Re: Banload sigs

[Y M <snort () outlook com>]

Thanks to Rmkml, the content modifier of the second content match in the last rule should read http_header and not 
http_uri. Thanks.

From: snort () outlook com
To: snort-sigs () lists sourceforge net
Date: Thu, 26 Sep 2013 13:51:38 +0000
Subject: [Snort-sigs] Banload sigs




The reference is in Spanish, so mind not my bad translation of the alerts' msgs. Quick and dirty signature:
alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"MALWARE-CNC Win.Trojan.Banload outbound connection attempt"; 
flow:to_server,established; content:"/v22/mutabixa/"; fast_pattern:only; http_uri; metadata:impact_flag red, policy 
balanced-ips drop, policy security-ips drop, ruleset community, service http; 
reference:url,www.nyxbone.com/malware/banload.html; classtype:trojan-activity; sid:100049; rev:1;)
alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"MALWARE-CNC Win.Trojan.Banload information upload attempt"; 
flow:to_server,established; content:"/v22/mutabixa/1nf3ct/"; http_uri; content:"chave="; distance:0; http_uri; 
content:"&url="; distance:0; http_uri; metadata:impact_flag red, policy balanced-ips drop, policy security-ips drop, 
ruleset community, service http; reference:url,www.nyxbone.com/malware/banload.html; classtype:trojan-activity; 
sid:100050; rev:1;)
alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"MALWARE-CNC Win.Trojan.Banload download attempt"; 
flow:to_server,established; content:".jpg"; http_uri; content:"User-Agent|3A| runddll32.exe"; fast_pattern:only; 
http_uri; metadata:impact_flag red, policy balanced-ips drop, policy security-ips drop, ruleset community, service 
http; reference:url,www.nyxbone.com/malware/banload.html; classtype:trojan-activity; sid:100051; rev:1;)
Any help/corrections is appreciated.Thanks.YM                                     

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Free Intel webinars can help you accelerate application performance.
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the latest Intel processors and coprocessors. See abstracts and register >
http://pubads.g.doubleclick.net/gampad/clk?id=60133471&iu=/4140/ostg.clktrk

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