Watcher – Passive Analysis Tool For HTTP Web Applications

Keep on Guard!

Watcher is a run time passive-analysis tool for HTTP-based Web applications. Watcher provides pen-testers hot-spot detection for vulnerabilities, developers quick sanity checks, and auditors PCI compliance auditing. It looks for issues related to mashups, user-controlled payloads, cookies, comments, HTTP headers, SSL, Flash, Silverlight, referrer leaks, information disclosure, Unicode, and more.

Major Features:

  1. Passive detection of security, privacy, and PCI compliance issues in HTTP, HTML, Javascript, and CSS
  2. Works seamlessly with complex Web 2.0 applications while you drive the Web browser
  3. Non-intrusive, will not raise alarms or damage production sites
  4. Real-time analysis and reporting – findings are reported as they’re found, exportable to XML
  5. Configurable domains with wildcard support
  6. Extensible framework for adding new checks

Watcher is built as a plugin for the Fiddler HTTP debugging proxy available at Watcher works seamlessly with today’s complex Web 2.0 applications by running silently in the background while you drive your browser and interact with the Web-application.

Watcher is built in C# as a small framework with 30+ checks already included. It’s built so that new checks can be easily created to perform custom audits specific to your organizational policies, or to perform more general-purpose security assessments.

You can download Watcher here:

Or read more here.

Posted in: Hacking Tools, Web Hacking

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2 Responses to Watcher – Passive Analysis Tool For HTTP Web Applications

  1. Mozilla Fanboy April 13, 2009 at 11:14 am #


    nice n all, but how about a port to firebug for us non-MS users?


  2. Jack April 18, 2009 at 8:20 am #

    There might be a setting to change the port