HexFiend VS scapy

For macOS users, there's also native app Hex Fiend (open source) which also has a pattern language.

https://hexfiend.com

* HexFiend - a hex editor, but with "binary templates" feature : https://github.com/HexFiend/HexFiend

First we need to download these three Applications: Hackintool, AWEDIDEditor and HexFiend

For MacOS, I use HexFiend. It has TCL-based binary templates (fairly easy to write) and a CLI launcher (hexf)

https://hexfiend.com

https://github.com/HexFiend/HexFiend

Shout out to Hex Fiend! My favorite feature is the template system[0]. It makes it much easier to figure out file formats for which you have no documentation. You write a little tcl code to describe the parts of the format you understand as you go.

[0] https://github.com/HexFiend/HexFiend/tree/master/templates

I recently made a visualization template of ZIP file contents for HexFiend. The format is certainly wonky, and some writers (I’m looking at you, macOS) don’t get it quite right: https://github.com/HexFiend/HexFiend/blob/master/templates/A...

Hex Fiend - Fast, open source, hex editor for macOS with support for viewing binary diffs.

The topo sort means we'll write [100, 200) first, so its source data is not overwritten.

Here is Hex Fiend's B+tree: https://github.com/HexFiend/HexFiend/blob/master/framework/s...

Example Network Scanner Scapy

In the last installment we looked at IP headers. One thing you might have seen missing is the port numbers. That's pretty important for making an internet connection. Well it turns out that IP tends to encapsulate other protocols (which is why it has protocol as part of the header). In this article we'll be looking at two popular protocols for internet traffic: TCP and UDP. Before we begin though install scapy which we'll be using to make things easier, and dnslib that will be used during the UDP section:

I've coded my small ARP spoofer in Go because I love the language, though it can very well be coded in other languages, for example Python with Scapy.

Scapy: https://github.com/secdev/scapy

Tshark can't do that. The Wireshark app does update its Conversations window pretty frequently when doing a live capture, so that might be a reasonable alternative. Otherwise you could probably also cobble something together yourself with a tool like scapy or some other Python library, but that would clearly be more work.

I don't know if you can do it within the gui, I don't see anything but perhaps a bit of Python code would do it. There is a python library called Scapy that may have functions to help you along the way.