSingleObject(
IntPtr handle,
Int32 milliseconds
);

Syntax Look Familiar?
If you saw my bot you'd recognize it. These are more platform invokes. So yet again he is calling functions from other places.

• CreateRemoteThread - This is basically putting the information from the dll into a new thread in the target process.
• OpenProcess - He uses this to get handle information from the process.
• CloseHandle - It cuts the connection to the process after it is either done or returns an error.
• VirtualFreeEx - It clears the area you are putting information into.
• GetProcAddress - Get's the Address of a process
• VirtualAllocEx - Set's aside the memory you are going to write to.
• WriteProcessMemory - He writes the Dll filename into the process.
• GetModuleHandle - He uses it as a parameter for GetProcAddress for getting kernal32.dll's handle
• WaitForSingleObject - To wait for the thread to finish to see if it worked. 

SC DLL Injector C# Source System Internal

Well have fun with it!

Sumber : http://www.mpgh.net/forum/showthread.php?t=154926&highlight=internal+injector

SC DLL Injector C# Source System Internal