ASM Polymorphic shellcode (SLAE x86 Assignment #6)


This is assignment #6 of the SLAE x86 Exam objectives.


  • Take up 3 shellcodes from Shell-Storm and create polymorphic versions of them to beat pattern matching
  • The polymorphic versions cannot be larger than 150% of the existing shellcode
    • Bonus points for making it shorter in length than original
Continue reading “ASM Polymorphic shellcode (SLAE x86 Assignment #6)”

C: changing shellcode bytes at the middle (or at shellcode offset)

The Problem

While writing a bindshell shellcode for the SLAE32 course Assignment #1, which will be described in details another blog post, there was an interesting issue while coding the C program. As the exercise required some flexibility on passing the port as an argument, the issue was that there is not a direct way to alter the 2 bytes of shellcode in C, so if you are looking for a way to change some bytes at the middle or at an offset of your shellcode the solution follows below.

Continue reading “C: changing shellcode bytes at the middle (or at shellcode offset)”