alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET MALWARE url404.com Spyware User-Agent (Httper)"; flow:to_server,established; content:"User-Agent\: Httper"; nocase; classtype:trojan-activity; reference:url,www.spywareguide.com/product_show.php?id=581; reference:url,doc.emergingthreats.net/bin/view/Main/2003487; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/MALWARE/MALWARE_USER_Agents; sid:2003487; rev:3;)

Added 2009-02-09 21:30:23 UTC

alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET MALWARE url404.com Spyware User-Agent (Httper)"; flow:to_server,established; content:"User-Agent\: Httper"; nocase; classtype:trojan-activity; reference:url,www.spywareguide.com/product_show.php?id=581; reference:url,doc.emergingthreats.net/bin/view/Main/2003487; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/MALWARE/MALWARE_USER_Agents; sid:2003487; rev:3;)

Added 2009-02-09 21:30:23 UTC

alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET MALWARE url404.com Spyware User-Agent (Httper)"; flow:to_server,established; content:"User-Agent\: Httper"; nocase; classtype:trojan-activity; reference:url,www.spywareguide.com/product_show.php?id=581; reference:url,doc.emergingthreats.net/bin/view/Main/2003487; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/MALWARE/MALWARE_USER_Agents; sid:2003487; rev:3;)

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

alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET MALWARE url404.com Spyware User-Agent (Httper)"; flow:to_server,established; content:"User-Agent\: Httper"; nocase; classtype:trojan-activity; reference:url,www.spywareguide.com/product_show.php?id=581; reference:url,doc.emergingthreats.net/bin/view/Main/2003487; reference:url,www.emergingthreats.net/cgi-bin/cvsweb.cgi/sigs/MALWARE/MALWARE_USER_Agents; sid:2003487; rev:3;)

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

alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET MALWARE url404.com Spyware User-Agent (Httper)"; flow:to_server,established; content:"User-Agent\: Httper"; nocase; classtype:trojan-activity; reference:url,www.spywareguide.com/product_show.php?id=581; sid:2003487; rev:2;)

Added 2008-01-28 17:24:20 UTC

alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"ET MALWARE url404.com Spyware User-Agent (Httper)"; flow:to_server,established; content:"User-Agent\: Httper"; nocase; classtype:trojan-activity; reference:url,www.spywareguide.com/product_show.php?id=581; sid:2003487; rev:2;)

Added 2008-01-28 17:24:20 UTC

alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (msg:"BLEEDING-EDGE MALWARE url404.com Spyware User-Agent (Httper)"; flow:to_server,established; content:"User-Agent\: Httper"; nocase; classtype:trojan-activity; reference:url,www.spywareguide.com/product_show.php?id=581; sid:2003487; rev:1;)

Added 2007-03-16 10:30:25 UTC

According to the reference, this redirects users from competitor sites to their client sites. Watch for this UA

-- MattJonkman - 16 Mar 2007