HatSploit native powerful payload generation and shellcode injection tool that provides support for common platforms and architectures.

Overview

HatVenom

HatSploit native powerful payload generation and shellcode injection tool that provides support for common platforms and architectures.

Features

  • Support for most common executable formats like elf, macho, pe.
  • Support for most common architectures like x64, x86, aarch64, armle, mipsle, mipsbe.
  • Ability to modify shellcode by changing pre-defined offsets.

Installation

pip3 install git+https://github.com/EntySec/HatVenom

Basic functions

There are all HatVenom basic functions that can be used to generate payload, covert data or inject shellcode.

  • ip_bytes(ip) - Converts IP address to bytes allowed by shellcode.
  • port_bytes(port) - Converts numeric port to bytes allowed by shellcode.
  • string_bytes(string) - Converts string to bytes allowed by shellcode.
  • generate(file_format, arch, shellcode, offsets={}) - Generates payload for specified target and with specified shellcode.
  • generate_to(file_format, arch, shellcode, offsets={}, filename='a.out') - Generates payload for specified target and with specified shellcode and saves it to the specified file.

Generating payload

It's very easy to generate payload for various targets in HatVenom. Let's generate simple payload that calls shutdown for Linux and save it to a.out.

Examples

from hatvenom import HatVenom

shellcode = (
    b"\x48\x31\xc0\x48\x31\xd2\x50\x6a"
    b"\x77\x66\x68\x6e\x6f\x48\x89\xe3"
    b"\x50\x66\x68\x2d\x68\x48\x89\xe1"
    b"\x50\x49\xb8\x2f\x73\x62\x69\x6e"
    b"\x2f\x2f\x2f\x49\xba\x73\x68\x75"
    b"\x74\x64\x6f\x77\x6e\x41\x52\x41"
    b"\x50\x48\x89\xe7\x52\x53\x51\x57"
    b"\x48\x89\xe6\x48\x83\xc0\x3b\x0f"
    b"\x05"
)

hatvenom = HatVenom()
hatvenom.generate_to('elf', 'x64', shellcode)

Payload offsets

Payload offsets is a variables used to add something to shelcode on the preprocessing stage. Offsets looks like this:

\x90\x90\x90\x90:message:string:\x90\x90\x90\x90

Where message is an offset name and string is an offset type. So the basic usage of the offset looks like:

[shellcode]:[name]:[type]:[shellcode]

There are some possible offsets types:

  • string - Plain text that will be converted to bytes on the preprocessing stage.
  • ip - IP address that will be converted to bytes on the preprocessing stage.
  • port - Numeric port that will be converted to bytes on the preprocessing stage.

So if you want to replace offset with bytes instead of string, ip and port, you can use this type:

[shellcode]:[name]:[shellcode]

Examples

Let's generate simple payload that executes provided through file offset file for macOS and save it to a.out.

from hatvenom import HatVenom

shellcode = (
    b"\x48\x31\xf6\x56\x48\xbf"
    b":file:string:"
    b"\x57\x48\x89\xe7\x48\x31"
    b"\xd2\x48\x31\xc0\xb0\x02"
    b"\x48\xc1\xc8\x28\xb0\x3b"
    b"\x0f\x05"
)

hatvenom = HatVenom()
hatvenom.generate_to('macho', 'x64', shellcode, {'file':'//bin/ps'})

HatVenom CLI

HatVenom also has their own command line interface that can be invoked by executing hatvenom command:

usage: hatvenom [-h] [--format FORMAT] [--arch ARCH] [--shellcode SHELLCODE] [--offsets OFFSETS] [-o OUTPUT] [-l]

Powerful payload generation and shellcode injection tool that provides support for common platforms and architectures.

optional arguments:
  -h, --help            show this help message and exit
  --format FORMAT       Platform to generate for.
  --arch ARCH           Architecture to generate for.
  --shellcode SHELLCODE
                        Shellcode to inject.
  --offsets OFFSETS     Shellcode offsets.
  -o OUTPUT, --output OUTPUT
                        File to output generated payload.
  -l, --list            List all formats and platforms.

Examples

Let's generate simple payload that kills all processes for Linux and save it to a.out.

hatvenom --format elf --arch x64 --shellcode "\x6a\x3e\x58\x6a\xff\x5f\x6a\x09\x5e\x0f\x05"

output:

[*] Generating payload...
[i] Final payload size: 131
[*] Saving payload to a.out...
[+] Payload saved to a.out!

NOTE: If you want to use offsets in the CLI version of HatVenom, then you should use --offsets one=1,two=2

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EntySec
EntySec is a group of security professionals and software engineers involved in the development of security tools and services.
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