flat assembler

Index > Windows > ..

Author

Thread

pool

Joined: 08 Jan 2007
Posts: 97

pool 18 Aug 2012, 19:55

Last edited by pool on 17 Mar 2013, 12:09; edited 1 time in total

18 Aug 2012, 19:55

Enko

Joined: 03 Apr 2007
Posts: 676
Location: Mar del Plata

Enko 18 Aug 2012, 20:01

What about WinExec?
http://msdn.microsoft.com/en-us/library/windows/desktop/ms687393(v=vs.85).aspx

18 Aug 2012, 20:01

pool

Joined: 08 Jan 2007
Posts: 97

pool 18 Aug 2012, 20:07

Last edited by pool on 17 Mar 2013, 12:09; edited 1 time in total

18 Aug 2012, 20:07

pool

Joined: 08 Jan 2007
Posts: 97

pool 18 Aug 2012, 20:40

Last edited by pool on 17 Mar 2013, 12:09; edited 1 time in total

18 Aug 2012, 20:40

Enko

Joined: 03 Apr 2007
Posts: 676
Location: Mar del Plata

Enko 18 Aug 2012, 21:02

Works fine for me on xp 32bit.

Code:

section ".data" data readable writeable
        prog db 'mspaint.exe',0
        param db '',0


section ".code" code readable writeable executable
start:

       invoke   WinExec, prog, param
       invoke   ExitProcess, 0

or you can use the c runtime.
http://msdn.microsoft.com/en-us/library/431x4c1w(v=vs.80).aspx

you will need to import the function from mvcrt.dll and use cinvoke insted of invoke.

Code:

import msvcrt,\  
  _wexecl,'_wexecl',\
       _wexecle,'_wexecle',\
       _wexeclp,'_wexeclp',\
       _wexeclpe,'_wexeclpe',\
       _wexecv,'_wexecv',\
       _wexecve,'_wexecve',\
       _wexecvp,'_wexecvp',\
       _wexecvpe,'_wexecvpe',\

18 Aug 2012, 21:02

pool

Joined: 08 Jan 2007
Posts: 97

pool 18 Aug 2012, 21:33

Last edited by pool on 17 Mar 2013, 12:09; edited 1 time in total

18 Aug 2012, 21:33

Enko

Joined: 03 Apr 2007
Posts: 676
Location: Mar del Plata

Enko 18 Aug 2012, 22:04

You need to put: ENTRY START after format PE GUI.

Code:

format PE GUI 4.0
entry start ;<<<<<<<<<<<<<<<<<<<<<<<<
include 'win32a.inc'

section ".data" data readable writeable 
prog db 'mspaint.exe',0 
param db '',0 


section ".code" code readable  executable
start: 

invoke WinExec, prog, param 
invoke ExitProcess, 0 

section '.idata' import data readable writeable 

library kernel32,'KERNEL32.DLL',\ 
user32,'USER32.DLL' 

include 'api\kernel32.inc'
include 'api\user32.inc'

now it works

18 Aug 2012, 22:04

pool

Joined: 08 Jan 2007
Posts: 97

pool 18 Aug 2012, 23:25

Last edited by pool on 17 Mar 2013, 12:09; edited 1 time in total

18 Aug 2012, 23:25

Goplat

Joined: 15 Sep 2006
Posts: 181

Goplat 19 Aug 2012, 19:06

Windows never kills a process just because the process that created it exited, regardless of the API used for creation. However, if the "parent" and "child" processes share a console window, then certain actions the user might take to kill the parent (pressing Ctrl-C/Ctrl-Break or closing the console window) would also affect the child.

If the child is not supposed to use the console, then it should be linked as a GUI application instead of a console application (in fasm: "format PE GUI"). If the child is supposed to use the console but you want to create it in its own console window, have the parent use the CREATE_NEW_CONSOLE flag with CreateProcess.

Enko wrote:

Code:

prog db 'mspaint.exe',0 
param db '',0 
[...]
invoke WinExec, prog, param 
invoke ExitProcess, 0

The second parameter to WinExec is supposed to be an SW_ constant, not a pointer. This example only works because mspaint.exe apparently ignores its STARTUPINFO.wShowWindow value; other GUI programs like notepad.exe might end up having their window be invisible.

19 Aug 2012, 19:06

pool

Joined: 08 Jan 2007
Posts: 97

pool 19 Aug 2012, 23:40

Last edited by pool on 17 Mar 2013, 12:09; edited 1 time in total

19 Aug 2012, 23:40

typedef

Joined: 25 Jul 2010
Posts: 2909
Location: 0x77760000

typedef 20 Aug 2012, 22:40

Additionally you can try

Code:

ShellExecuteA /ShellExecuteW

20 Aug 2012, 22:40

< Last Thread | Next Thread >

Forum Rules:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum