alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET MALWARE Viper Spyware User Agent (Viper 4.0)"; flow: established,to_server; content:"User-Agent\:"; nocase; pcre:"/User-Agent\:[^\n]+Viper\(/i"; classtype:trojan-activity; reference:url,doc.emergingthreats.net/bin/view/Main/2007287; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/MALWARE/MALWARE_USER_Agents; sid:2007287; rev:3;)

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

alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET MALWARE Viper Spyware User Agent (Viper 4.0)"; flow: established,to_server; content:"User-Agent\:"; nocase; pcre:"/User-Agent\:[^\n]+Viper\(/i"; classtype:trojan-activity; reference:url,doc.emergingthreats.net/bin/view/Main/2007287; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/MALWARE/MALWARE_USER_Agents; sid:2007287; rev:3;)

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

alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET MALWARE Viper Spyware User Agent (Viper 4.0)"; flow: established,to_server; content:"User-Agent\:"; nocase; pcre:"/User-Agent\:[^\n]+Viper\(/i"; classtype:trojan-activity; reference:url,doc.emergingthreats.net/bin/view/Main/2007287; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/MALWARE/MALWARE_USER_Agents; sid:2007287; rev:3;)

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

alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET MALWARE Viper Spyware User Agent (Viper 4.0)"; flow: established,to_server; content:"User-Agent\:"; nocase; pcre:"/User-Agent\:[^\n]+Viper\(/i"; classtype:trojan-activity; reference:url,doc.emergingthreats.net/bin/view/Main/2007287; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/MALWARE/MALWARE_USER_Agents; sid:2007287; rev:3;)

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

alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET MALWARE Viper Spyware User Agent (Viper 4.0)"; flow: established,to_server; content:"User-Agent\:"; nocase; pcre:"/User-Agent\:[^\n]+Viper\(/i"; classtype:trojan-activity; sid:2007287; rev:2;)

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

alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET MALWARE Viper Spyware User Agent (Viper 4.0)"; flow: established,to_server; content:"User-Agent\:"; nocase; pcre:"/User-Agent\:[^\n]+Viper\(/i"; classtype:trojan-activity; sid:2007287; rev:2;)

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

alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"BLEEDING-EDGE MALWARE Viper Spyware User Agent (Viper 4.0)"; flow: established,to_server; content:"User-Agent\:"; nocase; pcre:"/User-Agent\:[^\n]+Viper\(/i"; classtype:trojan-activity; sid:2007287; rev:1;)

Added 2007-08-29 09:46:49 UTC

From the Sandnet Analysis

-- ShirkDog? - 30 Aug 2007