Shellen is an interactive shellcoding environment. If you want a handy tool to write shellcodes, then shellen may be your friend. Also, it can be used just as assembly/disassembly tool.
Shellen works only on python3. Maybe it will be changed in the future.
Installing
You can install the stable version of shellen using pip3:
$ sudo pip3 install shellen$ python3 setup.py installHow to run:
After installing shellen and all its required packages, you can run shellen just by typing the next in your terminal:
$ shellenhelp command inside the tool, that will explain almost everything.Features
Shellen was created for assembling and disassembling instructions, so there are two modes of using the tool: asm and dsm respectively. Of course, there are some other possibilities like syscalls tables, common shellcodes and other.
Problems/New features
If you find a problem/bug or something, then just write an issue about this problem. Also, if you think, that some feature will be nice to use in shellen, then do the same -- write an issue and I will try to add this feature.
Prompt
It also has a usefull prompt, displaying current mode, OS (Operating System for syscalls) and chosen architecture exactly for this mode. It looks as follows:
L:asm:x86_32 >L is the shortened name of Linux in the prompt. Below listed all other OS names:Lis LinuxWis WindowsMis MacOS
setos [linux/windows/macos] as follows:L:asm:x86_32 > setos windows
[+] OS changed to windows.asm or dsm in the prompt.L:dsm:arm32 > asm
[+] Changed to asm (assembly) mode
L:asm:x86_32 > dsm
[+] Changed to dsm (disassembly) mode
L:dsm:arm32 > Assembling
To assembly instuctions, type them separated by colons as follows:
L:asm:x86_32 > mov edx, eax; xor eax, eax; inc edx; int 80;
[+] Bytes count: 7
Raw bytes: "\x89\xc2\x31\xc0\x42\xcd\x50"
Hex string: "89c231c042cd50"Disassembling
It works exactly as assembling. Type your bytes in the input prompt and see the result!
L:dsm:x86_32 > 89c231c042cd50
0x00080000: mov edx, eax
0x00080002: xor eax, eax
0x00080004: inc edx
0x00080005: int 0x50Architectures
asm and dsm modes work for different architectures. To see a list of available architectures for a current mode, type this:L:dsm:x86_32 > archs
┌────────┬────────┬─────────┬─────────┬────────┐
│ │ │ │ │ │
│ arm32 │ mips32 │ sparc32 │ systemz │ x86_16 │
│ arm64 │ mips64 │ sparc64 │ │ x86_32 │
│ arm_tb │ │ │ │ x86_64 │
└────────┴────────┴─────────┴─────────┴────────┘L:dsm:x86_32 > setarch arm32
[+] Architecture of dsm changed to arm32Syscalls
It's apparent that in process of crafting a shellcode you will be needed syscalls. So, shellen will help you with that. Just type
sys with a name of desired syscall and shellen will show you a list of possible syscalls you were looking for.L:asm:x86_32 > sys open
┌────────┬───────┬──────────────────────┬──────────────────────┬──────────────┬──────────────┐
│ name │ eax │ ebx │ ecx │ edx │ esi │
├────────┼───────┼──────────────────────┼──────────────────────┼──────────────┼──────────────┤
│ open │ 0x05 │ const char *filename │ int flags │ umode_t mode │ - │
│ openat │ 0x127 │ int dfd │ const char *filename │ int flags │ umode_t mode │
└────────┴───────┴──────────────────────┴──────────────────────┴──────────────┴──────────────┘x86_32 and Linux.Common shellcodes
Shellen can show you a list of common shellcodes depending on your keyword. The example of using placed in
Pictures section. It uses API of shell-storm.org site (thanks to the author!). You can use it like this:L:asm:x86_32 > shell <keyword> <count>count parameter isn't required.Operating Systems
It was assumed that there will be several OSs (Linux, Windows and MacOS), but right now supported only Linux. If you want to add functionality for Windows or MacOS, then write an issue and I will add it.
Base commands
| Command | Description |
|---|---|
clear | Clear the terminal screen. As usual cls on Windows or clear on *nix systems. |
help | Show the help message. |
quit,q,exit | Finish the current session and quit |
Requirements
Pictures
Just a little bunch of pictures.
