China DOS Union

This encryption method is the same as "copy/b a.txt+the file to be encrypted.bat encrypted.bat". Analyze and convert it through the file name of the third sentence to the "copy/b a.txt+the file to be encrypted.bat encrypted.bat" encryption method. If convenient, post your BAT for me to see. The several files I tried are normal.

Experts! I salute you!

I was quite busy some time ago, so I didn't post replies all the time. Today I had time and wrote the final version of BAT encryption.

While everyone was discussing intensely, I discovered the limitations of brother yuanyong630's encryption code during repeated testing. I used to think it was sensitive to certain characters, but later I realized it's actually sensitive to the parity of the file byte size. When the number of bytes is odd, encryption doesn't succeed; only even numbers can be encrypted.

So I improved this encryption tool, hoping everyone will like it~

Thanks to brother namejm for helping improve this tool!^_^

[ Last edited by pengfei on 2006-10-3 at 10:00 ]

@echo off
color 27
:start
cls
echo *******************************************************************************
echo * *
echo * BAT 加 密 最 终 版 *
echo * *
echo *******************************************************************************
echo.
echo.
echo The final version of BAT encryption is an updated version of the "BAT Encryption Tool", which has many advantages over the previous encryption tool:
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, which is 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

[ Last edited by pengfei on 2006-9-3 at 01:24 ]

Not bad, the functionality is relatively powerful, worthy of praise ^_^.

I took a rough look at the code, and there are still many places worth improving: for example, the sentence echo "%file%" | find /i ".bat" && goto go will misjudge non-batch files containing .bat in the file name, the sentence echo %%~zi >nul 2>nul is optional, and pause >nul 2>nul can be simplified to pause>nul, etc... Hehe, brother still needs to keep working hard, make some improvements in checking for omissions, humanization, conciseness, beauty, etc., and strive to make this tool a masterpiece in the forum.

It turns out that after discussing for so long, it's because it's sensitive to the parity of the file byte size. Hehe. It seems that XP still has quite a few bugs! ~~~

Mid-Autumn Festival is here. Have you all eaten mooncakes? Hehe~ If you have, send some to me.

I'm releasing a batch processing decryption tool as a Mid-Autumn Festival gift for everyone. It works for the encryption schemes of Brother yuanyong630 on and Brother zxcv on ~~~!

This is what I discovered when writing the encryption code (for extracting text lines is not restricted by the encoding type). Especially Brother zxcv's encryption scheme. If the code is in Chinese, edit will display garbled text, then everyone gets confused and hurries to find garbled text viewers, hex editors to view the source code.

Hehe~ Just drag the mouse here and press enter to solve it...

@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 obfuscated text encoding types!                │

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 extension" will be generated in the directory of this program      │

echo    │     Format file.                                                      │

echo    │                                                                      │

echo    │     Note: If a file with "new_original file name.file extension" exists in this directory,       │

echo    │     It 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          ╭─────────┤   File Error   ├────────╮

echo          │                  ╰──────────╯                │

echo          │                                                          │

echo          │    The specified file does not exist or the file is not of 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          ╭─────────┤   Decryption Successful   ├────────╮

echo          │                  ╰──────────╯                │

echo          │                                                          │

echo          │    Congratulations, batch processing decryption successful!                                 │

echo          │                                                          │

echo          ╰─────────────────────────────╯

echo.

echo.

echo Press any key to exit...

pause >nul

exit

[ Last edited by pengfei on 2006-10-6 at 10:22 ]

Bat decryption tool:

copy con xxx.bat

Everyone has a happy Mid-Autumn Festival ~~

[ Last edited by electronixtar on 2006-10-5 at 05:45 ]

Hehe, it turns out that just a for loop can do it. I really didn't expect it to be so simple.

Classic! Very delicious filling...

I use the browser to open it and it shows plain text.

If I change the extension to something else (.DOC/.TRF, etc.), I can see the plain text!!!

Actually, as long as you open it with the ASCII encoding format, you can see the plain text. Because Word comes with several kinds of encodings, and there is US-ASCII encoding among them. Hehe, it seems that Word is a relatively good garbled code viewer.

"Unicom" becomes garbled code, how did you find it. Really a smart person.

In fact, as long as you enter characters with the "ear" radical combined with "tong" it's all garbled code!!!!!

Such as "zhitong"!!

[ Last edited by yiping1973 on 2006-10-16 at 01:41 ]

How to open it with tools like C32ASM binary and see the source code.