just few lines of MASM to get infos about the current OS:
Code:
TITLE GetOSVersion
.586
.model flat,stdcall
option casemap:none
assume fs:nothing
include windows.inc
include user32.inc
include kernel32.inc
includelib user32.lib
includelib kernel32.lib
WIN_2K equ 0h
WIN_XP equ 1h
WIN_2K3 equ 2h
WIN_NT equ 4h
WIN_VISTA equ 6h
.data
mbtitle BYTE "GetOSVersion",0h
winNT BYTE "found winNT!",0h
win2K BYTE "found win2K!",0h
win2K3 BYTE "found win2K3!",0h
winXP BYTE "found winXP!",0h
winVista BYTE "found winVista!",0h
.code
main proc
push MB_OK
push offset mbtitle
mov esi, fs:[30h] ; PEB
mov eax, [esi + 0a4h] ; majorV
cmp eax, WIN_NT
jbe @winNT
cmp eax, WIN_VISTA
jz @winVista
mov ebx, [esi + 0a8h] ; minorV
cmp ebx, WIN_2K
jz @win2K
cmp ebx, WIN_XP
jz @winXP
cmp ebx, WIN_2K3
jz @win2K3
@winNT:
push offset winNT
jmp @cont
@win2K:
push offset win2K
jmp @cont
@win2K3:
push offset win2K3
jmp @cont
@winXP:
push offset winXP
jmp @cont
@winVista:
push offset winVista
jmp @cont
@cont:
push 0
call MessageBox
push 0
call ExitProcess
main endp
end main
It's also possible to add win9x... this is your homework :)
