5/15/2023 0 Comments Aborange crypter portableI will mostly talk about binary crypters, however, the concept as defined in previous paragraphs, can also be applied to scripting languages or bytecode-based platforms (like Java or. The crypter, usually encrypts the code of the program, that is, the executable sections and optionally, the read-only section where stuff like literal strings ends up (so strings will show nothing). I prefer to refer to this last one as stub or crypter stub, but you will see some people naming it just crypter. In practice, the part of the modified program that actually decrypts the code at run-time is also often known as crypter. Strictly speaking, a crypter is a program able to encrypt a binary (another program) and modify it so it will decrypt itself at run-time. Technically, crypters, in their traditional form, are closer related to virus, than to any other malware, in the sense that they require in deep knowledge of the binary format of the target system (ELF, PE,…), but this looks like a good time to start digging into them and add some spice to our RATs. You will learn everything about these little guys which are a usual component of different types of malware, including the RATs that we are discussing right now. This is the first instalment to dive you deep into the awesome world of crypters.
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