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RE: RAS Gurus
From: "Nick Besant" <Nick.Besant () ioko com>
Date: Fri, 21 Apr 2006 15:36:14 +0100

-----Original Message-----
From: Mohamed Abdel Kader [mailto:mak.pen () gmail com] 
Sent: 20 April 2006 13:10
To: pen-test () securityfocus com
Subject: RAS Gurus

Good day everyone,

Been war dialing a number and every time I connect it doesn't 
send me a prompt to try to log onto the system.  I couldn't 
identify the system responding.

THC scan simply reported that it detected a carrier... Not 
that useful in my case. I need to identify the system and try 
to connect with the respective client. And possibly 
bruteforce the device once the login screen shows.

 

Tried pcanywhere and carbon copy as clients and still no 
information was disclosed.

 

Any ideas gurus out there??


No guru, but I'll try :)

If you've actually established a connection but aren't getting any data
through, it's worth trying to send a range of control characters (or
even trying just normal characters or strings) through something like
tip (or HyperTerminal on Windows).  You may also find that nothing
obvious works; it could be a callback service.  If that's the case you
could try disconnecting and dialling back immediately to see if you get
a busy tone -obviously that won't apply for multiple lines - but it
might give you a start point.  If you've got additional information as
part of a larger pentest it might help identify what you'd expect to be
listening.  There's always the possibility it's a backdoor/maintenance
number/alarm system of some kind as well.

Nick Besant


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