alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Suspicious User-Agent (update)"; flow:to_server,established; content:"User-Agent|3a| update|0d 0a|"; http_header; threshold: type limit, count 3, seconds 300, track by_src; reference:url,doc.emergingthreats.net/2003583; classtype:trojan-activity; sid:2003583; rev:11; 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 20:56:49 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET MALWARE Suspicious User-Agent (update)"; flow:to_server,established; content:"User-Agent|3a| update|0d 0a|"; http_header; threshold: type limit, count 3, seconds 300, track by_src; reference:url,doc.emergingthreats.net/2003583; classtype:trojan-activity; sid:2003583; rev:10;)

Added 2011-12-15 18:09:20 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET USER_AGENTS Suspicious User-Agent (update)"; flow:to_server,established; content:"User-Agent|3a| update|0d 0a|"; http_header; threshold: type limit, count 3, seconds 300, track by_src; reference:url,doc.emergingthreats.net/2003583; classtype:trojan-activity; sid:2003583; rev:10;)

Added 2011-10-12 19:13:44 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET USER_AGENTS Suspicious User-Agent (update)"; flow:to_server,established; content:"User-Agent|3a| update|0d 0a|"; http_header; threshold: type limit, count 3, seconds 300, track by_src; classtype:trojan-activity; reference:url,doc.emergingthreats.net/2003583; sid:2003583; rev:10;)

Added 2011-09-14 22:26:44 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET USER_AGENTS Suspicious User-Agent (update)"; flow:to_server,established; content:"User-Agent|3a| update|0d 0a|"; http_header; threshold: type limit, count 3, seconds 300, track by_src; classtype:trojan-activity; reference:url,doc.emergingthreats.net/2003583; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/USER_AGENTS/USER_AGENTS_Suspicious; sid:2003583; rev:10;)

Added 2011-05-25 19:28:46 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET USER_AGENTS Suspicious User-Agent (update)"; flow:to_server,established; content:"User-Agent|3a| update|0d 0a|"; http_header; classtype:trojan-activity; reference:url,doc.emergingthreats.net/2003583; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/USER_AGENTS/USER_AGENTS_Suspicious; sid:2003583; rev:8;)

Added 2011-02-04 17:22:34 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET USER_AGENTS Suspicious User-Agent (update)"; flow:to_server,established; content:"User-Agent\: update|0d 0a|"; classtype:trojan-activity; reference:url,doc.emergingthreats.net/2003583; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/USER_AGENTS/USER_AGENTS_Suspicious; sid:2003583; rev:6;)

Added 2009-10-19 09:15:43 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET USER_AGENTS Suspicious User-Agent (update)"; flow:to_server,established; content:"User-Agent\: update|0d 0a|"; classtype:trojan-activity; reference:url,doc.emergingthreats.net/2003583; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/USER_AGENTS/USER_AGENTS_Suspicious; sid:2003583; rev:6;)

Added 2009-10-19 09:15:43 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET MALWARE Suspicious User-Agent (update)"; flow:to_server,established; content:"User-Agent\: update|0d 0a|"; classtype:trojan-activity; reference:url,doc.emergingthreats.net/2003583; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/MALWARE/MALWARE_USER_Agents; sid:2003583; rev:4;)

Added 2009-02-09 21:30:24 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET MALWARE Suspicious User-Agent (update)"; flow:to_server,established; content:"User-Agent\: update|0d 0a|"; classtype:trojan-activity; reference:url,doc.emergingthreats.net/2003583; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/MALWARE/MALWARE_USER_Agents; sid:2003583; rev:4;)

Added 2009-02-09 21:30:24 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET MALWARE Suspicious User-Agent (update)"; flow:to_server,established; content:"User-Agent\: update|0d 0a|"; classtype:trojan-activity; reference:url,doc.emergingthreats.net/2003583; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/MALWARE/MALWARE_USER_Agents; sid:2003583; rev:4;)

Added 2009-02-09 21:29:25 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET MALWARE Suspicious User-Agent (update)"; flow:to_server,established; content:"User-Agent\: update|0d 0a|"; classtype:trojan-activity; reference:url,doc.emergingthreats.net/2003583; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/MALWARE/MALWARE_USER_Agents; sid:2003583; rev:4;)

Added 2009-02-09 21:29:25 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET MALWARE Suspicious User-Agent (update)"; flow:to_server,established; content:"User-Agent\: update|0d 0a|"; classtype:trojan-activity; reference:url,doc.emergingthreats.net/2003583; sid:2003583; rev:3;)

Added 2008-01-28 17:24:21 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET MALWARE Suspicious User-Agent (update)"; flow:to_server,established; content:"User-Agent\: update|0d 0a|"; classtype:trojan-activity; reference:url,doc.emergingthreats.net/2003583; sid:2003583; rev:3;)

Added 2008-01-28 17:24:21 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"BLEEDING-EDGE MALWARE Suspicious User-Agent (update)"; flow:to_server,established; content:"User-Agent\: update|0d 0a|"; classtype:trojan-activity; reference:url,doc.emergingthreats.net/2003583; sid:2003583; rev:2;)

Added 2008-01-09 17:42:41 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"BLEEDING-EDGE MALWARE Suspicious User-Agent (update)"; flow:to_server,established; content:"User-Agent\: update|0d 0a|"; classtype:trojan-activity; reference:url,doc.emergingthreats.net/2003583; sid:2003583; rev:2;)

Added 2008-01-09 17:42:41 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"BLEEDING-EDGE MALWARE Suspicious User-Agent (update)"; flow:to_server,established; content:"User-Agent\: update|0d 0a|"; classtype:trojan-activity; reference:url,doc.emergingthreats.net/2003583; sid:2003583; rev:2;)

Added 2008-01-09 15:15:19 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"BLEEDING-EDGE MALWARE Suspicious User-Agent (update)"; flow:to_server,established; content:"User-Agent\: update|0d 0a|"; classtype:trojan-activity; reference:url,doc.emergingthreats.net/2003583; sid:2003583; rev:2;)

Added 2008-01-09 15:15:19 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"BLEEDING-EDGE MALWARE Suspicious User-Agent (update)"; flow:to_server,established; content:"User-Agent\: update|0d 0a|"; classtype:trojan-activity; reference:url,doc.emergingthreats.net/2003583; sid:2003583; rev:2;)

Added 2008-01-08 20:25:19 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"BLEEDING-EDGE MALWARE Suspicious User-Agent (update)"; flow:to_server,established; content:"User-Agent\: update|0d 0a|"; classtype:trojan-activity; reference:url,doc.emergingthreats.net/2003583; sid:2003583; rev:2;)

Added 2008-01-08 20:25:19 UTC


alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"BLEEDING-EDGE MALWARE Suspicious User-Agent (update)"; flow:to_server,established; content:"User-Agent\: update|0d 0a|"; classtype:trojan-activity; reference:url,doc.bleedingthreats.net/2003583; sid:2003583; rev:1;)

Added 2007-04-13 13:45:20 UTC

Saw this used by a trojan in downloading new code.

This may occur in some legitimate traffic. Please report any hits like that and we'll negate if possible.

-- MattJonkman - 13 Apr 2007


Topic revision: r2 - 2007-04-13 - MattJonkman
 
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