Batch command competition

[prosoft]

You must find a batch command to disable in windows xp sp2 the DEP (Data Execution Prevention) service.The command must be executed from Start>Run>cmd or from a batch file (.bat) like other command (eg: netsh firewall show config, netstat ..)

[nosph3rat]

You must find a batch command to disable in windows xp sp2 the DEP (Data Execution Prevention) service.The command must be executed from Start>Run>cmd or from a batch file (.bat) like other command (eg: netsh firewall show config, netstat ..)

- Click on Start - Run, then enter “cmd.exe” in the Open field and click OK or hit Enter.

- When Command Console opens, type “cd C:\” then Enter. You should see “C:\>”

- Type “notepad.exe boot.ini” then Enter

- When the boot.ini file opens in Notepad, change “/noexecute=optin” to “/execute=optin” and Save.

- Close Notepad. Return to the Command Console window.

- Type “exit” then Enter.

[prosoft]

Must say that we have a possible winner nosph3rat...please demonstrate that you can do this from a batch file (.bat) without any keyboard pressing, with a normal execution of batch, and you will be graduate for this.

Edited August 28, 2009 by prosoft

[cmiN]

The script have two options:

E - Enable Data Execution Prevention

D - Disable Data Execution Prevention

And the Batch http://pastebin.com/f42125692

@echo off
:: 29.08.2009 <> 29.08.2009 | cmiN
:: Challenge [Batch] Bcc DEP [prosoft] @ rstcenter.com


:main

cd %systemroot%
cd ..
echo E - Enable Data Execution Prevention
echo D - Disable Data Execution Prevention
set /p answer=
if "%answer%"=="E" (
    set status=noexecute
    goto replace     
)
if "%answer%"=="D" (
    set status=execute
    goto replace
)
echo Invalid option!
pause >nul
exit


:replace

type nul>boot.tmp
for /f "tokens=1,2* delims==" %%a in (boot.ini) do (
    if "%%b"=="" (
        echo %%a>>boot.tmp
    ) else (
        for /f "tokens=1,2 delims=/" %%x in ("%%b") do (
            if "%%y"=="noexecute" (
                if "%%c"=="" (
                    echo %%a=%%x/%status%>>boot.tmp
                ) else (
                    echo %%a=%%x/%status%=%%c>>boot.tmp
                )
            ) else (
                if "%%y"=="execute" (
                    if "%%c"=="" (
                        echo %%a=%%x/%status%>>boot.tmp
                    ) else (
                        echo %%a=%%x/%status%=%%c>>boot.tmp
                    )
                ) else (
                    if "%%c"=="" (
                        echo %%a=%%b>>boot.tmp
                    ) else (
                        echo %%a=%%b=%%c>>boot.tmp
                    )
                )
            )
        )
    )
)
attrib -s -h -r boot.ini
del boot.ini /f /q
ren boot.tmp boot.ini
attrib +r +h +s boot.ini
echo Ready.
pause >nul
exit

If you want to do this without pressing a key delete from lines [10:23].

But I can't believe it's so easy in Python:

import os

os.chdir(os.getenv("systemroot")[:3])
os.system("attrib -s -h -r boot.ini")
with open("boot.ini", "r") as f:
    x = f.read().replace("noexecute", "execute")
    open("boot.ini", "w").write(x)
os.system("attrib +r +h +s boot.ini")

[prosoft]

The batch script doesn't work on W2K,XP-SP2, please attach the .bat file that you have run'it

[cmiN]

Put the code in a .bat text file and 100% will work from any path, I have xp sp3 and I don't think to be a major difference. I've tested manually!