Snort mailing list archives

Re: Quick Android/Fakelash.A!tr.spy sig


From: James Lay <jlay () slave-tothe-box net>
Date: Mon, 24 Sep 2012 12:12:03 -0600


On Sep 24, 2012, at 11:40 AM, Joel Esler <jesler () sourcefire com> wrote:

James,

It looks like the sections you wrote your sig off of are the text message and the phone number from the phone being 
sent, this would change every time.  So given the information I have I wrote the following:

alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"MALWARE-CNC Android/Fakelash.A!tr.spy trojan command and 
control channel traffic"; flow:to_server,established; content:"/data.php?action="; http_uri; nocase; content:"&m="; 
nocase; http_uri; distance:0; content:"&p="; http_uri; nocase; distance:0; content:"&n="; http_uri; nocase; 
distance:0; metadata:policy security-ips drop, service http; 
reference:url,http://blog.fortiguard.com/android-malware-distributed-by-malicious-sms-in-france/; 
classtype:trojan-activity;)


Please let me know how that works out.

--
Joel Esler
Senior Research Engineer, VRT
OpenSource Community Manager
Sourcefire

On Sep 21, 2012, at 5:14 PM, James Lay <jlay () slave-tothe-box net> wrote:


Thanks Joel…leave it to me to focus on the wrong element 8-|  I'll let you know what I see.

James

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