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Write Process Memory

 
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cnodnarb
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Joined: 11 Sep 2002
Posts: 763
Location: Eastman, GA
PostPosted: Mon Mar 17, 2014 7:20 pm    Post subject: Write Process Memory Reply with quote
Confused

Normally I struggle through stuff before I ask, but this time I'm making an exception!

Anyone ever use WriteProcessMemory or have a good clue how to do so?

http://msdn.microsoft.com/en-us/library/windows/desktop/ms681674(v=vs.85).aspx

I need to write values to cityofheroes.exe which I now use as a miniature set since they shut down the server.

Memory address 01671544 is of primary concern.

Any help appreciated, I'll let you know if I crank it out beforehand!

Starts with info from this post...
http://www.vdsworld.com/forum/viewtopic.php?t=4911&highlight=memory
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cnodnarb
Professional Member
Professional Member


Joined: 11 Sep 2002
Posts: 763
Location: Eastman, GA
PostPosted: Mon Mar 17, 2014 9:58 pm    Post subject: Reply with quote
FAIL! Even switched to reading memory, thought it would be easier.

Code:

#DEFINE COMMAND,REDUCEMEMORY

# create a list to hold the names and process ids of all
# running programs
list create,1
%%ProcessId_Lst = 1
List TaskList,%%ProcessId_Lst,NI
# locate the vds.exe program
%A = @match(%%ProcessId_Lst,cityofheroes.exe)
If %A
  # extract the process id
  PARSE "%%name;%%id",@Item(%%ProcessId_Lst)
   # reduce the memory footprint of the exe.
  ReduceMemory %%id
Else
  Info could not find vds.exe
End
stop
:ReduceMemory
  # This subroutine will reduce the memory footprint
   # of the current exe or of the specified process ID
  loadlib kernel32.dll
  If %1
     # Get a handle to the specified process
    %h = @lib(kernel32,OpenProcess,INT:,INT:$1F0FFF,INT:0,INT:%1)
    info %h
%S = @FILL(255)
info @len(%S)
%L = @BINARY(LARGEINT,@LEN(%S))
      If @unequal(%h,0)
        # reduce its current memory
            %i = @lib(kernel32,ReadProcessMemory,INT:,%h,NIL:,$01671544,INT:,@addr("%S"),@addr("%L"))
            if %i
            info %i

            end
               # close the handle
      %h = @lib(kernel32,CloseHandle,BOOL:,INT:%h)
    End
  Else
     # reduce the memory usage of the current process
    #%t = @lib(psapi,EmptyWorkingSet,INT:,INT:-1)
  End
  freelib kernel32
              info @adjust(%S)
exit

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cnodnarb
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Joined: 11 Sep 2002
Posts: 763
Location: Eastman, GA
PostPosted: Tue Mar 18, 2014 6:08 pm    Post subject: BUMP Reply with quote
Could use help on this, otherwise I (may) have to rewrite a fairly large project in Visual Basic, which is second rate in my book ;(

I was able to write a Visual Basic DLL that does this, but for some reason it doesn't hook into a VDS executable properly. Only other VB executable will call it properly I think.

Now I do plan on writing some pretty cool DLL's for VDS in VB, but my VDSMemAddr.dll has bombed.
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