alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET MALWARE User-Agent (single dash)"; flow:to_server,established; content:"User-Agent|3a| |2d 0d 0a|"; http_header; reference:url,doc.emergingthreats.net/bin/view/Main/2007880; classtype:trojan-activity; sid:2007880; rev:5;)

Added 2011-12-15 18:09:30 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET USER_AGENTS Suspicious User Agent (single dash)"; flow:to_server,established; content:"User-Agent|3a| |2d 0d 0a|"; http_header; reference:url,doc.emergingthreats.net/bin/view/Main/2007880; classtype:trojan-activity; sid:2007880; rev:5;)

Added 2011-10-12 19:24:00 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET USER_AGENTS Suspicious User Agent (single dash)"; flow:to_server,established; content:"User-Agent|3a| |2d 0d 0a|"; http_header; classtype:trojan-activity; reference:url,doc.emergingthreats.net/bin/view/Main/2007880; sid:2007880; rev:5;)

Added 2011-09-14 22:37:29 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET USER_AGENTS Suspicious User Agent (single dash)"; flow:to_server,established; content:"User-Agent|3a| |2d 0d 0a|"; http_header; classtype:trojan-activity; reference:url,doc.emergingthreats.net/bin/view/Main/2007880; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/USER_AGENTS/USER_AGENTS_Suspicious; sid:2007880; rev:5;)

Added 2011-02-04 17:26:58 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET USER_AGENTS Suspicious User Agent (single dash)"; flow:to_server,established; content:"|0d 0a|User-Agent\: |2d 0d 0a|"; classtype:trojan-activity; reference:url,doc.emergingthreats.net/bin/view/Main/2007880; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/USER_AGENTS/USER_AGENTS_Suspicious; sid:2007880; rev:3;)

Added 2010-07-10 10:31:05 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET USER_AGENTS Suspicious User Agent (single dash)"; flow:to_server,established; content:"|0d 0a|User-Agent\: |2d 0d 0a|"; classtype:trojan-activity; reference:url,doc.emergingthreats.net/bin/view/Main/2007880; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/USER_AGENTS/USER_AGENTS_Suspicious; sid:2007880; rev:3;)

Added 2010-07-10 10:31:05 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET TROJAN Suspicious User-Agent - Possible Trojan Downloader (-)"; flow:established,to_server; content:"|0d 0a|User-Agent\: -|0d 0a|"; nocase; classtype: trojan-activity; reference:url,doc.emergingthreats.net/2007880; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/VIRUS/TROJAN_Downloader_General; sid:2007880; rev:2;)

Added 2009-02-12 18:21:15 UTC

FPs with www.cbox.ws :

GET /box/?boxid=3446522&boxtag=jfwzrx&sec=ar&p=230513&c=1270679638 HTTP/1.1 Accept: / Accept-Language: en-nz Connection: Close User-Agent: - ........

-- RussellFulton - 08 Apr 2010


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET TROJAN Suspicious User-Agent - Possible Trojan Downloader (-)"; flow:established,to_server; content:"|0d 0a|User-Agent\: -|0d 0a|"; nocase; classtype: trojan-activity; reference:url,doc.emergingthreats.net/2007880; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/VIRUS/TROJAN_Downloader_General; sid:2007880; rev:2;)

Added 2009-02-12 18:21:15 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET TROJAN Suspicious User-Agent - Possible Trojan Downloader (-)"; flow:established,to_server; content:"|0d 0a|User-Agent\: -|0d 0a|"; nocase; classtype: trojan-activity; sid:2007880; rev:1;)

Added 2008-02-24 00:35:10 UTC

At our site I'm seeing a ton of alarms on a site "www.coolwebchat.com" at 216.75.63.79:80 -- I believe these are all legitimate chat room stuff.

A bad choice for a user agent string.

-- RegQuinton - 04 Apr 2008


Topic revision: r3 - 2010-04-08 - RussellFulton
 
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