Application level pentesting

From: intel96 (intel96@bellsouth.net)
Date: Fri Jun 30 2006 - 12:42:40 EDT


To all,

I am pentesting an application that is written in several languages but
is complied into a single application. So looking at the application
with FxCop or Reflector for .NET apps does not work.

The application draws an image on the screen that cannot be moved. The
image has two values username and password. The application only
accepts mouse entries on a virtual keyboard, which rotates every 60
seconds. The application form fields which are masked with "*" cannot
be read with applications like Foundstone's Showin. Microsoft Spy++
does cannot see the values in the form fields once they are entered.

The application writes nothing to the registry that can be used.

The application uses the following items when running:

1. InternetFortezzaCard - part of WININET.dll
2. InternetInitializedAutoProxyDll - part of WININET.dll
3. MSWSOCK.dll
4. USER32.dll
5. Kernel32.dll

Sending random data to the open UDP (Foundstone UDPflood) and TCP
(Foundstone Blast) ports does not crash the application.

Cramming random data into the username field does nothing.

Does anyone have any recommendations on how to pentest the application
deeper?

Thanks,

Intel96

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