Thanks Chich. I added a bit and put these up on bleedingsnort:
alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"BLEEDING-EDGE
Policy Skype VOIP Checking Version (Startup)"; uricontent:"/ui/";
nocase; uricontent:"/en/getlatestversion?ver="; nocase;
classtype:policy-violation;
reference:url,http://www1.cs.columbia.edu/~library/TR-r
epository/reports/reports-2004/cucs-039-04.pdf; sid:2001595; rev:1;)
alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"BLEEDING-EDGE
Policy Skype VOIP Reporting Install"; uricontent:"/ui/"; nocase; u
ricontent:"/en/installed"; nocase; classtype:policy-violation;
reference:url,http://www1.cs.columbia.edu/~library/TR-repository/reports/rep
orts-2004/cucs-039-04.pdf; sid:2001596; rev:1;)
I worry about the first and falses a bit, so please let us know if you
see any. That getlatestversion string and ui could be used in a lot of
places.
Matt
Chich Thierry wrote:
This a short and badly written rule that detect when skype check fo a new
version - ie when it is launched. I didn't make the choice to precise the
destination address: it is 212.72.49.131, but it could easily change.
alert tcp $HOME_NET any -> !$HOME_NET 80 (msg:"Skype get latest version";
content:"GET";content:"getlatestversion?ver=";classtype:policy-violation;
reference:url,http://www1.cs.columbia.edu/~library/TR-repository/reports/reports-2004/cucs-039-04.pdf
;)
Regards,
Thierry Chich
-------------------------------------------------------
SF email is sponsored by - The IT Product Guide
Read honest & candid reviews on hundreds of IT Products from real users.
Discover which products truly live up to the hype. Start reading now.
http://productguide.itmanagersjournal.com/
_______________________________________________
Snort-sigs mailing list
Snort-sigs@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/snort-sigs
--
--------------------------------------------
Matthew Jonkman, CISSP
Senior Security Engineer
Infotex
765-429-0398 Direct Anytime
765-448-6847 Office
866-679-5177 24x7 NOC
my.infotex.com
www.offsitefilter.com
--------------------------------------------
NOTICE: The information contained in this email is confidential
and intended solely for the intended recipient. Any use,
distribution, transmittal or retransmittal of information
contained in this email by persons who are not intended
recipients may be a violation of law and is strictly prohibited.
If you are not the intended recipient, please contact the sender
and delete all copies.
-------------------------------------------------------
SF email is sponsored by - The IT Product Guide
Read honest & candid reviews on hundreds of IT Products from real users.
Discover which products truly live up to the hype. Start reading now.
http://productguide.itmanagersjournal.com/
_______________________________________________
Snort-sigs mailing list
Snort-sigs@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/snort-sigs
