How to encrypt & decrypt batch processing - China DOS Union Forum

（Transfer）BAT Encryption and Decryption Article
-----------------------------------------------------------
This is a piece of bat encryptor code

author:pengfei@www.cn-dos.net
%%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a
cls
@echo off
color 27
:start
cls
echo *******************************************************************************
echo * *
echo * BAT 加密最终版 *
echo * *
echo *******************************************************************************
echo.
echo.
echo BAT encryption final version is an updated version of "BAT encryption tool". Compared with the previous version of the encryption tool, it has many advantages:
echo.
echo ★ Can successfully encrypt any batch processing file at one time, which is more convenient.
echo.
echo ★ You can input any batch processing that needs to be encrypted, and the encryption flexibility is greater.
echo.
echo ★ Can automatically judge wrong input, more humanized.
echo.
echo Description: Enter the batch processing file that needs to be encrypted below, directly enter the batch processing file name to encrypt the BAT in the current directory, or you can specify any BAT with a path. The encrypt.bat file generated in the current directory is the encrypted batch processing.
echo.
echo Author: Mulinsen QQ:573381312 BYE
echo.
echo.
echo.
set /p file=Please enter the batch processing that needs to be encrypted and press Enter (q=quit):
if "%file%"=="q" goto quit
echo %file%|findstr /i "\.bat$">nul && goto go
echo %file%|findstr /i "\.cmd$">nul && goto go
cls
echo ==============
echo Please enter correctly!
echo ==============
echo.
echo.
echo Press any key to re-enter......
pause>nul
goto start
:go
if not exist "%file%" goto newly
if exist encrypt.bat copy encrypt.bat encryptbak.bat
echo %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a >"%tmp%\encrypt.tmp"
echo cls>>"%tmp%\encrypt.tmp"
type "%file%">>"%tmp%\encrypt.tmp"
setlocal enabledelayedexpansion
for %%i in ("%tmp%\encrypt.tmp") do (
echo %%~zi >nul 2>nul
set size=%%~zi
set num=!size:~-1!
set /a mod=!num!%%2
if !mod! equ 0 (goto even) else (goto odd)
)
:even
copy "%tmp%\encrypt.tmp" encrypt.bat
del "%tmp%\encrypt.tmp"
cls
echo ==========================
echo Congratulations, batch processing encryption is successful^^!
echo ==========================
echo.
echo.
echo Press any key to exit......
pause>nul
goto quit
:odd
echo. >>"%tmp%\encrypt.tmp"
copy "%tmp%\encrypt.tmp" encrypt.bat
del "%tmp%\encrypt.tmp"
cls
echo ==========================
echo Congratulations, batch processing encryption is successful^^!
echo ==========================
echo.
echo.
echo Press any key to exit......
pause>nul
goto quit
:newly
cls
echo ================================
echo Batch processing file not found, please re-enter!
echo ================================
echo.
echo.
echo Press any key to start......
pause>nul
goto start
:quit
exit

---------------------------------------------------------------------------------------------
The following is the bat decryptor code
---------------------------------------------------------------------------------------------
@echo off
mode con: cols=80 lines=25
:index
color 27
cls
echo ╭───────────────╮
echo │ │
echo ╭─────────┤ BAT 解密工具 ├─────────╮
echo │ │ │ │
echo │ ╰───────────────╯ │
echo │ │
echo │ │
echo │ This tool is used to decrypt encrypted batch processing with confused text encoding type! │
echo │ │
echo │ Fill in the batch processing that needs to be decrypted below and press Enter. │
echo │ │
echo │ It is recommended to directly drag and drop the batch processing file to be decrypted into this window to release. │
echo │ │
echo │ After successful decryption, a file in the format "new_original file name.file suffix name" will be generated in the directory of this program │
echo │ format file. │
echo │ │
echo │ Note: If there is a file "new_original file name.file suffix name" in this directory, │
echo │ will be replaced. │
echo │ │
echo │ │
echo ╰───────────────────────────────────╯
echo.
set route=%cd%
set ravel=
set /p ravel= Please enter the batch processing to be decrypted:
set "ravel=%ravel:"=%"
if /i "%ravel:~-4%"==".bat" if exist "%ravel%" goto go
if /i "%ravel:~-4%"==".cmd" if exist "%ravel%" goto go
cls
echo ╭──────────╮
echo ╭─────────┤ 文件错误 ├────────╮
echo │ ╰──────────╯ │
echo │ │
echo │ The specified file does not exist or the file is not a batch processing type! │
echo │ │
echo │ Press any key to re-enter... │
echo │ │
echo ╰─────────────────────────────╯
echo.
echo.
echo Press any key to re-enter...
pause >nul
goto index

:go
for /f "tokens=*" %%c in ("%ravel%") do (
cd /d "%%~dpc"
if exist "%route%\new_%%~nxc" attrib -s -h -r -a "%route%\new_%%~nxc"
echo author:pengfei@www.cn-dos.net>"%route%\new_%%~nxc"
for /f "tokens=*" %%i in (%%~nxc) do (
echo %%i>>"%route%\new_%%~nxc"
)
)
cls
echo ╭──────────╮
echo ╭─────────┤ 解密成功 ├────────╮
echo │ ╰──────────╯ │
echo │ │
echo │ Congratulations, batch processing decryption is successful! │
echo │ │
echo ╰─────────────────────────────╯
echo.
echo.
echo Press any key to exit...
pause >nul
exit

Floor1　jiangnan110	Posted 2007-06-08 12:47
初级用户　Posts 19　Credits 42
As the title says I've only been learning for a few days, hope everyone can help, thank you...!!!

Floor2　baomaboy	Posted 2007-06-08 13:03
银牌会员　Posts 554　Credits 1,513
Is it encrypted? Or just a distraction?

Floor3　jlygq1968	Posted 2007-06-08 13:18
初级用户　Posts 9　Credits 46
Originally posted by jiangnan110 at 2007-6-8 12:47 PM: As the title I've only learned for a few days, hope everyone can help, thank you...!!! Is it to prevent decompilation, that is, to display garbled code????

Floor4　qinbuer	Posted 2007-06-08 13:22
高级用户　Posts 228　Credits 512
I think, maybe we can make a batch script that shuffles the batch scripts that need to be encrypted in a certain order or replaces them with other characters, and restores them in a certain order when decrypting. But in this way, the batch script cannot run before decryption, and it can be decrypted by others with only a certain patience. Or convert it to an EXE, but then it's troublesome to view the source code...

Floor5　bjsh	Posted 2007-06-08 16:17
银牌会员　Posts 621　Credits 2,000
Search it; there are many of them

Floor6　zasxcdfv	Posted 2007-06-08 16:18
初级用户　Posts 75　Credits 152
（Transfer）BAT Encryption and Decryption Article ----------------------------------------------------------- This is a piece of bat encryptor code author:pengfei@www.cn-dos.net %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a %%a cls @echo off color 27 :start cls echo ******************************************************************************* echo * * echo * BAT 加密最终版 * echo * * echo ******************************************************************************* echo. echo. echo BAT encryption final version is an updated version of "BAT encryption tool". Compared with the previous version of the encryption tool, it has many advantages: echo. echo ★ Can successfully encrypt any batch processing file at one time, which is more convenient. echo. echo ★ You can input any batch processing that needs to be encrypted, and the encryption flexibility is greater. echo. echo ★ Can automatically judge wrong input, more humanized. echo. echo Description: Enter the batch processing file that needs to be encrypted below, directly enter the batch processing file name to encrypt the BAT in the current directory, or you can specify any BAT with a path. The encrypt.bat file generated in the current directory is the encrypted batch processing. echo. echo Author: Mulinsen QQ:573381312 BYE echo. echo. echo. set /p file=Please enter the batch processing that needs to be encrypted and press Enter (q=quit): if "%file%"=="q" goto quit echo %file%\|findstr /i "\.bat$">nul && goto go echo %file%\|findstr /i "\.cmd$">nul && goto go cls echo ============== echo Please enter correctly! echo ============== echo. echo. echo Press any key to re-enter...... pause>nul goto start :go if not exist "%file%" goto newly if exist encrypt.bat copy encrypt.bat encryptbak.bat echo %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a %%%%a >"%tmp%\encrypt.tmp" echo cls>>"%tmp%\encrypt.tmp" type "%file%">>"%tmp%\encrypt.tmp" setlocal enabledelayedexpansion for %%i in ("%tmp%\encrypt.tmp") do ( echo %%~zi >nul 2>nul set size=%%~zi set num=!size:~-1! set /a mod=!num!%%2 if !mod! equ 0 (goto even) else (goto odd) ) :even copy "%tmp%\encrypt.tmp" encrypt.bat del "%tmp%\encrypt.tmp" cls echo ========================== echo Congratulations, batch processing encryption is successful^^! echo ========================== echo. echo. echo Press any key to exit...... pause>nul goto quit :odd echo. >>"%tmp%\encrypt.tmp" copy "%tmp%\encrypt.tmp" encrypt.bat del "%tmp%\encrypt.tmp" cls echo ========================== echo Congratulations, batch processing encryption is successful^^! echo ========================== echo. echo. echo Press any key to exit...... pause>nul goto quit :newly cls echo ================================ echo Batch processing file not found, please re-enter! echo ================================ echo. echo. echo Press any key to start...... pause>nul goto start :quit exit --------------------------------------------------------------------------------------------- The following is the bat decryptor code --------------------------------------------------------------------------------------------- @echo off mode con: cols=80 lines=25 :index color 27 cls echo ╭───────────────╮ echo │ │ echo ╭─────────┤ BAT 解密工具 ├─────────╮ echo │ │ │ │ echo │ ╰───────────────╯ │ echo │ │ echo │ │ echo │ This tool is used to decrypt encrypted batch processing with confused text encoding type! │ echo │ │ echo │ Fill in the batch processing that needs to be decrypted below and press Enter. │ echo │ │ echo │ It is recommended to directly drag and drop the batch processing file to be decrypted into this window to release. │ echo │ │ echo │ After successful decryption, a file in the format "new_original file name.file suffix name" will be generated in the directory of this program │ echo │ format file. │ echo │ │ echo │ Note: If there is a file "new_original file name.file suffix name" in this directory, │ echo │ will be replaced. │ echo │ │ echo │ │ echo ╰───────────────────────────────────╯ echo. set route=%cd% set ravel= set /p ravel= Please enter the batch processing to be decrypted: set "ravel=%ravel:"=%" if /i "%ravel:~-4%"==".bat" if exist "%ravel%" goto go if /i "%ravel:~-4%"==".cmd" if exist "%ravel%" goto go cls echo ╭──────────╮ echo ╭─────────┤ 文件错误 ├────────╮ echo │ ╰──────────╯ │ echo │ │ echo │ The specified file does not exist or the file is not a batch processing type! │ echo │ │ echo │ Press any key to re-enter... │ echo │ │ echo ╰─────────────────────────────╯ echo. echo. echo Press any key to re-enter... pause >nul goto index :go for /f "tokens=" %%c in ("%ravel%") do ( cd /d "%%~dpc" if exist "%route%\new_%%~nxc" attrib -s -h -r -a "%route%\new_%%~nxc" echo author:pengfei@www.cn-dos.net>"%route%\new_%%~nxc" for /f "tokens=" %%i in (%%~nxc) do ( echo %%i>>"%route%\new_%%~nxc" ) ) cls echo ╭──────────╮ echo ╭─────────┤ 解密成功 ├────────╮ echo │ ╰──────────╯ │ echo │ │ echo │ Congratulations, batch processing decryption is successful! │ echo │ │ echo ╰─────────────────────────────╯ echo. echo. echo Press any key to exit... pause >nul exit

Floor7　lianjiang2004	Posted 2007-06-08 17:16
金牌会员　Posts 1,884　Credits 3,946
I've tried various methods from this forum, but basically none of them work. Either it can't run after encryption, or the source code can be seen with a general editing software after encryption. I haven't found an effective method for the time being.

Floor8　baomaboy	Posted 2007-06-08 18:42
银牌会员　Posts 554　Credits 1,513
I wrote a password - encrypted tool that encrypts a bat file into a vbs file, and after entering the password, restores the bat file. On Error Resume Next:Dim WshSHell,FSO,EnCText:Set WshSHell = WScript.CreateObject("WScript.Shell"):Set FSO = CreateObject("Scripting.FileSystemObject"):EnCText="71575206^l\]\lcaZo]^2\din]h4^beZr6]bpg紊皽剁搭惰范若顿返蕊钝范：皽iYln^":outmm=Inputbox(vbcr&vbcr&"Please enter the encryption password: (3 - 8 - digit number)","Encrypt/Decrypt Text File - By baomaboy","25926183"):If outmm = "" then:WScript.Quit(0):end if:Lcode = len(outmm):outcode = outmm & mid(EnCText,1,8 - Lcode):Dim KeyArr(8):KeyArr(0) = Lcode:for i = 1 to 8:KeyArr(i) = Mid(outcode,i,1):next Execute("EnCText=Mid(EnCText,9,Len(EnCText) - 8):For i = 1 To Len(EnCText)"&vbCrLf&"TempNum = Asc(Mid(EnCText,i,1))"&vbCrLf&"if TempNum = 18 Then"&vbCrLf&" TempNum = 34 "&vbCrLf&" end if "&vbCrLf&"TempNum = TempNum + KeyArr(i Mod 9)"&vbCrLf&"If TempNum = 28 Then"&vbCrLf&"TempNum = 13"&vbCrLf&"ElseIf TempNum = 29 Then"&vbCrLf&"TempNum = 10"&vbCrLf&"End If"&vbCrLf&"If TempNum > 23 and TempNum < 28 Then"&vbCrLf&"TempNum = TempNum - 20"&vbCrLf&"end if"&vbCrLf&"OCText = OCText & chr(TempNum)"&vbCrLf&"Next") Set OutFile = FSO.OpenTextFile("Temp.bat",2,true):OutFile.WriteLine(OCText):OutFile.Close:Set WshSHell = Nothing:Set FSO = Nothing:WScript.Quit(0)

Floor9　lianjiang2004	Posted 2007-06-08 18:46
金牌会员　Posts 1,884　Credits 3,946
Originally posted by baomaboy at 2007-6-8 18:42: Wrote one encrypted with a password, encrypting a bat to a vbs, entering the password to restore the bat file, On Error Resume Next:Dim WshSHell,FSO,EnCText:Set WshSHell = WScript.CreateObject("WScript.Shel ... Is there any special requirement for the operating system? It flashes by and doesn't pass under win xp.

Floor10　baomaboy	Posted 2007-06-08 19:08
银牌会员　Posts 554　Credits 1,513
There are no requirements for the system. You left, which means you saved the above as a bat, right? You need to save the code as a vbs instead.

Floor11　baomaboy	Posted 2007-06-08 19:09
银牌会员　Posts 554　Credits 1,513

Floor12　vkill	Posted 2007-06-08 19:53
金牌会员　Posts 1,744　Credits 4,103　From 甘肃.临泽
Originally posted by qinbuer at 2007-6-8 13:22: I think, perhaps we can make a batch file, scramble the batch files that need to be encrypted in a certain order or replace them with other characters, and when decrypting, restore them in a certain order. But in this way, before decrypting, the batch ... Not necessarily all can be decrypted! http://www.cn-dos.net/forum/viewthread.php?tid=28829&fpage=1&highlight=%E5%8A%A0%E5%AF%86 If you can decrypt this, I'll f you

Floor13　ken123888	Posted 2007-06-08 20:45
新手上路　Posts 8　Credits 17
Use a bat-to-exe ghost program.

Floor14　baomaboy	Posted 2007-06-08 20:48
银牌会员　Posts 554　Credits 1,513
Brother vkill, did you notice that your new version http://www.cn-dos.net/forum/viewthread.php?tid=28829&fpage=1&highlight=%E5%8A%A0%E5%AF%86 has started to be reported as a trojan virus by Kaspersky. [ Last edited by baomaboy on 2007-6-8 at 08:50 PM ]

Floor15　baomaboy	Posted 2007-06-08 21:17
银牌会员　Posts 554　Credits 1,513
Originally posted by qinbuer at 2007-6-8 13:22: I think, perhaps a batch file can be made to scramble the batch files that need to be encrypted in a certain order or replace them with other characters, and when decrypting, restore them in a certain order. But in this way, before decrypting, the batch ... I feel that when it comes to the essence, there are only two types. One is the so-called smokescreen that looks like garbled code but can be executed directly. It seems that the tools in the special discussion thread of this forum can deal with it. The other type is the one that requires a password. Currently, it seems that only brute-force cracking is used. The theory is crackable, but in reality, it is very, very difficult. The discussion about Ghost is no longer there. Let's talk about it when the temp file is solved.