Sunday, March 13, 2011

[new tool announcement] host-extract

Host-Extract | Host/IP Pattern Extractor
category: /pentest/enumeration/www
useful area: blackbox testing

This little ruby script tries to extract all IP/Host patterns in page
response of a given URL and JavaScript/CSS files of that URL.
With it, you can quickly identify internal IPs/Hostnames, development
IPs/ports, cdn, load balancers, additional attack entries related to
your target that are revealed in inline js, css, html comment areas
and js/css files.
This is unlike web crawler which looks for new links only in anchor
tags (<a) or the like.
In some cases, host-extract may give you false positives when there
are some words like - main-site_ver_10.2.1.3.swf.
With -v option, you can ask the tool to output html view-source
snippets for each IP/Domain extracted. This will shorten your manual
analysis time.
Please go to for more info.

svn co host-extract

Tutorial Wiki
Sebastien Damaye from has prepared a thorough host-extract
tutorial with real-world famous web sites.

Bugs/Suggestions Report
Please report bugs/suggestions to host-extract at
Thanks for your contribution.