alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE NavExcel? Spyware User-Agent (NavHelper?)"; flow:to_server,established; content:"User-Agent|3a| NavHelper?"; nocase; http_header; reference:url,doc.emergingthreats.net/2005321; classtype:trojan-activity; sid:2005321; rev:8; metadata:attack_target Client_Endpoint, deployment Perimeter, tag Spyware_User_Agent, signature_severity Minor, created_at 2010_07_30, updated_at 2016_07_01;)

Added 2017-08-07 20:58:30 UTC

alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET MALWARE NavExcel? Spyware User-Agent (NavHelper?)"; flow:to_server,established; content:"User-Agent|3a| NavHelper?"; nocase; http_header; reference:url,doc.emergingthreats.net/2005321; classtype:trojan-activity; sid:2005321; rev:7;)

Added 2011-12-15 18:09:23 UTC

alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET USER_AGENTS NavExcel? Spyware User-Agent (NavHelper?)"; flow:to_server,established; content:"User-Agent|3a| NavHelper?"; nocase; http_header; reference:url,doc.emergingthreats.net/2005321; classtype:trojan-activity; sid:2005321; rev:7;)

Added 2011-10-12 19:17:55 UTC

alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET USER_AGENTS NavExcel? Spyware User-Agent (NavHelper?)"; flow:to_server,established; content:"User-Agent|3a| NavHelper?"; nocase; http_header; classtype:trojan-activity; reference:url,doc.emergingthreats.net/2005321; sid:2005321; rev:7;)

Added 2011-09-14 22:31:09 UTC

alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET USER_AGENTS NavExcel? Spyware User-Agent (NavHelper?)"; flow:to_server,established; content:"User-Agent|3a| NavHelper?"; nocase; http_header; classtype:trojan-activity; reference:url,doc.emergingthreats.net/2005321; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/USER_AGENTS/USER_AGENTS_Navhelper; sid:2005321; rev:7;)

Added 2011-02-04 17:24:11 UTC

alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET USER_AGENTS NavExcel? Spyware User-Agent (NavHelper?)"; flow:to_server,established; content:"User-Agent\: NavHelper?"; nocase; classtype:trojan-activity; reference:url,doc.emergingthreats.net/2005321; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/USER_AGENTS/USER_AGENTS_Navhelper; sid:2005321; rev:5;)

Added 2009-11-25 11:39:03 UTC

alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET USER_AGENTS NavExcel? Spyware User-Agent (NavHelper?)"; flow:to_server,established; content:"User-Agent\: NavHelper?"; nocase; classtype:trojan-activity; reference:url,doc.emergingthreats.net/2005321; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/USER_AGENTS/USER_AGENTS_Navhelper; sid:2005321; rev:5;)

Added 2009-11-25 11:39:03 UTC

alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET MALWARE NavExcel? Spyware User-Agent (NavHelper?)"; flow:to_server,established; content:"User-Agent\: NavHelper?"; nocase; classtype:trojan-activity; reference:url,doc.emergingthreats.net/bin/view/Main/2005321; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/MALWARE/MALWARE_USER_Agents; sid:2005321; rev:3;)

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

alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET MALWARE NavExcel? Spyware User-Agent (NavHelper?)"; flow:to_server,established; content:"User-Agent\: NavHelper?"; nocase; classtype:trojan-activity; reference:url,doc.emergingthreats.net/bin/view/Main/2005321; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/MALWARE/MALWARE_USER_Agents; sid:2005321; rev:3;)

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

alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET MALWARE NavExcel? Spyware User-Agent (NavHelper?)"; flow:to_server,established; content:"User-Agent\: NavHelper?"; nocase; classtype:trojan-activity; reference:url,doc.emergingthreats.net/bin/view/Main/2005321; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/MALWARE/MALWARE_USER_Agents; sid:2005321; rev:3;)

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

alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET MALWARE NavExcel? Spyware User-Agent (NavHelper?)"; flow:to_server,established; content:"User-Agent\: NavHelper?"; nocase; classtype:trojan-activity; reference:url,doc.emergingthreats.net/bin/view/Main/2005321; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/MALWARE/MALWARE_USER_Agents; sid:2005321; rev:3;)

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

alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET MALWARE NavExcel? Spyware User-Agent (NavHelper?)"; flow:to_server,established; content:"User-Agent\: NavHelper?"; nocase; classtype:trojan-activity; sid:2005321; rev:2;)

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

alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET MALWARE NavExcel? Spyware User-Agent (NavHelper?)"; flow:to_server,established; content:"User-Agent\: NavHelper?"; nocase; classtype:trojan-activity; sid:2005321; rev:2;)

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

alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"BLEEDING-EDGE MALWARE NavExcel? Spyware User-Agent (NavHelper?)"; flow:to_server,established; content:"User-Agent\: NavHelper?"; nocase; classtype:trojan-activity; sid:2005321; rev:1;)

Added 2007-06-15 14:16:08 UTC

From the spyware listening post data.

-- ShirkDog? - 20 Jul 2007