SLAE32 Certification

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Phrozen SLAE32 Certification - Papers

Assignment N°4 - Encoder (NASM) 23 Nov 2020

Assignment Goals (SLAE-1530)

Create a custom encoding scheme.
PoC with using execve-stack as the shellcode.

Creating our own encoder

Shellcode encoders are useful for two main reasons:

Minimize the risk of getting cough by detection systems.
Avoid bad characters from our original shellcode.

An encoder take a shellcode in input and output a different looking shellcode without affecting it functionality.

The main disadvantage with encoding is that your shellcode size will naturally increase.