"System.ComponentModel.Win32Exception: Access is denied", this error is appearing while I am attempting to do two things:
while attempting this (Code block 1):
Code:
_class = new Proc(Process.GetProcessesByName("procname")[0]);
then in the class Proc whats happening is
Code:
public Proc(Process _SelectedProcess)
{
Process = _SelectedProcess;
}
public Process Process
{
get
{
return SelectedProcess;
}
set
{
SelectedProcess = value;
if (SelectedProcess != null)
{
Process.EnterDebugMode();
_Reader = new Win32_Memory(value.Handle, value.MainModule.BaseAddress.ToInt32(), value.Id);
}
}
}
sometimes this passes without any exception for no apparent reason as far as I see.
Note: it never passes in windows 7, I'm using windows 10 and sometimes it happens that the function works
but if it does pass, the next time I need to use OpenProcess() outside of the Process class, I almost always get the exception, and if i do, then afterwards it fails executing code block 1 if I try to do so again.
this (code block 2) also gets the same access denied error, and sometimes doesnt...
Code:
if (_Reader.ReadInt(_addr) == 1) _Reader.Write(_addr, 0);
public bool Write(int address, long value)
{
hProc = OpenProcess(ProcessAccessFlags.VMWrite, false, ID);
byte[] val = BitConverter.GetBytes(value);
bool worked = WriteProcessMemory(hProc, new IntPtr(address), val, (uint)val.LongLength, 0);
CloseHandle(hProc);
return worked;
}
the access flags:
Code:
[Flags]
public enum ProcessAccessFlags : uint
{
All = 0x001F0FFF,
Terminate = 0x00000001,
CreateThread = 0x00000002,
VMOperation = 0x00000008,
VMRead = 0x00000010,
VMWrite = 0x00000020,
DupHandle = 0x00000040,
SetInformation = 0x00000200,
QueryInformation = 0x00000400,
Synchronize = 0x00100000
}
the imports:
Code:
[DllImport("kernel32.dll")]
private static extern IntPtr OpenProcess(ProcessAccessFlags dwDesiredAccess, [MarshalAs(UnmanagedType.Bool)] bool bInheritHandle, int dwProcessId);
[DllImport("kernel32.dll", SetLastError = true)]
private static extern bool WriteProcessMemory(IntPtr hProcess, IntPtr lpBaseAddress, byte[] lpBuffer, uint nSize, int unused);
also worth noting that sometimes all of this code gets executed without ANY error and will work for as long as I do not reopen this application or if i do not restart the targeted application.
this happens only on windows 10 (sometimes it works, sometimes it doesn't)
on windows 7 ive also tested and it never worked, everytime I opened it I always got error code 5 access is denied
besides my own program, I've also tried cheat engine on this process and it also got access denied, as well as artmoney pro and olydbg - all of them got access denied when using the OpenProcess() function