[Illicit]

I used c++ to compile my payload and now I have an executable file.From here how do I turn this into shellcode.

Answers are appreciated! :p

[Николай]

A shellcode is a result of opcode such as \xcd\x80 in hexadecimal and int 0x80 (system call) in assembly. If you want to execute a shellcode code through a binary that contains a vulnerabilty such as buffer overflow you have to write you code in assembly language then extract these opcodes without any nullbytes that means you have to know the basics of assembly to play with the different size of register.

Amazing video series : http://www.securitytube.net/groups?opera...&groupId=4

I hope you understand what i meant, i'm french.

[EIP]

I used c++ to compile my payload and now I have an executable file.From here how do I turn this into shellcode.

Answers are appreciated! :p

You can get opcode using some tools like objdump. There are some restriction if you write your shellcode in C . For example the variable in C which is in section .data in ASM and should not followed by shellcode. The shellcode should be within section .text . For example :

section .text
global _start
_start:
mov al,0x1 ;not eax since it is 32bytes wheres 0x01 is not.

In my opinion you should write your shellcode in ASM (Perhaps not that hard if you keep your shellcode small and always should be).

How many lines in your C sources and perhaps talking with system calls?

[βτħ™]

Slap your code into a dll file and use some pre-made staged shellcode bro...

[Illicit]

Thanks guys :P I found a way before I read this though lawl.
Im using objdump btw.

[supracontra]

You have in your signature a guide you wrote called a beginners guide to shellcoding and you're here asking about how to write shellcode....

420 yolo swag.

[Sidi0u5]

Doesn't metasploit have a feature that can do this for you?