Binary data in batch file

I am not encouraging you to use this technique for malicious purposes, instead I am drawing your attention to the potential harm that can be achieved using the Batch scripting language alone. The idea behind embedding one or more executables or any other binary file in the Batch script is to be able to decode text into binary data using the Batch script. One way to do that is to rely on the certutil. The Batch script can then pick up the embedded base64 text, decode it to a temporary executable file, execute the file then delete it.

That was one way of doing it. Malicious malware writers can even employ further encoding and decoding on top of the base64 encoding to evade signature based detection. As the Batchography book explains, doing this in the Batch language is not hard at all! Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown.

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New post summary designs on greatest hits now, everywhere else eventually. Linked Posted PM views. Experts, I have a data stored as binary in the server and I want to convert the banary data into PDF format. Re: How to create batch PDF files from banary data files.

Posted PM views In reply to tekish. Post any errors from the log. Your data looks like hexadecimal codes, not binary data. So something like this is more suitable.

Equ 0 Echo The specified file is empty. BIN "! It's because the CMD is a text based C console program and it basically reads and writes strings. That means this character can never belong to the content of a string. Regards aGerman.