alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET USER_AGENTS Suspicious User-Agent (C slash)"; flow:established,to_server; content:"User-Agent|3a| C|3a 5c|"; http_header; fast_pattern; content:!"|5c|Citrix|5c|"; http_header; content:!"|5c|Panda S"; nocase; http_header; content:!"|5c|Mapinfo"; http_header; nocase; threshold:type limit,count 2,track by_src,seconds 300; metadata: former_category TROJAN; classtype:trojan-activity; sid:2008512; rev:17; metadata:affected_product Any, attack_target Client_Endpoint, deployment Perimeter, tag User_Agent, signature_severity Major, created_at 2010_07_30, updated_at 2017_10_30;)

Added 2017-10-30 18:17:34 UTC


alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET USER_AGENTS Suspicious User-Agent (C slash)"; flow:established,to_server; content:"User-Agent|3a| C|3a 5c|"; http_header; fast_pattern; content:!"|5c|Citrix|5c|"; http_header; content:!"|5c|Panda S"; nocase; http_header; content:!"|5c|Mapinfo"; http_header; nocase; threshold:type limit,count 2,track by_src,seconds 300; metadata: former_category TROJAN; classtype:trojan-activity; sid:2008512; rev:17; metadata:affected_product Any, attack_target Client_Endpoint, deployment Perimeter, tag User_Agent, signature_severity Major, created_at 2010_07_30, updated_at 2017_10_30;)

Added 2017-10-30 16:39:42 UTC


alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET TROJAN Suspicious User-Agent (C slash)"; flow:established,to_server; content:"User-Agent|3a| C|3a 5c|"; http_header; fast_pattern; content:!"|5c|Citrix|5c|"; http_header; content:!"|5c|Panda S"; nocase; http_header; content:!"|5c|Mapinfo"; http_header; nocase; threshold:type limit,count 2,track by_src,seconds 300; classtype:trojan-activity; sid:2008512; rev:16; metadata:affected_product Any, attack_target Client_Endpoint, deployment Perimeter, tag User_Agent, signature_severity Major, created_at 2010_07_30, updated_at 2016_07_01;)

Added 2017-08-07 21:01:40 UTC


alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET TROJAN Suspicious User-Agent (C slash)"; flow:established,to_server; content:"User-Agent|3a| C|3a 5c|"; http_header; fast_pattern; content:!"|5c|Citrix|5c|"; http_header; content:!"|5c|Panda S"; nocase; http_header; content:!"|5c|Mapinfo"; http_header; nocase; threshold:type limit,count 2,track by_src,seconds 300; classtype:trojan-activity; sid:2008512; rev:16;)

Added 2015-07-23 11:10:55 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET TROJAN Suspicious User-Agent (C slash)"; flow:established,to_server; content:"User-Agent|3a| C|3a 5c|"; http_header; content:!"|5c|Citrix|5c|ICA"; http_header; content:!"|5c|Panda S"; nocase; http_header; content:!"|5c|Mapinfow"; http_header; nocase; threshold:type limit,count 2,track by_src,seconds 300; classtype:trojan-activity; sid:2008512; rev:15;)

Added 2014-05-19 20:23:57 UTC

Rule should be < content:!"|5c|Mapinfo" > OR < content:!"|5c|Mapinfor" > without W at the end.

-- ThStu - 2014-10-03

Rule should also handle other Citrix applications, e.g.: C:\Program Files\Citrix\Online Plugin\PNAMAIN.EXE.

So it should have another: content:!"PNAMAIN.EXE"

-- GuH - 2015-07-23

Thanks, I'll get this fixed up today!

-- DarienH - 2015-07-23


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET TROJAN Suspicious User-Agent (C slash)"; flow:established,to_server; content:"User-Agent|3a| C|3a 5c|"; http_header; content:!"|5c|Citrix|5c|ICA"; http_header; content:!"|5c|Panda S"; nocase; http_header; content:!"|5c|Mapinfow"; http_header; nocase; threshold:type limit,count 2,track by_src,seconds 300; classtype:trojan-activity; sid:2008512; rev:15;)

Added 2014-05-19 18:02:22 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET TROJAN Suspicious User-Agent (C slash)"; flow:established,to_server; content:"User-Agent|3a| C|3a 5c|"; http_header; content:!"|5c|Citrix|5c|ICA Client|5c|"; http_header; content:!"|5c|Panda S"; nocase; http_header; content:!"|5c|Mapinfow"; http_header; nocase; threshold:type limit,count 2,track by_src,seconds 300; classtype:trojan-activity; sid:2008512; rev:14;)

Added 2012-04-19 18:16:41 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET TROJAN Suspicious User-Agent (C slash)"; flow:established,to_server; content:"User-Agent|3a| C|3a 5c|"; http_header; content:!"|5c|Citrix|5c|ICA Client|5c|"; http_header; content:!"|5c|Panda S"; http_header; content:!"|5c|Mapinfow"; http_header; nocase; threshold:type limit,count 2,track by_src,seconds 300; classtype:trojan-activity; sid:2008512; rev:13;)

Added 2012-04-16 18:46:08 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET TROJAN Suspicious User-Agent (C slash slash)"; flow:established,to_server; content:"User-Agent|3a| C|3a 5c|"; http_header; content:!"|5c|Citrix|5c|ICA Client|5c|"; http_header; content:!"|5c|Panda S"; http_header; nocase; threshold:type limit,count 2,track by_src,seconds 300; classtype:trojan-activity; sid:2008512; rev:12;)

Added 2011-12-06 21:59:17 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET TROJAN Suspicious User-Agent (C slash slash)"; flow:established,to_server; content:"User-Agent|3a| C|3a 5c|"; http_header; content:!"|5c|Citrix|5c|ICA Client|5c|"; http_header; content:!"|5c|Panda Software|5c|"; http_header; nocase; threshold:type limit,count 2,track by_src,seconds 300; classtype:trojan-activity; sid:2008512; rev:11;)

Added 2011-10-12 19:25:16 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET TROJAN Suspicious User-Agent (C slash slash)"; flow:established,to_server; content:"User-Agent|3a| C|3a 5c|"; http_header; content:!"|5c|Citrix|5c|ICA Client|5c|"; http_header; content:!"|5c|Panda Software|5c|"; http_header; nocase; threshold:type limit,count 2,track by_src,seconds 300; classtype:trojan-activity; sid:2008512; rev:11;)

Added 2011-09-12 16:16:06 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET TROJAN Suspicious User-Agent (C slash slash)"; flow:established,to_server; content:"User-Agent|3a| C|3a 5c|"; http_header; content:!"|5c|Citrix|5c|ICA Client|5c|"; http_header; content:!"|5c|Panda Software|5c|"; http_header; threshold:type limit,count 2,track by_src,seconds 300; classtype:trojan-activity; reference:url,doc.emergingthreats.net/bin/view/Main/2008512; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/USER_AGENTS/USER_AGENTS_Suspicious; sid:2008512; rev:10;)

Added 2011-09-08 21:59:32 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET USER_AGENTS Suspicious User-Agent (C slash slash)"; flow:established,to_server; content:"User-Agent|3a| C|3a|\\"; http_header; content:!"\\Citrix\\ICA Client\\"; http_header; classtype:trojan-activity; reference:url,doc.emergingthreats.net/bin/view/Main/2008512; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/USER_AGENTS/USER_AGENTS_Suspicious; sid:2008512; rev:8;)

Added 2011-02-04 17:27:41 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET USER_AGENTS Suspicious User-Agent (C\:\\)"; flow:established,to_server; content:"|0d 0a|User-Agent\: C\:\\"; content:!"\\Citrix\\ICA Client\\"; classtype:trojan-activity; reference:url,doc.emergingthreats.net/bin/view/Main/2008512; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/USER_AGENTS/USER_AGENTS_Suspicious; sid:2008512; rev:5;)

Added 2009-10-19 09:15:44 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET USER_AGENTS Suspicious User-Agent (C\:\\)"; flow:established,to_server; content:"|0d 0a|User-Agent\: C\:\\"; content:!"\\Citrix\\ICA Client\\"; classtype:trojan-activity; reference:url,doc.emergingthreats.net/bin/view/Main/2008512; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/USER_AGENTS/USER_AGENTS_Suspicious; sid:2008512; rev:5;)

Added 2009-10-19 09:15:44 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET USER_AGENTS Suspicious User-Agent (C\:\\)"; flow:established,to_server; content:"|0d 0a|User-Agent\: C\:\\"; content:!"\\Citrix\\ICA Client\\"; classtype:trojan-activity; reference:url,doc.emergingthreats.net/bin/view/Main/2008512; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/USER_AGENTS/USER_AGENTS_USER_Agents; sid:2008512; rev:4;)

Added 2009-10-02 14:45:39 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET USER_AGENTS Suspicious User-Agent (C\:\\)"; flow:established,to_server; content:"|0d 0a|User-Agent\: C\:\\"; content:!"\\Citrix\\ICA Client\\"; classtype:trojan-activity; reference:url,doc.emergingthreats.net/bin/view/Main/2008512; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/USER_AGENTS/USER_AGENTS_USER_Agents; sid:2008512; rev:4;)

Added 2009-10-02 14:45:39 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET MALWARE Suspicious User-Agent (C\:\\)"; flow:established,to_server; content:"|0d 0a|User-Agent\: C\:\\"; classtype:trojan-activity; reference:url,doc.emergingthreats.net/bin/view/Main/2008512; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/MALWARE/MALWARE_USER_Agents; sid:2008512; rev:2;)

Added 2009-02-09 22:22:08 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET MALWARE Suspicious User-Agent (C\:\\)"; flow:established,to_server; content:"|0d 0a|User-Agent\: C\:\\"; classtype:trojan-activity; sid:2008512; rev:1;)

Added 2008-08-19 18:13:45 UTC


Topic revision: r4 - 2015-07-23 - DarienH
 
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