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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Show control-plane host open-ports. Sometimes ip sockets does
not work.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Lelio Fulgenzi
[mailto:lelio@uoguelph.ca] <br>
<b>Sent:</b> Thursday, January 08, 2009 12:48<br>
<b>To:</b> Corbett Enders<br>
<b>Cc:</b> VOIP Group; Ryan West; Ahmed Elnagar<br>
<b>Subject:</b> Re: [cisco-voip] Fraud calls to Cuba - Please read<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:black'>this is very interesting information. our routers are protected
from Internet with ACLs, but I'd like to run that "show sockets"
command anyways. We'll eventually have to configure them to block these ports
anyways.<br>
<br>
does anyone know what that command is? i tried running "show ip
sockets" but it's not available.<br>
<br>
i'm running 12.4(13r)T<br>
<br>
<br>
---<br>
Lelio Fulgenzi, B.A.<br>
Senior Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1<br>
(519) 824-4120 x56354 (519) 767-1060 FAX (JNHN)<br>
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^<br>
"Bad grammar makes me [sic]" - Tshirt<br>
<br>
<br>
----- Original Message -----<br>
From: "Corbett Enders" <cenders@homesbyavi.com><br>
To: "Ryan West" <rwest@zyedge.com>, "Ahmed Elnagar"
<ahmed_elnagar@hotmail.com><br>
Cc: "VOIP Group" <cisco-voip@puck.nether.net><br>
Sent: Thursday, January 8, 2009 12:37:26 PM GMT -05:00 US/Canada Eastern<br>
Subject: Re: [cisco-voip] Fraud calls to Cuba - Please read<br>
<br>
<br>
<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>So it turns out SIP 5060 is open, after running show ip sockets.</span><span
style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'> </span><span style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Interestingly enough, the hacker is connected to me right now
(though we’ve blocked international calls at the telco level).</span><span
style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'> </span><span style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>His IP is 124.217.250.240.</span><span style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'> </span><span style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>If you read this article, <a href="http://www.honeynor.no/"
target="_blank">http://www.honeynor.no/</a>, it describes the attack in detail.
I found the article by searching the phone number initially dialed,
52555169000.</span><span style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'> </span><span style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'> </span><span style='color:black'><o:p></o:p></span></p>
<div>
<div style='border:none;border-top:solid windowtext 1.0pt;padding:3.0pt 0in 0in 0in;
border-color:-moz-use-text-color -moz-use-text-color'>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:black'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:black'> Ryan West [mailto:rwest@zyedge.com] <br>
<b>Sent:</b> Wednesday, January 07, 2009 9:50 PM<br>
<b>To:</b> Ahmed Elnagar; Corbett Enders<br>
<b>Cc:</b> VOIP Group<br>
<b>Subject:</b> RE: [cisco-voip] Fraud calls to Cuba - Please read</span><span
style='color:black'><o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><span style='color:black'> <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>If the router is connected to the Internet, both H323 TCP/1720
and SIP UDP/5060 need to blocked. I don’t remember the command offhand,
but on some versions of code it is show ip sockets. Check this out to
actually disable default SIP and H323 processing:</span><span style='color:
black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'> </span><span style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><a
href="https://supportwiki.cisco.com/ViewWiki/index.php/How_to_disable_H.323_and_Session_Initiation_Protocol_%28SIP%29_services_on_TCP_ports_1720_and_5060_of_a_IOS_gateway_router"
target="_blank">https://supportwiki.cisco.com/ViewWiki/index.php/How_to_disable_H.323_and_Session_Initiation_Protocol_(SIP)_services_on_TCP_ports_1720_and_5060_of_a_IOS_gateway_router</a></span><span
style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>-ryan</span><span style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'> </span><span style='color:black'><o:p></o:p></span></p>
<div>
<div style='border:none;border-top:solid windowtext 1.0pt;padding:3.0pt 0in 0in 0in;
border-color:-moz-use-text-color -moz-use-text-color'>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:black'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:black'> cisco-voip-bounces@puck.nether.net [mailto:cisco-voip-bounces@puck.nether.net]
<b>On Behalf Of </b>Ahmed Elnagar<br>
<b>Sent:</b> Wednesday, January 07, 2009 23:13<br>
<b>To:</b> cenders@homesbyavi.com<br>
<b>Cc:</b> VOIP Group<br>
<b>Subject:</b> Re: [cisco-voip] Fraud calls to Cuba - Please read</span><span
style='color:black'><o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><span style='color:black'> <o:p></o:p></span></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:10.0pt;
font-family:"Verdana","sans-serif";color:black'><br>
Wow...exaclty the same problem I had...but with PRI...I have a site in Egypt
that the user called us one day and informed that he has a bill from the Teleco
for 100,000$ for a period of 3 months and they never produce this amount of
calls...all calls were for random numbers and the call never exceeded 1 minute
and these random numbers happen to be starting with 00 which is the
internationl prefix here in Egypt.<br>
<br>
After long nights of troubleshootting...I found that the gateway was configured
to register SIP phones from the internet and I found an IP address from Mexico
city that is trying this random calls so frequent, the strange thing is that
the gateway was accepting these calls and route it to H323 side which relay the
call to the PRI.<br>
<br>
I did the following to ensure that it will not happen again...removed SIP at
all from the gateway...converted the gateway to MGCP so that every call that
will pass the gateway will need signalling from Callmanager and will leave a
record in the CDR. But the strange thing the problem contiuned...<br>
<br>
During troubleshooting we noticed something strange...alot of incoming calls
coming to the PRI from a certain local number...and it was 3 AM in the morning
we called this number and he told us that he know no one in this site and he
has a problem that he got high invoices from the Teleco too...so we come up
with this conculsion...seems that the CO. equipments has some problems and it
is generating calls on behalf of the user to random numbers...a strange thing I
know but till now this company still going to discussions with the teleco to
solve this problem.<br>
<br>
I suggest to do the followin...try to review CDR files and have a detailed bill
from your Teleco and try to compare these calls with the CDR calls maybe this
would help you...also try to activate some debugs and show commands "there
is some tools that can automate show command every 5 mins or so" to know
exactly when these calls happen and what is the source of it.<br>
<br>
Good luck with this strange issue.</span><span style='color:black'><o:p></o:p></span></p>
<div>
<p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:10.0pt;
font-family:"Verdana","sans-serif";color:black'>Thanks,<br>
Ahmed Elnagar</span><span style='color:black'><o:p></o:p></span></p>
<div class=MsoNormal align=center style='text-align:center'><span
style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:black'>
<hr size=2 width="100%" align=center>
</span></div>
<p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:10.0pt;
font-family:"Verdana","sans-serif";color:black'>From: cenders@homesbyavi.com<br>
To: cisco-voip@puck.nether.net<br>
Date: Wed, 7 Jan 2009 20:26:56 -0700<br>
Subject: [cisco-voip] Fraud calls to Cuba - Please read</span><span
style='color:black'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:black'>Hello List,</span><span style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:black'> </span><span style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:#1F497D'>I’ve got a situation with 2 remote sites. Over the course
of several days in late November, somehow the analog POTS line in the site
(which we use for SRST backup) proceeded to make approx 4,940 calls to
Cuba. There wasn’t really a pattern to the calls. It started with a
couple of repeated calls to the same number and from that point, the dialed
number changed (not dialed in any sort of sequential pattern either).
Calls varied in duration from 0 seconds to many minutes long. Sometimes
the next call would happen right away and other times there would be several
minutes delay between calls. This proceeded to occur over the course of
about a day and a half until the POTS provider called us and we blocked the
line.</span><span style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:#1F497D'> </span><span style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:#1F497D'>The analog line in the show home serves 2 purposes. It is
connected to the SRST FXO port on the Cisco 2801 router and also connects to
the analog fax machine.</span><span style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:#1F497D'> </span><span style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:#1F497D'>At this point, the POTS provider feels that somehow the 2801
router has been compromised and is being used to route calls out the FXO
port. We have a cordless phone on an ATA, and at first they felt this was
the source but I indicated that any calls from the cordless phone would leave
through our PRI in the main office, through the phone line on the FXO port.</span><span
style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:#1F497D'> </span><span style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:#1F497D'>Even if someone had managed to guess our admin password for the
console of the router, I don’t believe that person sitting on the Internet
would be able to get a call to connect from their computer, through the
Internet, and leave out our FXO port in our site.</span><span style='color:
black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:#1F497D'> </span><span style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:#1F497D'>I’m wondering if anyone on the list has some thoughts as to how
the system could have been compromise or if it just isn’t possible. The
POTS line is actually a digital line provided by Shaw (a local cable/telco in
Alberta). I feel that their “digital” phone terminal has been compromised
though it isn’t connected to the Internet in any way. One other
possibility is old school phone phreaking where someone has actually tapped
into the physical line but they would have been sitting outside in the cold for
a very long time making these crazy calls.</span><span style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:#1F497D'> </span><span style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:#1F497D'>I look forward to any insight the collective brain power of this
list can provide. The bill for these calls is over $6000.</span><span
style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:#1F497D'> </span><span style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:#1F497D'>Regards,</span><span style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:#1F497D'>Corbett Enders.</span><span style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:#1F497D'> </span><span style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><b><span style='font-family:"Arial","sans-serif";color:black'>Corbett
Enders</span></b><span style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:black'>Network Manager<br>
Homes by Avi - 2007 Canadian Builder of the Year.<br>
Tel: (403) 536-7170<br>
Fax: (403) 536-7171<br>
</span><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:black'><a href="http://www.homesbyavi.com/" target="_blank"><span
style='font-family:"Arial","sans-serif"'>www.homesbyavi.com</span></a></span><span
style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'> </span><span
style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:black'> </span><span style='color:black'><o:p></o:p></span></p>
</div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:black'> </span><span style='color:black'><o:p></o:p></span></p>
<div class=MsoNormal align=center style='text-align:center'><span
style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:black'>
<hr size=2 width="100%" align=center>
</span></div>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:black'>check out the rest of the Windows Live™. More than mail–Windows
Live™ goes way beyond your inbox. <a
href="http://www.microsoft.com/windows/windowslive/" target="_blank">More than
messages</a></span><span style='color:black'><o:p></o:p></span></p>
<p><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>No
virus found in this incoming message.<br>
Checked by AVG - http://www.avg.com<br>
Version: 8.0.176 / Virus Database: 270.10.4/1880 - Release Date: 1/7/2009 8:49
AM</span><span style='color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:black'><br>
_______________________________________________ cisco-voip mailing list
cisco-voip@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-voip <o:p></o:p></span></p>
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