[Snort-sigs] Banload sigs

Y M snort at ...3751...
Thu Sep 26 10:28:34 EDT 2013


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 at ...3751...
To: snort-sigs at 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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